High Load With Many Proftpd Processes
Oct 25, 2007
I have a centos 4.4 server, I noticed the load is high and when I checked the top command I found the following:
Code:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
17212 root 25 0 11504 6236 908 R 57 0.3 195:58.73 http
27994 ftp 18 0 7624 2232 336 R 48 0.1 0:02.39 proftpd
7056 nobody 15 0 27764 10m 1884 S 8 0.5 0:00.62 httpd
4738 nobody 15 0 25788 8952 1976 S 7 0.4 0:08.01 httpd
7199 root 18 0 6376 3704 760 R 6 0.2 0:02.41 top
7021 nobody 16 0 27240 10m 1964 S 5 0.5 0:01.73 httpd
3999 nobody 16 0 26888 9.9m 2008 S 5 0.5 0:09.39 httpd
7180 nobody 15 0 26524 9524 1700 S 5 0.5 0:00.16 httpd
6330 nobody 15 0 26856 9.8m 1992 S 4 0.5 0:04.34 httpd
6272 nobody 15 0 26764 9912 1968 S 2 0.5 0:05.36 httpd
6239 nobody 15 0 25428 8476 1888 S 1 0.4 0:02.95 httpd
1 root 16 0 2300 96 68 S 0 0.0 4:46.28 init
20323 ftp 16 0 5116 428 312 S 0 0.0 0:00.92 proftpd
22126 ftp 16 0 5512 428 312 S 0 0.0 0:01.03 proftpd
22313 ftp 16 0 5644 424 312 S 0 0.0 0:01.00 proftpd
22781 ftp 16 0 5644 460 304 S 0 0.0 0:01.04 proftpd
22837 ftp 16 0 5644 424 312 S 0 0.0 0:01.02 proftpd
24157 ftp 16 0 5776 432 308 S 0 0.0 0:01.09 proftpd
24176 ftp 16 0 5776 432 308 S 0 0.0 0:01.09 proftpd
24989 ftp 16 0 6040 476 316 S 0 0.0 0:00.91 proftpd
25327 ftp 16 0 6172 548 308 R 0 0.0 0:01.02 proftpd
25526 ftp 16 0 6172 808 308 R 0 0.0 0:01.03 proftpd
26013 ftp 16 0 6172 1128 308 R 0 0.1 0:00.98 proftpd
26152 ftp 16 0 6172 1144 312 R 0 0.1 0:01.00 proftpd
26306 ftp 16 0 6172 1172 308 R 0 0.1 0:01.02 proftpd
26455 ftp 16 0 6172 1420 312 S 0 0.1 0:04.02 proftpd
26860 ftp 16 0 6172 928 308 S 0 0.0 0:01.04 proftpd
26936 ftp 16 0 6172 928 308 S 0 0.0 0:00.91 proftpd
27166 ftp 16 0 6172 800 308 S 0 0.0 0:00.96 proftpd
27329 ftp 16 0 6172 716 308 S 0 0.0 0:01.01 proftpd
15659 ftp 16 0 6172 592 308 S 0 0.0 0:00.99 proftpd
4944 ftp 16 0 6172 544 336 S 0 0.0 0:00.98 proftpd
5163 ftp 16 0 6304 544 336 S 0 0.0 0:00.99 proftpd
18964 ftp 16 0 6304 608 308 S 0 0.0 0:00.96 proftpd
19151 ftp 16 0 6304 620 328 S 0 0.0 0:00.99 proftpd
4986 ftp 16 0 6304 596 308 S 0 0.0 0:00.87 proftpd
30721 ftp 16 0 6436 612 312 S 0 0.0 0:00.94 proftpd
13808 ftp 16 0 6436 644 316 S 0 0.0 0:01.01 proftpd
13905 ftp 16 0 6436 640 316 S 0 0.0 0:00.97 proftpd
also when I checked the `ps aux` command I found a lot in this form:
Code:
ftp 22006 0.0 0.0 5512 424 ? S 01:24 0:01 proftpd: (accepting connections)
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Mar 23, 2008
a topic long time ago that my server load is frequently high.
I'm talking about something like this
Server Load 158.86
Memory Used 28.2 %
Swap Used 99.57 %
[url]
The only way to solve this problem is to identify the load earlier and kill all httpd process. What I did was
#killall -9 httpd
#killall -9 httpd
#killall -9 httpd
x 30~40 times until no pid process found & the server load is back to normal.
On previous thread, I tried to update mysql & php and it works,
Right now again I am experiencing high server load again...
I'm very sure it's caused by httpd but I am still unable to find out the real cause of the problem and which account user is the culprit for causing this high load.
Can someone assist me by telling me where/how to begin with?
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Jul 22, 2008
Is there a way to prevent a certain service from taking up a certain amount of load on the server?
Like, shouldn't there be a way I can tell gzip or exim how much server load they are allowed to take up on my server?
I know it may run them slower, but it will be for the better if I could set each one to only be able to have a max load peak or something.
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Feb 20, 2008
I have a cPanel server with 4GB RAM
My server hangs time to time, once or twice a day. This is the last status when it happens.
Server Load 75.90 (2 cpus)
Memory Used 92 %
Swap Used 65.78 %
When I was still inside SSH when it happens, the processes I can see inside "top" are a lot of httpd processes.
So I "killall -9 httpd", I had to do it 30~40 times
#killall -9 httpd
#killall -9 httpd
#killall -9 httpd
x 30~40 times until no pid process found & the server load is back to normal.
Before that, I check httpd fullstatus, they look very normal, same goes to what I see inside WHM Apache status & cpu usage status.
At first I thought it was a memory problem after consulting with a server admin, so I replaced all 4GB new ram stick (such a waste)
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Oct 31, 2009
My server is very slow, High CPU, High Apache load....
I got a new server and i had setup a script on it.
No server tweaks has been done.
I run a filehosting site so it gets very slow when traffic is high.
Here is some info:
Code:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4135 filedip 19 0 12812 8892 2212 R 18.9 0.4 0:00.74 index.cgi
3140 apache 15 0 22624 9604 2768 S 17.3 0.5 1:54.45 httpd
3556 apache 15 0 22792 9592 2768 S 17.3 0.5 0:43.53 httpd
3739 apache 15 0 22672 9556 2744 S 17.3 0.5 1:09.67 httpd
3884 apache 15 0 22664 9560 2744 S 17.3 0.5 0:23.98 httpd
3474 apache 15 0 22672 9572 2756 R 16.1 0.5 1:34.09 httpd
3548 apache 15 0 22792 9560 2740 S 16.1 0.5 1:33.67 httpd
3991 apache 15 0 22640 9588 2756 S 15.1 0.5 0:22.44 httpd
3475 apache 15 0 22672 9580 2756 S 13.2 0.5 1:31.42 httpd
3493 apache 15 0 22664 9592 2768 S 12.9 0.5 1:15.52 httpd
3769 apache 15 0 22664 9580 2756 S 12.9 0.5 0:45.19 httpd
3638 apache 15 0 22664 9576 2756 S 12.3 0.5 0:32.82 httpd
3724 apache 16 0 22664 9580 2756 R 12.3 0.5 0:34.25 httpd
3626 apache 15 0 22672 9580 2756 S 11.7 0.5 0:52.54 httpd
4023 apache 16 0 22792 9560 2740 R 11.3 0.5 0:13.16 httpd
3882 apache 15 0 22664 9576 2756 S 10.1 0.5 0:38.56 httpd
3005 apache 15 0 22672 9588 2768 R 9.1 0.5 2:06.61 httpd
I dont know much about server managment...
how to fix this so server doesnt go slow?
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Jul 2, 2009
I have a site that is eating up my server resources and need to know what the best solution for this is. I'm thinking of getting another server just for mysql but do not know what specs the server should be to handle the current traffic/database load and have the site run smoothly without slowing down to a snail's pace.
An alternative is to get another server just for the videos being served and leave the database and html on the current server. This is where I'm stuck and don't know what route to take with this.
My current server stats:
Dual Xeon 5130
4GB RAM
250GB
50 Mbit/sec
CentOS 3.9
Website traffic stats:
15,000 visitors/day
150,000 pageviews/day
Serving videos
I've attached screenshots of top and bandwidth usage per day. Hopefully with this information you could tell me if I need another server or if there are any things I can do to the current server to help things move faster.
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May 1, 2008
In learning that some hosts seem to be tightening shared hosting specs, I'm wondering what a 'simultaneous process' is... as from this clip: 'number of simultaneous processes should not exceed 5'.
Is each part - for example, graphics and includes - of an individual webpage a 'process'?
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Feb 28, 2008
I have a server that has server load showing at 25-40 (once it was even 53!), running like that for hours. The server has 4 cpus - and yet the sites on the server seem to run fine when I check them. What I'm wondering is, what exactly is load in this context; and how can load run so high like that without the server crashing?
According to top, the load is caused by httpd processes running under user 'nobody', that often take up double digit CPU percentage.
Does Apache always run under 'nobody'?
Is there any way to trace an httpd processes - which account it's for, or which physical script or URL is calling it?
And for top itself, the TIME field on one server of mine is in the format xx:xx (e.g. 3:25), on another it's TIME+ and in the format xx:xx.xx (e.g. 30:02.77). What exactly does this mean? I would asume it's minutes:seconds and minutes:seconds:hundredths, but while watching top it doesn't seem to correlate with that.
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Apr 24, 2007
I have 2 almost similar webservers:
debian 3.2, P4 3GHZ, 1 Gb ram, kernel 2.6, apache2, php4
Initial apache2.conf:
Code:
Timeout 4
KeepAlive Off
KeepAliveTimeout 2
ServerLimit 1500
<IfModule prefork.c>
StartServers 10
MinSpareServers 10
MaxSpareServers 15
MaxClients 1500
MaxRequestsPerChild 3000
</IfModule>
I update the sources.list on server 1 to mirrors of the new debian 4 etc . I run apt-get update and apt-get dist-upgrade . A whole bunch of things get updated (it was long time ago that I did this anyway). After some troubles with /boot/grub/menu.lst the server boots ok, and everything is well. This server used to have loads of 15-25 at peak times, but after the update its running very smooth with loads of 2-3 at the same peak times. I dont know why exactly, as I noticed updates in OS , kernel version (from 2.6.8x to 2.6.18) , apache2 , php (4.4.4-8+etch1) , and I also needed to update eaccelerator from 0.94 to 0.95 .
A few days later I update server 2. Everything seems to go the same, although the kernel version stays at 2.6.8-3-686. I dont think kernel version at start was exactly same at server 1. But the new php version is the same as server 1, and everything else looks the same too.
But when peak times are coming up, this server starts to have troubles. It is quickly rising to total of 200-300 processes , while server 1 always stays stable at 60-70.
Server 2 also reacts slow if I click somewhere on the site. It takes 5-10 seconds to show a new page. However the load stays pretty low at 1-2 . I see no big cpu usage and also no big memory usage. I have the impression that this server 2 is somehow wasting a lot of apache processes and is making things hard for itself without a real reason.
When I check the seperate mysql database server, I also notice a lot of processes.
Around 200-250 whereas it used to be 40-60. Sometimes this adds up so hard, that all webservers are blocked because mysql has too much processes. When I check the mysql connections, I see a few dozen things like 'unauthen ip:port Connect login' just hanging. All of them have the ip of webserver 2. Those extra apache processes are somehow hanging on to the mysql server without really doing something.
I dont know what is happening, but this server is underperforming very badly now. I managed to limit the problem by drastically lowering ServerLimit and MaxClients on webserver 2 , but this is no real solution. The server is still slow, at least now its not bringing down the others.
My question : what should I check for now ? I noticed a different structure in the conf files in debian etch, maybe something new has a bad influence on my old conf files? Is there something wrong with the combination of kernel+php version? I have no idea, please point me in the right direction so I can learn from this.
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Jun 25, 2007
I am thinking about making a little php file that will print a flash game with a link to my site below the actual game. Other webmasters can use this php file on their site to embed this game.
I'm on shared hosting with Bluehost at the moment. What will be the implications on bandwidth and CPU if these php files which serve the games become popular (get hit quite frequently per day/hour/second)?
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May 17, 2014
Our server is running; Plesk 11.0.9 and CentOS 5.7 it has a Q8200 CPU @ 2.33GHz and 2GB of RAM. Now there are just two websites on the server plus a couple of redirects/forwarding domains, although lots of domains are still on the server but turned off in Plesk. Both websites are OSCommerce sites and I just need to keep these sites going until the end of the year when we will switch to our new Joomla based website.
We have seen an increasing number of server crashes and after various checks of the logs, fitting a new BIOS battery, check of the hardware by EasySpace who host the server, installation of ClamAV, LMD and RKHunter (which did find some Trojans and Suspect software), I have traced it down to some external Http activity that is taking all of my CPU time and RAM. Here is a screen capture of the Htop listing and when I killed these processes the CPU and RAM went back to normal. The problem is that I usually have to restart the HTTPD service and sometimes things get so bad that the server crashes and I have to request a power cycle.
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Jul 2, 2008
I am running in a High load problem lately. I have one of those cheap 1and1 servers which was running fine until 2 weeks ago. Once I rebooted accidentaly, it did not come back with some unrepairable kernel errors and I had to re-image it.
I chose to reimage the server with CentOS 5, for better support. The new re-image worked fine for some days, at least so I thought and now I am having high loads. The server crashes if not monitored every moment as the load is unpredictable.
Just a restart of the Apache will bring the server back to normality, but I am not sure if it is apache or some other script to be blamed.
I have beeing monitoring through apache server-status, but I cannot organize something unusual in the high load moments.
At this moment for example:
top - 09:00:36 up 15:43, 3 users, load average: 3.57, 4.60, 5.32
Tasks: 144 total, 2 running, 142 sleeping, 0 stopped, 0 zombie
Cpu(s): 10.6%us, 6.5%sy, 0.0%ni, 18.7%id, 63.5%wa, 0.2%hi, 0.5%si, 0.0%st
12:00:29 AM CPU %user %nice %system %iowait %steal %idle
12:10:01 AM all 9.14 0.00 5.52 44.66 0.00 40.68
12:20:14 AM all 6.83 0.00 3.98 27.88 0.00 61.32
12:30:10 AM all 6.44 0.00 4.20 81.25 0.00 8.11
12:40:09 AM all 5.25 0.00 4.09 81.93 0.00 8.73
12:50:15 AM all 5.11 0.00 3.79 90.74 0.00 0.36
01:00:07 AM all 7.22 0.00 4.52 57.11 0.00 31.15
01:10:13 AM all 6.89 0.00 4.01 55.38 0.00 33.71
01:20:14 AM all 4.37 0.00 3.27 41.88 0.00 50.48
01:30:25 AM all 4.26 0.00 3.29 63.42 0.00 29.03
01:40:06 AM all 27.18 0.00 4.75 58.27 0.00 9.80
01:50:03 AM all 29.64 0.00 6.61 51.50 0.00 12.25
02:00:07 AM all 27.00 0.00 8.48 55.49 0.00 9.03
02:10:10 AM all 19.29 0.00 4.97 73.80 0.00 1.94
02:20:04 AM all 37.85 0.00 6.78 40.70 0.00 14.67
02:30:05 AM all 15.65 0.00 4.80 68.47 0.00 11.08
02:40:08 AM all 9.06 0.00 5.60 37.49 0.00 47.86
02:50:07 AM all 5.36 0.00 3.62 42.29 0.00 48.73
03:00:02 AM all 6.05 0.00 4.08 47.27 0.00 42.60
03:10:02 AM all 4.22 0.00 3.68 38.17 0.00 53.93
03:20:02 AM all 4.06 0.00 3.75 41.37 0.00 50.82
03:30:22 AM all 4.42 0.00 3.93 45.25 0.00 46.41
03:40:11 AM all 4.34 0.00 3.95 39.58 0.00 52.13
03:50:02 AM all 4.67 0.00 4.01 32.53 0.00 58.80
04:00:08 AM all 3.72 0.00 3.87 28.40 0.00 64.02
04:10:02 AM all 13.49 0.00 6.58 20.82 0.00 59.10
04:20:01 AM all 6.70 0.00 4.63 6.06 0.00 82.61
04:30:02 AM all 1.44 0.00 1.21 4.75 0.00 92.59
04:40:01 AM all 12.42 0.00 8.12 7.65 0.00 71.81
04:50:02 AM all 1.43 0.00 1.07 4.02 0.00 93.47
05:00:02 AM all 1.60 0.00 1.40 8.62 0.00 88.38
05:10:10 AM all 3.80 0.00 3.02 17.86 0.00 75.32
05:20:06 AM all 5.10 0.00 4.22 23.34 0.00 67.34
05:30:02 AM all 1.54 0.00 1.40 11.22 0.00 85.85
05:40:05 AM all 1.75 0.00 1.89 13.12 0.00 83.23
05:50:12 AM all 2.15 0.00 2.22 18.92 0.00 76.72
06:00:02 AM all 1.92 0.00 2.01 12.87 0.00 83.20
06:10:02 AM all 2.27 0.00 2.16 11.53 0.00 84.04
06:20:03 AM all 3.56 0.00 3.02 25.26 0.00 68.16
06:30:10 AM all 2.66 0.00 2.05 18.13 0.00 77.16
06:40:02 AM all 2.58 0.00 2.25 22.87 0.00 72.30
06:50:02 AM all 2.68 0.00 1.92 15.77 0.00 79.63
07:00:03 AM all 3.06 0.00 2.48 26.01 0.00 68.46
07:10:03 AM all 3.65 0.00 3.20 36.54 0.00 56.61
07:10:03 AM CPU %user %nice %system %iowait %steal %idle
07:20:03 AM all 4.40 0.00 3.28 43.86 0.00 48.46
07:30:02 AM all 4.10 0.00 3.17 31.30 0.00 61.43
07:40:06 AM all 7.67 0.00 3.95 50.79 0.00 37.59
07:50:02 AM all 4.72 0.00 3.11 44.30 0.00 47.86
08:00:03 AM all 5.57 0.00 3.72 47.15 0.00 43.56
08:10:07 AM all 10.66 0.00 3.59 71.62 0.00 14.13
08:20:17 AM all 5.67 0.00 3.42 58.81 0.00 32.10
08:30:10 AM all 11.12 0.00 3.49 76.71 0.00 8.67
08:40:03 AM all 7.00 0.00 3.36 47.94 0.00 41.71
Average: all 7.53 0.00 3.76 38.90 0.00 49.81
Some configurations:
The reimage partittioning looks like this:
/dev/sda1 950M 138M 765M 16% /
/dev/sda5 4.7G 1.9G 2.9G 40% /usr
/dev/sda7 63G 58G 5.0G 93% /var
/dev/sda6 4.7G 23M 4.7G 1% /home
none 1.0G 500K 1.0G 1% /tmp
KeepAlive On
MaxKeepAliveRequests 300
KeepAliveTimeout 15
<IfModule prefork.c>
StartServers 10
MinSpareServers 20
MaxSpareServers 50
ServerLimit 256
MaxClients 180
MaxRequestsPerChild 2000
</IfModule>
<IfModule worker.c>
StartServers 2
MaxClients 150
MinSpareThreads 25
MaxSpareThreads 75
ThreadsPerChild 25
MaxRequestsPerChild 0
</IfModule>
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
skip-locking
query_cache_limit=1M
query_cache_size=32M
query_cache_type=1
max_connections=250
interactive_timeout=100
wait_timeout=20
connect_timeout=10
thread_cache_size=80
key_buffer=64M
join_buffer=1M
max_allowed_packet=16M
table_cache=512
record_buffer=1M
sort_buffer_size=1M
read_buffer_size=1M
max_connect_errors=10
thread_concurrency=2
read_rnd_buffer_size=1M
myisam_sort_buffer_size=64M
server-id=1
processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 3
model name : Intel(R) Pentium(R) 4 CPU 2.80GHz
stepping : 4
cpu MHz : 2793.324
cache size : 1024 KB
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Nov 8, 2008
I have extremely high CPU load average, but when I run TOP command there are not any process with high CPU
CPU load averages:
211.65 (1 min) 227.29 (5 mins) 247.89 (15 mins)
Tasks: 364 total, 2 running, 360 sleeping, 2 stopped, 0 zombie
Cpu(s): 0.0%us, 0.3%sy, 0.0%ni, 0.0%id, 99.7%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 2065460k total, 2012372k used, 53088k free, 60964k buffers
Swap: 2040212k total, 3280k used, 2036932k free, 619900k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
19871 root 15 0 4944 2488 1656 R 1 0.1 0:02.73 top
1 root 15 0 4208 1320 1136 S 0 0.1 0:01.55 init
2 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/0
3 root 34 19 0 0 0 S 0 0.0 0:01.77 ksoftirqd/0
4 root RT 0 0 0 0 S 0 0.0 0:00.01 migration/1
5 root 34 19 0 0 0 S 0 0.0 0:01.16 ksoftirqd/1
6 root 10 -5 0 0 0 S 0 0.0 0:01.04 events/0
7 root 10 -5 0 0 0 S 0 0.0 0:00.65 events/1
8 root 10 -5 0 0 0 S 0 0.0 0:00.00 khelper
9 root 11 -5 0 0 0 S 0 0.0 0:00.00 kthread
35 root 10 -5 0 0 0 S 0 0.0 0:00.15 kblockd/0
36 root 10 -5 0 0 0 S 0 0.0 0:00.00 kblockd/1
37 root 15 -5 0 0 0 S 0 0.0 0:00.00 kacpid
127 root 10 -5 0 0 0 S 0 0.0 0:13.16 ata/0
128 root 16 -5 0 0 0 S 0 0.0 0:00.00 ata/1
129 root 10 -5 0 0 0 D 0 0.0 0:01.15 ata_aux
130 root 10 -5 0 0 0 S 0 0.0 0:00.00 kseriod
158 root 16 0 0 0 0 S 0 0.0 0:00.00 pdflush
159 root 15 0 0 0 0 D 0 0.0 0:01.00 pdflush
160 root 10 -5 0 0 0 S 0 0.0 0:10.68 kswapd0
161 root 11 -5 0 0 0 S 0 0.0 0:00.00 aio/0
So my server is "unresponsive" for abour 18 hours, burst net didnt answer my tickets and I dont know what to do. Ive been with this setup for almost 5 months with no problems, No changes have been made to hardware or software.
Im using Centos 5.0
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Jun 24, 2009
My VPS holds about 80 domains and low-use accounts.
Every night, from around 1.30am, the load suddenly skyrockets and will usually be around 5 to 10 for a few hours. Occasionally it'll spike to 30+ for a few minutes.
I had some antispam software running, and a couple of other packages (mail queues, mail manage etc), so I disabled all of that and removed all the crontab entries etc.
It's not really made any difference.
I can see the load stats going back 8 hours, as part of the ASSP spam package (I've just left the ASSP server load cron running just so I can continue monitoring it!)
Can the apparent load on my VPS be caused by other VPS's on the same node?? So in reality, my load is fine but is being affected by other people's VPS's?
I hope that makes sense. I'm 99% sure that my VPS is 'clean' (in so far as cron entries)
I'm asking the question because I took a second VPS on the same node and that one too has high loads overnight when there's nothing running on it (ie, no add-on software, no Cpanel accounts added)
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Apr 19, 2009
I have a VPS with LXadmin control panel and 1024 Ram.
the memory always 333-450 but now it is more than 800 and the VPS stopped I restarted it many times but after restarting it the memory gone crazy again.
So, how to know what causes high load and eating my Memory?
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Feb 6, 2008
when i install BFD and APF on my server thie processes appears every time on "top" commad on my server and it cuse hight load
------------------------------
4766 root 25 0 100 10:22.56 3.2 165m 130m 420 R grep -vf /usr/local/bfd/tmp/attack.pool.tmp
7747 root 25 0 100 30:20.34 9.8 430m 397m 420 R grep -vf /usr/local/bfd/tmp/attack.pool.tmp
----------------------------
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Jun 30, 2007
Just signed up for a VPS with solarvps, which so far is lightning fast compared to my shared reseller account with RZ.
I want to create a script which checks the server load and drops me a text message on my mobile if the server load hits a certain level.
Just wondering what I should consider a high server load?
The server is the JupiterLX UK one from solar vps with over just over 800mb of SLM RAM.
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May 11, 2007
Im in a VPS and everyday at the same hour goes very slowly due to high load problems.
The main site is a vBulletin forum and I get this error:
Too many connections
Ive change some details in my.cnf:
Quote:
max_connections=500
max_user_connections=70
But it didnt solve the problem.
This high load occurs at the same hour, I think that it is a cron job related problem, but this is my /etc/crontab
Quote:
# cat crontab
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root
HOME=/
# run-parts
01 * * * * root run-parts /etc/cron.hourly
02 4 * * * root run-parts /etc/cron.daily
22 4 * * 0 root run-parts /etc/cron.weekly
42 4 1 * * root run-parts /etc/cron.monthly
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Nov 28, 2007
i was previously using maxclients 256 in httpd.conf and the load was normal even when the server was processing 256 requests..
recently i had changed it to 320 coz of which my load had increased a lot.. Now when i have decreased it back to 256 the load is still high even when the no of requests are just 150..
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Mar 18, 2007
i have trouble with transport from company to another company
and i had problem with the best company ( resellerzoom.com )
i order one month this palnt ( Failover Plans ) then i swa this messeage
[PHP]
Hello,
Accounts usage is very high, MEMORY usage is very high than allowed limit of 3% for Daily average. You still have Cpanel/FTp access.
========================
Account usage Daily average
Average CPU%:- 1.23
Average MEM%:- 3.24
Top Process %CPU 58.0
PHP Code:
Top Process %CPU 54.0 /usr/bin/php forumdisplay.phpTop Process %CPU 52.0 /usr/bin/php showthread.php
i asked him what's can i do?
he toled me
PHP Code:
Upgrade to VPS or Semi-dedicated server
i don't want Upgrade vps with same company
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Dec 30, 2007
How can you tell if your server was a victim of a DDOS attack? Server load goes so high that you cannot get in via SSH, and the server has to be power cycled to get back online. When it comes back online, load goes back up, we shut apache down, and the let the load come back down and then restart apache and everything is fine. Any way to determine what caused the load to skyrocket? System has APF, BFD, and mod_evasive installed.
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Oct 5, 2007
I have 2 servers
Dual Quad Core 5310
One for Mysql and the other one for Httpd
I have one large website , when i put this website in one server i mean by one server is making the website work with mysql and httpd in one server no external server it's load seems to be on 1 - 5 but when i but the mysql on other server the load got high and i got high httpd connections , also when i try to see the the amount connections between the servers it's too high in one of them and low in the other and i am always suffering from load .
here the details
192.168.0.1 the mysql server
192.168.0.2 httpd server
[root@httpd etc]# netstat -n | grep 192.168 | wc -l
453
this the mysql server my.cnf conf
[root@mysql ~]# cat /etc/my.cnf
[mysqld]
safe-show-database
skip-name-resolve
skip-innodb
max_connections = 800
key_buffer = 96M
myisam_sort_buffer_size = 64M
join_buffer_size = 1M
read_buffer_size = 1M
sort_buffer_size = 2M
table_cache = 2500
thread_cache_size = 384
wait_timeout = 30
connect_timeout = 10
tmp_table_size = 128M
max_heap_table_size = 128M
max_allowed_packet = 64M
max_connect_errors = 10
thread_concurrency = 8
read_rnd_buffer_size = 1M
bulk_insert_buffer_size = 8M
query_cache_limit = 8M
query_cache_size = 128M
query_cache_type = 1
query_prealloc_size = 131072
query_alloc_block_size = 65536
[mysqld_safe]
nice = -10
open_files_limit = 8192
[mysqldump]
quick
max_allowed_packet = 16M
[myisamchk]
key_buffer = 64M
sort_buffer = 64M
read_buffer = 16M
write_buffer = 16M
[mysqlhotcopy]
interactive-timeout
[root@mysql ~]#
this the httpd.conf config
Timeout 30
KeepAlive On
MaxKeepAliveRequests 120
KeepAliveTimeout 1
MinSpareServers 15
MaxSpareServers 25
StartServers 15
MaxClients 256
MaxRequestsPerChild 1000
here the total connections in the mysql server
[root@mysql ~]# netstat -n | grep 192.168 | wc -l
25
[root@mysql ~]#
[root@mysql ~]# netstat -n | grep 192.168
tcp 0 0 192.168.0.1:3306 192.168.0.2:47876 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:48923 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:46610 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:47142 TIME_WAIT
tcp 0 0 192.168.0.1:3306 192.168.0.2:49209 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:44344 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:44365 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:44359 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:46406 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:44355 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:44352 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:48217 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:47208 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:46463 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:47229 TIME_WAIT
tcp 0 0 192.168.0.1:3306 192.168.0.2:46459 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:47987 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:46469 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:42371 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:47259 TIME_WAIT
tcp 0 0 192.168.0.1:3306 192.168.0.2:47252 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:46480 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:47275 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:47293 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:47291 TIME_WAIT
tcp 0 0 192.168.0.1:3306 192.168.0.2:47311 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:47304 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:47303 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:46530 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:49089 ESTABLISHED
tcp 0 100740 192.168.0.1:3306 192.168.0.2:47318 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:47315 ESTABLISHED
tcp 0 0 192.168.0.1:3306 192.168.0.2:47312 ESTABLISHED
[root@mysql ~]#
Do you see the high different number between connections !!
I am sorry for bad english but i am really get more pain daily with the high load
My server kernel
Linux httpd 2.6.18-8.1.8.el5 #1 SMP Tue Jul 10 06:50:22 EDT 2007 i686 i686 i386 GNU/Linux
I use CentOS 5 and httpd 1.3 and php 4.4.7
I try to upgrade them to httpd 2.0 and php 5.2.4 but most users can't browse the site so
i come back to 1.3
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Sep 11, 2007
I have upgraded the kernel, I have optimized the my.cnf (mysql), the swap file is free.
The memory is not overloaded even then the I/O wait is too high, the top result is as below
The server become very very slow due to high I/O load, I am failed to dins out the reason. Please help me with the commands so I can sort it out
top - 06:09:17 up 13 min, 2 users, load average: 7.51, 8.26, 5.35
Tasks: 179 total, 1 running, 178 sleeping, 0 stopped, 0 zombie
Cpu(s): 2.7% us, 2.0% sy, 0.0% ni, 0.0% id, 95.0% wa, 0.3% hi, 0.0% si
Mem: 1027536k total, 1014232k used, 13304k free, 114232k buffers
Swap: 2040244k total, 0k used, 2040244k free, 242300k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3474 apache 16 0 92232 54m 5780 D 0.7 5.4 0:04.01 httpd
2914 named 18 0 39448 4404 1964 S 0.3 0.4 0:01.44 named
3067 mysql 15 0 283m 42m 4288 S 0.3 4.3 0:03.87 mysqld
3826 popuser 15 0 34572 29m 2348 D 0.3 2.9 0:10.69 spamd
3876 apache 15 0 93716 55m 5512 S 0.3 5.5 0:03.41 httpd
7049 root 17 0 10508 2572 1996 S 0.3 0.3 0:00.05 sshd
7161 root 26 10 12712 5804 2656 S 0.3 0.6 0:00.37 mytop
7651 root 16 0 2784 1020 760 R 0.3 0.1 0:00.03 top
7688 popuser 16 0 6068 932 740 D 0.3 0.1 0:00.01 imapd
1 root 16 0 2588 552 472 S 0.0 0.1 0:00.72 init
2 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0
3 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 events/0
4 root 9 -10 0 0 0 S 0.0 0.0 0:00.00 khelper
5 root 15 -10 0 0 0 S 0.0 0.0 0:00.00 kacpid
19 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 kblockd/0
20 root 15 0 0 0 0 S 0.0 0.0 0:00.00 khubd
37 root 20 0 0 0 0 S 0.0 0.0 0:00.00 pdflush
38 root 15 0 0 0 0 S 0.0 0.0 0:00.03 pdflush
39 root 15 0 0 0 0 S 0.0 0.0 0:00.01 kswapd0
40 root 11 -10 0 0 0 S 0.0 0.0 0:00.00 aio/0
186 root 25 0 0 0 0 S 0.0 0.0 0:00.00 kseriod
415 root 15 0 0 0 0 D 0.0 0.0 0:00.32 kjournald
1606 root 7 -10 0 0 0 S 0.0 0.0 0:00.00 ata/0
1607 root 7 -10 0 0 0 S 0.0 0.0 0:00.00 ata_aux
1617 root 6 -10 2044 448 380 S 0.0 0.0 0:00.01 udevd
1850 root 6 -10 0 0 0 S 0.0 0.0 0:00.00 kauditd
1915 root 19 0 0 0 0 S 0.0 0.0 0:00.00 kjournald
1916 root 19 0 0 0 0 S 0.0 0.0 0:00.00 kjournald
2698 root 15 0 3540 548 456 S 0.0 0.1 0:00.26 syslogd
2702 root 16 0 1564 384 316 S 0.0 0.0 0:00.00 klogd
2729 rpc 15 0 3560 548 452 S 0.0 0.1 0:00.00 portmap
2748 rpcuser 18 0 2348 724 620 S 0.0 0.1 0:00.00 rpc.statd
2774 root 16 0 5944 344 172 S 0.0 0.0 0:00.00 rpc.idmapd
2845 root 19 0 2568 472 264 S 0.0 0.0 0:00.00 smartd
2854 root 18 0 2928 444 368 S 0.0 0.0 0:00.00 acpid
2863 root 16 0 9548 2008 1456 S 0.0 0.2 0:00.02 cupsd
2957 root 16 0 5440 1132 832 S 0.0 0.1 0:00.04 sshd
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May 11, 2007
eveyday i see my vps high load
1st problem <<<<
now i show this error for load in CPU/Memory/MySQL Usage
--------------------------------------------
/usr/sbin/mysqld --basedir/ --datadir/var/lib/mysql --usermysql --pid-file/var/lib/mysql/server.nogomhost.net.pid --skip-external-locking
---------------------------------------------
this " mysql " used 90% and 80 % from CPU
And all account used sql 0.0 , why load mysql ?
2nd problem <<<<
some times my vps is down , i don't why
3rd prblem <<<
my vps is not working to some clients , i make allow after user's sent to me ip's by apf program
i'm Disable Backup " Restore only "
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Mar 22, 2007
top - 00:21:30 up 4 min, 1 user, load average: 20.30, 6.74, 2.42
Tasks: 221 total, 12 running, 209 sleeping, 0 stopped, 0 zombie
Cpu(s): 33.7% us, 4.4% sy, 0.0% ni, 0.0% id, 61.8% wa, 0.1% hi, 0.0% si
Mem: 1025804k total, 639076k used, 386728k free, 1296k buffers
Swap: 2031608k total, 22584k used, 2009024k free, 23804k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3359 apache 16 0 30968 16m 5752 S 11.9 1.7 0:00.61 httpd
3065 apache 16 0 31092 16m 5776 S 5.0 1.7 0:01.38 httpd
2478 apache 16 0 29068 14m 5680 S 4.0 1.5 0:00.80 httpd
2822 apache 16 0 28420 14m 5756 D 4.0 1.4 0:00.59 httpd
2810 apache 16 0 31412 17m 5764 R 3.0 1.7 0:01.72 httpd
3111 apache 15 0 29312 14m 5756 D 3.0 1.5 0:00.76 httpd
3787 apache 16 0 29164 14m 5668 S 3.0 1.4 0:00.09 httpd
2816 apache 16 0 31556 17m 5776 S 2.6 1.7 0:01.20 httpd
3063 apache 16 0 29740 15m 5760 S 2.3 1.5 0:01.65 httpd
3226 apache 15 0 31132 16m 5772 D 2.3 1.7 0:01.62 httpd
3007 apache 16 0 29160 14m 5744 S 2.0 1.5 0:00.59 httpd
3058 apache 16 0 31612 17m 5764 S 2.0 1.7 0:00.92 httpd
3064 apache 15 0 30300 15m 5764 S 2.0 1.6 0:01.59 httpd
3481 apache 16 0 29032 14m 5752 S 2.0 1.5 0:00.15 httpd
3503 apache 16 0 29076 14m 5756 S 2.0 1.5 0:00.48 httpd
2589 apache 15 0 28980 14m 5760 S 1.7 1.4 0:00.94 httpd
3069 apache 15 0 30900 16m 5760 S 1.7 1.7 0:01.92 httpd
httpd.conf
Quote:
ServerType standalone
ServerRoot "/etc/httpd"
LockFile /var/run/httpd.lock
PidFile /var/run/httpd.pid
ScoreBoardFile logs/apache_runtime_status
ResourceConfig /dev/null
AccessConfig /dev/null
Timeout 30
KeepAlive Of
MaxKeepAliveRequests 100
KeepAliveTimeout 5
MinSpareServers 8
MaxSpareServers 18
StartServers 10
MaxClients 100
MaxRequestsPerChild 500
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Jul 25, 2007
I am using rsync to transfer files (tar.gz) between servers. However, it makes server load increasing 3-4. Normally, server load can be around 1, but when doing the transfer, it can go up to 5+
Is there anyway to reduce the load when doing rsync?
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Aug 23, 2007
I am just a beginner and it is about a month that the mysql loads on my server is so high , I have checked the mysql processlist via cpanel and there is no account that takes high mysql and make it high , and even I have checked for any possible rotten databases. but still the server load is so high and I can not control it , even when I restart it just after a minute it goes up again.
just the spamd command takes a high CPU usage sometimes. what it should be from? the spamd for a special account!
I need to optimize mysql , and need help. please do not tell me to hire an expert , just help me thanks
and another question is that how can I check which account is sending spam and stop it?
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Oct 22, 2009
I have to move about 50 GB each night from one server to another.
This is the command I'm using:
Code:
/bin/nice -n +19 scp -c blowfish -l 18000 -P 22222 root@XX.XX.XX.XX:/backup/dailybacks/*.tar.gz ./
There is no private lan so i have to use internet. I'm using blowfish, which will reduce cpu load, and also limiting bandwidth transfer, usign -l 18000. How ever, I still do see some high load averages..
Do you have any other suggestion to optimize CPU performance while running scp?
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Jun 20, 2009
Why my server - load average is high?
below is output of top:
top - 13:52:53 up 29 days, 5:39, 3 users, load average: 72.05, 68.90, 67.89
Tasks: 857 total, 2 running, 833 sleeping, 20 stopped, 2 zombie
Cpu(s): 4.2%us, 2.5%sy, 0.0%ni, 26.4%id, 63.6%wa, 0.5%hi, 2.8%si, 0.0%st
Mem: 8181908k total, 8135188k used, 46720k free, 35104k buffers
Swap: 4192956k total, 26624k used, 4166332k free, 7321172k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
337 mysql 15 0 327m 56m 4252 S 4.0 0.7 74:18.53 mysqld
24732 root 15 0 13380 1760 808 R 1.0 0.0 0:10.44 top
313 root 10 -5 0 0 0 S 0.3 0.0 90:25.28 kswapd0
22040 nobody 15 0 63148 3272 1572 S 0.3 0.0 0:00.30 httpd
22136 nobody 15 0 63148 3260 1572 S 0.3 0.0 0:00.21 httpd
22291 nobody 15 0 63148 3280 1580 S 0.3 0.0 0:00.18 httpd
22327 nobody 16 0 63148 3280 1580 D 0.3 0.0 0:00.20 httpd
22406 nobody 15 0 63148 3276 1580 S 0.3 0.0 0:00.18 httpd
22522 nobody 16 0 63148 3268 1580 S 0.3 0.0 0:00.10 httpd
23553 nobody 16 0 63148 3244 1556 S 0.3 0.0 0:00.09 httpd
23556 nobody 15 0 63148 3256 1568 S 0.3 0.0 0:00.09 httpd
26260 nobody 16 0 63148 3296 1608 S 0.3 0.0 0:00.13 httpd
26618 nobody 16 0 63148 3244 1556 S 0.3 0.0 0:00.13 httpd
28849 nobody 16 0 63148 3240 1556 S 0.3 0.0 0:00.04 httpd
28903 nobody 15 0 63148 3208 1532 S 0.3 0.0 0:00.02 httpd
29533 nobody 15 0 0 0 0 Z 0.3 0.0 0:00.02 httpd <defunct>
29558 nobody 15 0 63148 3236 1548 S 0.3 0.0 0:00.01 httpd
29587 nobody 15 0 63148 3216 1536 S 0.3 0.0 0:00.01 httpd
29592 nobody 15 0 63148 3208 1532 S 0.3 0.0 0:00.02 httpd
1 root 15 0 10344 576 544 S 0.0 0.0 0:05.36 init
2 root RT -5 0 0 0 S 0.0 0.0 3:58.90 migration/0
3 root 34 19 0 0 0 S 0.0 0.0 6:15.52 ksoftirqd/0
4 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/0
5 root RT -5 0 0 0 S 0.0 0.0 0:12.33 migration/1
6 root 34 19 0 0 0 S 0.0 0.0 0:30.07 ksoftirqd/1
7 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/1
8 root RT -5 0 0 0 S 0.0 0.0 0:02.57 migration/2
9 root 34 19 0 0 0 S 0.0 0.0 0:02.84 ksoftirqd/2
10 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/2
11 root RT -5 0 0 0 S 0.0 0.0 0:11.61 migration/3
12 root 34 19 0 0 0 S 0.0 0.0 0:01.12 ksoftirqd/3
13 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/3
14 root 10 -5 0 0 0 S 0.0 0.0 0:00.22 events/0
15 root 10 -5 0 0 0 S 0.0 0.0 0:00.10 events/1
16 root 10 -5 0 0 0 S 0.0 0.0 0:00.16 events/2
17 root 10 -5 0 0 0 S 0.0 0.0 0:00.09 events/3
18 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 khelper
87 root 10 -5 0 0 0 S 0.0 0.0 0:00.03 kthread
94 root 10 -5 0 0 0 S 0.0 0.0 0:00.78
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May 7, 2009
do you know what my server having very strange problem my server load suddenly increas after every 2 or 3 days some time after 1 days but when we talk about those days in which server load is fine then that time server load very low almost 0.4 to 0.1 .
But on that high load day server load reached upto 500.
when i try to find out what wrong then i only get that there is too much connection of http when i kill httpd through this killall -KILL httpd then server load suddenly decrease and then stable.
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