High Apache CPU Load

My Server Is Very Slow, High CPU, High Apache Load

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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Apache 2.2.8 & High CPU Load

Mar 1, 2008

if anyone has had problems with high cpu load after upgrading APACHE to 2.2.8. We were running 1.3.5 with comfortable CPU loads of 2-10 on dual Xeon 2.8's. Now the loads are 20-70 with most of the CPU being used by many many httpd processes. I've heard that APACHE v2 does consume more resources, but am wondering if there was a problem with the build, or is it that much more demanding.

OTHER INFO:
WHM:11.15
CPANEL: 11.18
OS: CENTOS 4.6
KERNAL: 2.6.20.4-ts.grh.mh.i386

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Extremely High Apache Load

Jul 29, 2008

We've a quadcore Xeon and start to have issues with its very high cpu load (which is made by apache & mysqld,).

So here is ps aux:

Code:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 2040 620 ? Ss Jul13 0:13 init [3]
root 2 0.0 0.0 0 0 ? S Jul13 0:00 [migration/0]
root 3 0.0 0.0 0 0 ? SN Jul13 0:00 [ksoftirqd/0]
root 4 0.0 0.0 0 0 ? S Jul13 0:00 [watchdog/0]
root 5 0.0 0.0 0 0 ? S Jul13 0:00 [migration/1]
root 6 0.0 0.0 0 0 ? SN Jul13 0:00 [ksoftirqd/1]
root 7 0.0 0.0 0 0 ? S Jul13 0:00 [watchdog/1]
root 8 0.0 0.0 0 0 ? S Jul13 0:00 [migration/2]
root 9 0.0 0.0 0 0 ? SN Jul13 0:00 [ksoftirqd/2]
root 10 0.0 0.0 0 0 ? S Jul13 0:00 [watchdog/2]
root 11 0.0 0.0 0 0 ? S Jul13 0:00 [migration/3]
root 12 0.0 0.0 0 0 ? SN Jul13 0:00 [ksoftirqd/3]
root 13 0.0 0.0 0 0 ? S Jul13 0:00 [watchdog/3]
root 14 0.0 0.0 0 0 ? S< Jul13 0:00 [events/0]
root 15 0.0 0.0 0 0 ? S< Jul13 0:00 [events/1]
root 16 0.0 0.0 0 0 ? S< Jul13 0:00 [events/2]
root 17 0.0 0.0 0 0 ? S< Jul13 0:00 [events/3]
root 18 0.0 0.0 0 0 ? S< Jul13 0:00 [khelper]
root 19 0.0 0.0 0 0 ? S< Jul13 0:00 [kthread]
root 25 0.0 0.0 0 0 ? S< Jul13 0:01 [kblockd/0]
root 26 0.0 0.0 0 0 ? S< Jul13 0:01 [kblockd/1]
root 27 0.0 0.0 0 0 ? S< Jul13 0:01 [kblockd/2]
root 28 0.0 0.0 0 0 ? S< Jul13 0:03 [kblockd/3]
root 29 0.0 0.0 0 0 ? S< Jul13 0:00 [kacpid]
root 122 0.0 0.0 0 0 ? S< Jul13 0:00 [cqueue/0]
root 123 0.0 0.0 0 0 ? S< Jul13 0:00 [cqueue/1]
root 124 0.0 0.0 0 0 ? S< Jul13 0:00 [cqueue/2]
root 125 0.0 0.0 0 0 ? S< Jul13 0:00 [cqueue/3]
root 128 0.0 0.0 0 0 ? S< Jul13 0:00 [khubd]
root 130 0.0 0.0 0 0 ? S< Jul13 0:00 [kseriod]
root 205 0.0 0.0 0 0 ? S Jul13 0:46 [pdflush]
root 207 0.0 0.0 0 0 ? S< Jul13 0:43 [kswapd0]
root 208 0.0 0.0 0 0 ? S< Jul13 0:00 [aio/0]
root 209 0.0 0.0 0 0 ? S< Jul13 0:00 [aio/1]
root 210 0.0 0.0 0 0 ? S< Jul13 0:00 [aio/2]
root 211 0.0 0.0 0 0 ? S< Jul13 0:00 [aio/3]
root 383 0.0 0.0 0 0 ? S< Jul13 0:00 [kpsmoused]
root 433 0.0 0.0 0 0 ? S< Jul13 0:00 [ata/0]
root 434 0.0 0.0 0 0 ? S< Jul13 0:00 [ata/1]
root 435 0.0 0.0 0 0 ? S< Jul13 0:00 [ata/2]
root 436 0.0 0.0 0 0 ? S< Jul13 0:00 [ata/3]
root 437 0.0 0.0 0 0 ? S< Jul13 0:00 [ata_aux]
root 443 0.0 0.0 0 0 ? S< Jul13 0:00 [scsi_eh_0]
root 444 0.0 0.0 0 0 ? S< Jul13 0:00 [scsi_eh_1]...

They don't appear for some time if I kill them (a day or more). But it repeats again and again. One day there were 8 similar processes in total in max which used all 4 cores at 100% (and even ssh console was extremely slow to do something there).

I think that somebody is trying to make a small attack of some sort but I need to check it first. I tried to look at apache logs but there were too many posting requests from different IPs and no dublicates for little period of time so I had no success.

Anyway, that script worked for us for 4 years already and we didn't have any problems with it even on our old single core P4 2.8 ghz.

way to make sure is this an attack of some sort or just this script doesn't work correctly on our new machine?

Are there any ways to get IPs of visitors who are running posting.php with CPU overloading?

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Sep 10, 2008

been checking out this site for a while and finally decided to register because I have a problem. Also hope this is the correct forum for this topic, sorry if it isn't.

So I have a problem with Apache. One of the sites that I run/host has a moderately large vBulletin board, and Apache just seems to eat up the CPU. Load averages have shot up between 20-30 and I've seen it as high as 80. Apache and MySQL are optimized already, I'm using suPHP for security because there are other sites on this box.

The funny thing about this is that it only started happening about a week ago. After checking for rootkits and all that garbage, I reinstalled the OS just to be on the safe side. Everything comes back clean still. I also got fed up and hired Platinum Server Management for a month, to see if they could find a solution (and I've been interested in reselling their services, but that's not relevant). So far the only thing they can come up with is disable suPHP, which isn't an option. I do realize that suPHP is ~20-25 times slower than mod_php, but what totally baffles me is that it worked beforehand and started going all crazy like this. I did try running the site using an dso configuration, the load did drop, but nothing to be proud of.

This site, and the server overall hasn't had any increase in load, I've held off putting new accounts on it until I get this fixed.

In the meantime, I have said forums running on lighttpd, which lowered the load. (Also writing a tutorial on having lighty work with cPanel)

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Jan 22, 2007

write a cronjob so that apache will restart when the server reaches a load of 20.

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Sep 2, 2007

I deal with a server that gets positivey slammed once a week for a few months per year. I'd tell you how many hits we got tonight, but I'm still waiting for AWSTATS to chew through the 2gb access_log file...

Tonight, I made some changes that SEEM to work, but I"mn not sure what the long-term effects could be. If we have any apache experts on the forums, I'd really like to bend your ear for a few to see what you know.

Obviously, with PHP, we're limited to prefork MPM.

First of all, I dropped Timeout from 300 to 120. That should be MORE than enough time to know that we've timed out. Then I dropped KeepAliveTimeout to 5 from 15.

Here's the radical one. Watching the process list and the load, it seemed that load spiked when the processes hit their end of useful life and respawned. Duh. This was happening every four seconds at the load we were under. MaxRequestsPerChild was set to 10,000. I upped this to 80,000 over a period of hours that we were under the load. I didn't see any significant memory leakage, but it's the change I'm worried about the most. I've seen Apache do some bad things when people allow this to go unlimited, and had always used the relatively low default as a guide.

Besides not loading a bunch of dynamic modules (also done, I usually do this so I'm not worried about it), what else can I do tuning-wise to keep load down? Please note that caching and load-balancing aren't acceptable solutions; I have one server to work with (for now) and the boss says no to caching because of how frequently our information updates. We also have extensive .htaccess files, so there's no LHTTPD in my future.

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Jul 29, 2009

after installed php 5.2.10
nobody /usr/local/apache/bin/httpd -k start -DSSL

Code:
5896 nobody 0
81.5
1.3 /usr/local/apache/bin/httpd -k start -DSSL
mysql (5.0.81-community)
os : centos 5.3

Has been very fast server. Guide is accurate and if you leave.

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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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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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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

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So, how to know what causes high load and eating my Memory?

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Feb 6, 2008

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------------------------------
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

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May 11, 2007

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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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[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�

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High Load

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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High Load

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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High I/O Load

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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My Vps Is High Load

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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Very High Load

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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Rsync - High Load

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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MYSQL High Load!

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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High Load Average While Using SCP

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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Load Average Is High

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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High Server Load ...?

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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LFD Messages Regarding High Load...

Jun 16, 2009

I have a VPS with Future Hosting and recently I have been getting more and more notifications from LFD regarding high CPU load. For example:

Time: Sun Jun 14 06:50:48 2009 -0500
1 Min Load Avg: 9.47
5 Min Load Avg: 6.25
15 Min Load Avg: 3.68
Running/Total Processes: 2/105

I am getting at least one of these a day now and I am also getting alerts about services failing, SPAMD in particular but also EXIM (and messages about LFD being unable to determine the exim queue length). External monitors are also warning me about SMTP timeouts during the same time period that I get the "high load" errors.

Tech support seems a bit stumped by this one and ALWAYS come back with "load looks fine right now". With the frequency of the warning emails increasing I am getting very concerned about the stability of my VPS.

I am not running anything significant on my VPS yet with minimal visitors and load (RAM usage consistently stays below 300MB on a VPS with 1+GB RAM.

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