High Loads At Exactly The Same Time Everyday
Apr 30, 2009
has anyone else noticed an unusually high load occurring from 9 till 11 EEST time on their servers?
I've been getting high loads everyday this week at exactly these times.
I'm thinking that this is a crawler/bot that is causing the loads, i've already installed dos deflate and there hasn't been more than 100 connections from the same ip, so I'm ruling out any DOS attack ... besides, what kind of attack only takes place for 2 hours a day at exactly the same time?
I'm on a cpanel system and would like to know which logs to take a look at to determine the cause.
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Aug 26, 2007
I have a dedicated server with many websites on it. The problem is that I got very high load every day in the midnight I checked all "my" crontab and they are all fine. I even stopped them but nothing changed. My backup time is not the midnight, it's about 6 AM.
I tried everything I could but everything still like before high load every night.
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Dec 8, 2008
I have two vps's n ifferent hardware, after my hoster performed an update to node I am now seeing high loads on both vps's
When I reboot the problem goes for a while
My servers host very little websites and little activity and normally run fine
I have notice a process "unhide" running, what is this and where should I start looking for this issue
[root@vps ~]# top
top - 18:47:59 up 1 day, 6:51, 1 user, load average: 1.96, 1.95, 1.92
Tasks: 62 total, 2 running, 60 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0% us, 2.8% sy, 1.1% ni, 96.0% id, 0.0% wa, 0.0% hi, 0.0% si
Mem: 1048576k total, 143908k used, 904668k free, 0k buffers
Swap: 0k total, 0k used, 0k free, 0k cached
Unknown command - try 'h' for help
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
23980 root 26 10 1872 876 316 S 2.0 0.1 4:40.86 unhide
1 root 15 0 1644 568 484 S 0.0 0.1 0:03.76 init
1982 root 17 0 6412 1828 1124 S 0.0 0.2 0:00.00 crond
1985 root 18 0 2120 900 784 S 0.0 0.1 0:00.00 run-parts
3228 root 18 0 3252 1028 896 S 0.0 0.1 0:00.00 01-rkhunter
3229 root 18 0 1888 548 460 S 0.0 0.1 0:00.00 awk
3665 apache 15 0 39700 18m 6036 S 0.0 1.8 0:05.14 httpd
5771 apache 15 0 39540 16m 4516 S 0.0 1.6 0:01.14 httpd
7837 root 26 10 11320 9272 976 S 0.0 0.9 0:07.64 rkhunter
9958 apache 15 0 39608 18m 6024 S 0.0 1.8 0:02.84 httpd
11611 root 15 0 8584 2532 1964 S 0.0 0.2 0:00.01 sshd
11831 root 16 0 6144 476 324 S 0.0 0.0 0:00.00 vzctl
11836 root 16 0 2184 1264 1048 S 0.0 0.1 0:00.00 bash
13789 root 16 0 1548 528 436 S 0.0 0.1 0:00.38 syslogd
13794 root 18 0 1484 368 308 S 0.0 0.0 0:00.00 klogd
14022 apache 15 0 39432 15m 3868 S 0.0 1.6 0:00.72 httpd
17612 root 18 0 4056 1052 756 S 0.0 0.1 0:00.00 sshd
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May 6, 2008
I have a Quad Core Xeon server with 2 GB RAM. The server has some high traffic websites & at peak hours (4-5 hrs a day) the server load remains 10.0 to 50.0.
The sites on the server load very slow at these times. Here's the top result during heavy load
[url]
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Jan 2, 2008
I normally don't like too bother others with my problems but this time It seems I have no choice since I spent the whole afternoon trying to find out what the problem was and couldn't solve it "entirely".
Here's some hardware info:
Processor Information Processor #1 Vendor: GenuineIntel
Processor #1 Name: Intel(R) Xeon(R) CPU 3050 @ 2.13GHz
Processor #1 speed: 2133.418 MHz
Processor #1 cache size: 2048 KB
Processor #2 Vendor: GenuineIntel
Processor #2 Name: Intel(R) Xeon(R) CPU 3050 @ 2.13GHz
Processor #2 speed: 2133.418 MHz
Processor #2 cache size: 2048 KB
Memory Information Memory: 1031324k/1048320k available (2182k kernel code, 16308k reserved, 914k data, 240k init, 130816k highmem)
System Information Linux **************** 2.6.20-1.2320.fc5smp #1 SMP Tue Jun 12 19:40:16 EDT 2007 i686 i686 i386 GNU/Linux
Running Fedora Core 5 and working for over half year with almost no major problems, but today something totally weird just happened...
After waking up I logged to the server and realized how slow it was, I went to see more about that and for my surprise the loading was around 8 so I went to the mail queue to see if there were a few thousand mails, there were 16 mails... So I went to the see CPU % processes at WHM and I was stunted to see around 30 processes allegedly using over 11500% of the CPU or more!
My first thought was that cPanel smoked something before releasing a last update and I didn't realized it immediately so I downgraded from Release to Stable.
Nothing happened and I lost my time with this overheated overloaded and over-everything and I didn't changed any configuration.
I changed many old configs that... I don't know, might crashed with something that might changed... I was trying and looking for anything.
The load was getting up instead of down, it went up to around 60.
The final conclusion is that whenever I turn the MySQL on I got overwhelming loads otherwise the other services "only" give me around 1.5 of load but still very unstable.
I'm getting a little tired so my explanation may be a little confusing, sorry about that.
Anybody knows what this is? Did this ever happened to you? Extremely high loads without an obvious reason? If anyone could help me I would be thankful for that, I'm getting kind of desperate.
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May 3, 2007
We are having a problem with our Linux dedicated server. At time we are getting high server loads witch is causing the server to go down and reboot. This problem has been going on for over a month now and still liquid web can not tell me what is the cause of the high loads. We have upgraded our RAM to 2 GB. This look to fix the problem for the first week but now we are back to having high loads and downtime.
I'm not a IT person so do not know how to find the problem. Can anyone tell me what I can do the locate the problem. I do know how to access and do some things in the root but do not know enough to find and fix this issue.
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May 11, 2007
Recently, we've been getting a lot of high loads (every 30 mins or so..) This is what shows in the warning email that we receive:
---------------------------------
12.0 04:31:35 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --pid-file=/var/lib/mysql/swh.sellwebhost.com.pid --skip-external-locking
----------------------------------
We are using whm.. Any idea what might be causing this?
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Mar 25, 2009
Two of my VPS's with a company are now showing very high memory loads, even after a reboot, both server are located on different nodes and they both shot up to high ram loads at the same time today(9amGMT) ....
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Apr 6, 2007
I currently have a vps server from GIGEServers, running at 512mb of dedicated and 1024mb spike it seems like apache is using alot of resources, does anyone know of a less hog, or tips on tweaking it, and the same for mysql server any tips on tweaking.
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Mar 3, 2007
We just upgraded to VBulletin 3.6.5, and are experiencing strange behavior. My forums are on a dedicated server, 27,000 users.
We'll be running along fine with loads of .5-2.00, etc. Then suddenly, the loads start climbing to 50, 70, 85+. We've been trying to figure out why. We even went on a different (much more robust) server, still the same result. This only started happening after the upgrade. Restarting the server corrects the problem, but only until it happens again. It can happen at anytime - during peak or off peak. The server may run for an hour or two until this happens, or it can happen 10 minutes after a restart.
Late last night when loads were normal we benched the server hard, and it ran just fine. We just can't figure out where this load spike is coming from.
Server info below:
Servers:
Mysql: server version: 5.0.27-log
PHP: PHP 5.1.6 (cli) Zend Engine v2.1.0,
Apache Server version: Apache/2.2.3
Kernel: 2.6.19-1.2911.fc6 #1 SMP
Server:
Pentium III with 1 gig of ram
15k RPM SCSI Raid 5
1 Gig RAM
-----------------------------------------------------------------------
[root@forums forums]# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Pentium III (Coppermine)
stepping : 6
cpu MHz : 861.001
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca
cmov pat pse36 mmx fxsr sse
bogomips : 1722.41
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Pentium III (Coppermine)
stepping : 6
cpu MHz : 861.001
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca
cmov pat pse36 mmx fxsr sse
bogomips : 1721.51
--------------------------------------------------------------------------
my.cnf:
[root@forums forums]# cat /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log_error = /var/log/mysql_error.log
log-slow-queries = /var/log/mysql_slow_queries.log
safe-show-database
old_passwords
back_log = 20
skip-innodb
key_buffer_size = 256M
myisam_sort_buffer_size = 64M
join_buffer_size = 1M
read_buffer_size = 1M
sort_buffer_size = 2M
table_cache = 600
thread_cache_size = 384
wait_timeout = 35
connect_timeout = 10
tmp_table_size = 64M
max_heap_table_size = 64M
max_allowed_packet = 64M
max_connect_errors = 10
read_rnd_buffer_size = 524288
bulk_insert_buffer_size = 8M
query_cache_limit = 4M
query_cache_size = 48M
query_cache_type = 1
query_prealloc_size = 163840
query_alloc_block_size = 32768
default-storage-engine = MyISAM
[mysql.server]
user=mysql
basedir=/var/lib
[mysqld_safe]
err-log=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
open_files_limit = 8192
[mysqldump]
quick
max_allowed_packet = 16M
[myisamchk]
key_buffer = 64M
sort_buffer = 64M
read_buffer = 16M
write_buffer = 16M
-------------------------------------------------------
Relevant Apache:
StartServers 10
MinSpareServers 10
MaxSpareServers 15
ServerLimit 256
MaxClients 90
MaxRequestsPerChild 1000
---------------------------------------------------------
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Jan 16, 2008
top output from my server shows a this user was creating a lot of proccesses, even this process has been running for about 30 mins, how can I limit the time a process can stay alive? I suspect it was causing a high load on the server when started.
PID USER PR NI %CPU TIME+ %MEM VIRT RES SHR S COMMAND
5374 jvmcompa 30 10 0 0:30.01 0.3 16456 6740 3532 S php
15586 jvmcompa 30 10 0 0:00.02 0.3 16052 6380 3460 S php
8165 jvmcompa 30 10 0 0:00.02 0.3 15248 6372 3432 S php
15785 jvmcompa 30 10 0 0:00.02 0.3 15520 6368 3436 S php
15272 jvmcompa 30 10 0 0:00.02 0.3 16236 6348 3412 S php
15345 jvmcompa 30 10 0 0:00.02 0.3 17052 6316 3432 S php
15396 jvmcompa 30 10 0 0:00.02 0.3 16324 6312 3432 S php
15472 jvmcompa 30 10 0 0:00.02 0.3 15740 6312 3432 S php
15803 jvmcompa 30 10 0 0:00.02 0.3 15092 6312 3432 S php
8255 jvmcompa 30 10 0 0:00.02 0.3 16504 6304 3404 S php
8281 jvmcompa 30 10 0 0:00.02 0.3 15504 6304 3404 S php
15260 jvmcompa 30 10 0 0:00.02 0.3 15296 6304 3404 S php
8136 jvmcompa 30 10 0 0:00.02 0.3 16308 6280 3412 S php
8153 jvmcompa 30 10 0 0:00.02 0.3 16500 6280 3412 S php
8092 jvmcompa 30 10 0 0:00.02 0.3 15196 6276 3412 S php
8145 jvmcompa 30 10 0 0:00.02 0.3 15280 6264 3412 S php
32263 jvmcompa 25 10 0 0:00.10 0.1 9564 1204 776 S pure-ftpd
31773 jvmcompa 26 10 0 0:00.01 0.1 9448 1120 728 S pure-ftpd
14657 jvmcompa 25 10 0 0:00.00 0.0 8420 988 696 S pure-ftpd
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Jun 26, 2007
i have a really high load (100!) at backup time
i'm using cPanel and i'm using Incremental backup option!
is there any solution?
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Aug 12, 2008
Our linux server downe for 1 hour at 12pm
How can check why its down everyday at 12pm?
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Oct 21, 2008
I use a VPS with CentOS and LX-Admin. My VPS run only 1 forum phpbb3.0.2 and nothing else.
3 days ago, disk used was 2.6GB, yesterday disk used was 2.7BG and to day disk used is 2.8GB ...
I wonder why disk used of my VPS increase everyday? It's may be because of cache and log? How to clean unnecessary cache and log?
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Aug 7, 2008
I have a problem with hoster. Purchased virtual hosting. All worked fine for more than a year. I did not make any changes in websites recently. Last several days one issue appears constantly: website starts downloading very slowly (30-60 sec for 20 kb page, or connection timeout). And each day their tech support don't realy want to help me. Only after 3-4 emails they fix the problem, but on the next day the problem arises again. I suppose they just ignore my problem. Possibly server is overloaded by other sites, or software was not tuned correctly, or something like that, and hoster does not want to solve the problem.
What can I do with this hoster?
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Jul 13, 2008
For the past two weeks, our Hypertown RedHat RHEL 5.2 server has been going down everyday because of a wierd Kernel Panic problem.
Attached you can see what was displayed on the console at the time of the panic. This is what SoftLayer tech. support team was able to obtain from the console.
We are not using Samba or NFS-based applications.
Here is the server's info:
[kaware3@rannatweb ~]$ uname -a
Linux rannatweb.com 2.6.18-92.1.6.el5PAE #1 SMP Fri Jun 20 02:51:01 EDT 2008 i686 i686 i386 GNU/Linux
[kaware3@rannatweb ~]$ free
total used free shared buffers cached
Mem: 16632176 3244660 13387516 0 234480 1934632
-/+ buffers/cache: 1075548 15556628
Swap: 2096472 0 2096472
[kaware3@rannatweb ~]$ more /etc/fstab
LABEL=/1 / ext3 defaults 1 1
LABEL=/var1 /var ext3 defaults 1 2
LABEL=/boot1 /boot ext3 defaults 1 2
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
LABEL=SWAP-sda3 swap swap pri=0,defaults 0 0
/dev/sdb1 /disk1 ext3 defaults 0 0
/dev/sdc1 /disk2 ext3 defaults 0 0
/dev/sdd1 /disk3 ext3 defaults 0 0
[kaware3@rannatweb ~]$ iostat
Linux 2.6.18-92.1.6.el5PAE (rannatweb.com) 07/13/2008
avg-cpu: %user %nice %system %iowait %steal %idle
3.78 0.00 4.41 9.02 0.00 82.79
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
sda 90.93 1784.24 1401.45 2073549 1628690
sdb 156.49 1567.09 179.30 1821188 208368
sdc 47.39 443.82 565.21 515787 656864
sdd 0.06 0.88 0.01 1019 8
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Jun 12, 2008
We have running exim mail service in cpanel web server. Exim consumed some CPU% memory and lots of threads are opening. More than 2000 mails in queue everyday. How can we optimize the exim mail service?
top - 06:33:12 up 23:12, 1 user, load average: 0.03, 0.08, 0.08
PID USER PR NI %CPU TIME+ %MEM VIRT RES SHR S COMMAND
4777 mailnull 15 0 1 0:00.02 0.2 9324 3936 2680 S exim
1809 mailnull 16 0 0 0:00.09 0.1 8192 1156 808 S exim
1815 mailnull 24 0 0 0:00.00 0.1 8428 1100 764 S exim
4779 mailnull 16 0 0 0:00.00 0.0 8200 684 336 S exim
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Oct 6, 2009
I have a VPS from KnownHost for about a year for developing purposes. Great place to go for VPS's, by the way.
Anyway I just installed a game server on it and now the loads are about 0.5 when I do a "top" command.
Should I be worried? The server isn't really used for anything right now, that is why I am using it as a L4D server. Max 8 people on it.
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Nov 19, 2007
I was wondering about a specific VPS package I was considering. I have around 80~90 sites (and therefore accounts) that I need a nice place to call home, but I am wondering if maybe I would be asking too much of this VPS package:
40GB Disk Space
1000GB Transfer
P4 3.2GHz
800MHz Front Side Bus
1GB Guaranteed RAM | 2GB Burst RAM
CentOS 4
50% of CPU Guaranteed | Burst to...I don't remember.
All of the sites I would be hosting easily take up less than 100MB of space each. The most any of them use is 2-5GB of transfer. I know these levels are no where near my allotted resources, but do you think that serving 80-90 accounts like this is too much server load? There will only be 2 VPS' on each server, guaranteed.
Anyone with experience with a VPS and a decent set of accounts/domains, please let me know what you think.
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Aug 21, 2008
I have a shared host with them for a few months which the disk usage for home/backup is usually around 85-95%. Right now I am experiencing very slow download speed. What about yours?
Server Load 2.92 (8 cpus)
Memory Used 42.6 %
Swap Used 0.01 %
Disk /dev/sdc1 (/home) 91 %
Disk /dev/sdd1 (/backup) 90 %
Disk /dev/sde1 (/backup/cpbackup/weekly) 43 %
Disk /dev/ram0 (/ramdisk) 24 %
Disk /dev/sdb1 (/) 22 %
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Oct 10, 2007
I have a server running SUSE. dual quad core chips, 16 gigs of RAM.
It's a webserver only running Apache.
We have been having a problem the past few days where page loads take forever yet CPU load and RAM load are very, very low.
I've noticed when it happens when viewing HTOP that TASKS jump from about 350 average to 1000 average. Pages won't start loading until this number drops.
I see no errors in error_log or messages however restarting Apache seems to fix the issue?
I've tried messing around with KEEPALIVE settings with no help.
Any clues on where to start? Pretty lost on this one becuase I see no errors and the load both CPU and RAM are low.
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Apr 20, 2009
I'm not sure whats the problem with my server.
When accessing websites on our server, we will get a Website not found but after trying 2 or 3 times then the website loads.
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Nov 11, 2008
This is a rare issue i have on a RHEL 5.2 + cPanel server.
Server time is:
Tue Nov 11 17:02:51 CST 2008
Squirrelmail time show:
Code:
Last Refresh:
Tue, 5:02 pm
So, that is correct too..
But email arrives with -4 hours time, example:
webmaster@xxx.com 1:03 pm testing email
I already rebooted httpd, exim, and imap server, and the server itself too.. and problem stills.
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Apr 20, 2009
its 2am night here, and my sites are down....now there is no way i have too much traffic at midnight, also all my websites are new !
this is happening consistently since today morning and im getting no support apart from jargon filled replies from customer care
how do i tweak apache settings and what settings do i make to avoid this ?
im wondering what will happen after few months when my websites actually have good traffic coming in ?
We have checked your server. Please see the load average and process list given below:
The value 4.42 was the CPU load average at the time. A normal load should be below 1.00. I could see that Apache service is causing high load in your server.
So you can tweak Apache in order to reduce the CPU load. Please check and let us know if you need any further assistance.
++++++++++++++++++
[root@chi07 ~]# vzctl exec 18403 w
03:16:20 up 2 min, 0 users, load average: 4.42, 1.42, 0.50
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
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Jan 19, 2009
I was just looking at awstats for a domain that is not in use and only got a max of 10 visits a month till October 08.
Now since November 2008 I have been getting a lot of unique visitors from Italy but there is nothing on the domain, no folders or files.
Here is what AWStats say:
Nov 08: 710
Dec 08: 1593
Jan 09: 4243 (so far)
These are unique visitors 99% coming from Italy
What do you think going on ?
The domain in question is testingurl.com
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May 10, 2008
We have a few websites which get 90% Asian traffic. Looking to optimise the user experience in terms of loading time..
Any specific server providers good for asian traffic? How do I find the latency time for a server provider before I go ahead with buying the server?
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Aug 11, 2007
My server's experiencing very slow page loads.
I ran top and got this (screenshot attached)
Could we say that it is a bit high for one http process to use that much cpu/ram?
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Oct 9, 2012
Im using apache2.2 on Ubuntu 12.04. Im trying to password protect a page using htacces and/or the directory command.
Basically no matter what method I use to try and password the index page it doesnt work. I can protect pages and dir's below, but not in the root www of a vhost.
basically:
/home/cackles/mysite with index.html and .htaccess will allow index.html to load and wont prompt for a pass until the page is refreshed.
/home/cackles/mysite/subdir will prompt for a pass before it goes any further.
I purged and started from scratch again last night and for nothing, it would seem, well I learned/refreshed a few things so it wasnt a complete bust ... just 7hrs
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