--- On Mon, 23/8/10, jaydeep chaudhari <chaudhari.jayd...@gmail.com> wrote:
From: jaydeep chaudhari <chaudhari.jayd...@gmail.com>
Subject: [Linux_Mantra] Apachi is eating my cpu
To: Linux_Mantra@yahoogroups.com, linuxvada...@yahoogroups.com
Date: Monday, 23 August, 2010, 6:56 PM
Dear All,
I am getting below mentioned error on my server
( Cent OS 5.2, Arch= ia64, 8GB ram quadcore processor)
Can anyone has faced same issue before? Please let me know if anyone has
solution for this
top - 17:25:26 up 3 days, 5:46, 5 users, load average: 83.86, 75.80,
73.61
Tasks: 284 total, 32 running, 252 sleeping, 0 stopped, 0 zombie
Cpu(s): 98.2%us, 1.7%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.1%si,
0.0%st
Mem: 8176480k total, 8125824k used, 50656k free, 308928k buffers
Swap: 16777184k total, 384k used, 16776800k free, 4593648k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2239 apache 16 0 160m 59m 13m R 29 0.7 2:12.41 /usr/sbin/httpd
10200 apache 25 0 158m 58m 13m R 13 0.7 0:31.80 /usr/sbin/httpd
12633 apache 25 0 161m 61m 14m R 13 0.8 3:13.62 /usr/sbin/httpd
13449 apache 25 0 156m 51m 11m R 13 0.6 0:19.00 /usr/sbin/httpd
13480 apache 25 0 156m 52m 13m R 13 0.7 0:17.11 /usr/sbin/httpd
13735 apache 25 0 162m 62m 14m R 13 0.8 4:10.05 /usr/sbin/httpd
15008 apache 20 0 156m 52m 13m R 13 0.7 0:07.55 /usr/sbin/httpd
15111 qmailq 25 0 144m 141m 2512 R 13 1.8 0:02.61
/usr/bin/clamscan --tempdir=/tmp/clamav.15108 -r --no-summary -
15443 qmailq 25 0 136m 132m 2176 R 13 1.7 0:02.20
/usr/bin/clamscan --tempdir=/tmp/clamav.15439 -r --no-summary -
2542 apache 25 0 156m 57m 14m R 13 0.7 2:49.90 /usr/sbin/httpd
4171 apache 21 0 156m 55m 13m R 13 0.7 2:19.41 /usr/sbin/httpd
10178 apache 25 0 156m 53m 13m R 13 0.7 0:37.95 /usr/sbin/httpd
4251 apache 25 0 161m 59m 14m R 13 0.7 2:40.70 /usr/sbin/httpd
13458 apache 25 0 156m 52m 13m R 12 0.7 0:15.14 /usr/sbin/httpd
10181 apache 25 0 157m 54m 12m R 12 0.7 0:45.07 /usr/sbin/httpd
23818 apache 25 0 160m 61m 14m R 11 0.8 4:13.89 /usr/sbin/httpd
32591 apache 25 0 156m 57m 14m R 10 0.7 3:12.05 /usr/sbin/httpd
1387 apache 25 0 156m 55m 14m R 10 0.7 1:38.51 /usr/sbin/httpd
4507 apache 25 0 169m 68m 14m R 10 0.9 2:22.30 /usr/sbin/httpd
13457 apache 25 0 156m 52m 13m R 10 0.7 0:20.15 /usr/sbin/httpd
13494 apache 25 0 156m 53m 13m R 10 0.7 0:17.70 /usr/sbin/httpd
15275 qmailq 25 0 144m 141m 2512 R 10 1.8 0:02.60
/usr/bin/clamscan --tempdir=/tmp/clamav.15272 -r --no-summary -
23417 apache 25 0 162m 63m 14m R 10 0.8 3:40.51 /usr/sbin/httpd
1240 apache 25 0 156m 55m 14m S 8 0.7 1:23.50 /usr/sbin/httpd
15056 apache 15 0 79024 34m 12m S 7 0.4 0:02.40 /usr/sbin/httpd
15279 mysql 15 0 468m 61m 12m S 7 0.8 26:55.86
/usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --u
648 apache 16 0 168m 68m 14m S 7 0.9 2:29.80 /usr/sbin/httpd
15572 qmailq 25 0 68912 63m 2176 R 7 0.8 0:00.70
/usr/bin/clamscan --tempdir=/tmp/clamav.15568 -r --no-summary -
23781 apache 16 0 159m 59m 14m S 7 0.7 4:15.02 /usr/sbin/httpd
--
Regards,
Jay
9870567672
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Sadhiq Wrote -
Note system load and apache are not necessarily related. You may be running
other processes in your scripts that are contributing to your load.
This all depends on other config/cgi issues.
Also note, if your dynamic sites are pulling from a database (ie mysql) with
poor indexing or badly written queries this will also boost your system load,
but has nothing to do with apache.
Are if you running PHP as CGI or as an Apache module ?
PHP as CGI is not a good thing to do, it will eat plenty of ressources.
For each page request a new process is started.
"use mod_fastcgi"
Start servers won't cause a high load. Min with a small max can often do this
by spawning and dropping processes to fast. Changing the max to a higher
number and raising the MaxRequests will decrease the rate of forking/killing
processes.
so try increasing ur
MaxRequests
&
reducing the Timeout value
The other way work arnd try Limiting cpu with Rlimitcpu directive in apache
This directive sets the soft and hard limits for maximum CPU usage of a process
in seconds. It takes one or two parameters. The first parameter,
soft-seconds, sets the soft resource limit for all processes. The second
parameter, hard-seconds, sets the maximum resource limit. Either parameter can
be a number, or ``max'', which indicates to the server that the limit should
match the maximum allowed by the operating system configuration. Raising the
maximum resource limit requires the server to be running as the user ``root'',
or in the initial start-up phase.
Ref -
http://httpd.apache.org/docs/current/mod/core.html#rlimitcpu
or
u can limit cpu with cpulimit or prm
Ref -
http://www.cyberciti.biz/faq/cpu-usage-limiter-for-linux/
http://www.webhostgear.com/85.html
If ur still stuck post ur conf & logs.
Apache performance tuning
http://httpd.apache.org/docs/2.0/misc/perf-tuning.html
Or
if ur caching doesnt increase try the following.
Drop Caches
Kernels 2.6.16 and newer provide
a mechanism to have the kernel drop the page cache and/or inode and
dentry caches on command, which can help free up a lot of memory. Now
you can throw away that script that allocated a ton of memory just to
get rid of the cache...
To use /proc/sys/vm/drop_caches, just echo a number to it.
To free pagecache:
# echo 1 > /proc/sys/vm/drop_caches
To free dentries and inodes:
# echo 2 > /proc/sys/vm/drop_caches
To free pagecache, dentries and inodes:
echo 3 > /proc/sys/vm/drop_caches
This is a non-destructive
operation and will only free things that are completely unused. Dirty
objects will continue to be in use until written out to disk and are
not freeable. If you run "sync" first to flush them out to disk, these
drop operations will tend to free more memory.
B.Sadhiq
[Non-text portions of this message have been removed]
