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+--- Thread: php5-cgi huge memory usage (/thread-11541.html)
php5-cgi huge memory usage - bleed - 08-30-2010 06:26 AM
I'm using ispCP for 3 month now.
At first I didn't noticed, but now (for about month) php5-cgi processes ar using a lot of memory:
Code:
29329 vu2080 230356 kB /usr/bin/php5-cgi
29195 vu2034 230284 kB /usr/bin/php5-cgi
29340 vu2089 229840 kB /usr/bin/php5-cgi
29330 vu2080 229632 kB /usr/bin/php5-cgi
29320 vu2079 229336 kB /usr/bin/php5-cgi
29321 vu2079 229120 kB /usr/bin/php5-cgi
29191 vu2034 225880 kB /usr/bin/php5-cgi
29338 vu2089 225880 kB /usr/bin/php5-cgi
29341 vu2089 225880 kB /usr/bin/php5-cgi
29324 vu2080 225436 kB /usr/bin/php5-cgi
29336 vu2010 225396 kB /usr/bin/php5-cgi
29337 vu2010 225352 kB /usr/bin/php5-cgi
29314 vu2079 224912 kB /usr/bin/php5-cgi
29334 vu2010 224912 kB /usr/bin/php5-cgi
29316 vu2126 167644 kB /usr/bin/php5-cgi
29308 vu2143 165820 kB /usr/bin/php5-cgi
29309 vu2143 165568 kB /usr/bin/php5-cgi
29357 vu2079 165424 kB /usr/bin/php5-cgi
29315 vu2126 165148 kB /usr/bin/php5-cgi
29389 vu2145 163764 kB /usr/bin/php5-cgi
29388 vu2145 163644 kB /usr/bin/php5-cgi
29318 vu2081 163472 kB /usr/bin/php5-cgi
29319 vu2081 163472 kB /usr/bin/php5-cgi
29356 vu2079 163160 kB /usr/bin/php5-cgi
29347 vu2036 163112 kB /usr/bin/php5-cgi
20179 vu2000 163108 kB /usr/bin/php5-cgi
29346 vu2036 163104 kB /usr/bin/php5-cgi
20191 vu2000 162580 kB /usr/bin/php5-cgi
29353 vu2080 161968 kB /usr/bin/php5-cgi
29327 vu2005 161072 kB /usr/bin/php5-cgi
29328 vu2005 161072 kB /usr/bin/php5-cgi
29352 vu2080 161020 kB /usr/bin/php5-cgi
29306 vu2143 160344 kB /usr/bin/php5-cgi
29310 vu2126 160344 kB /usr/bin/php5-cgi
29312 vu2081 160344 kB /usr/bin/php5-cgi
29323 vu2005 160344 kB /usr/bin/php5-cgi
29342 vu2090 160344 kB /usr/bin/php5-cgi
29343 vu2036 160344 kB /usr/bin/php5-cgi
29350 vu2080 160344 kB /usr/bin/php5-cgi
29354 vu2079 160344 kB /usr/bin/php5-cgi
29378 vu2145 160344 kB /usr/bin/php5-cgi
29387 vu2001 160344 kB /usr/bin/php5-cgi
29404 vu2001 160344 kB /usr/bin/php5-cgi
29406 vu2001 160344 kB /usr/bin/php5-cgi
29538 vu2115 160344 kB /usr/bin/php5-cgi
29540 vu2115 160344 kB /usr/bin/php5-cgi
29541 vu2115 160344 kB /usr/bin/php5-cgi
32277 vu2000 160344 kB /usr/bin/php5-cgiI think it's way too much.
I'm running on Ubuntu Linux 9.10
Linux 2.6.31-22-generic on x86_64
AMD Phenom™ II X6 1055T Processor, 6 cores, 4GB of RAM
using latest ispCP Omega 1.0.6
I tried to change some apache2 configuration, but finally came back to default.
If needed some specific configuration details - just ask!
What might it be? Some kind of bug or just because of my "knowledge" of linux and running servers?
RE: php5-cgi huge memory usage - joximu - 08-30-2010 08:12 PM
It's ok to use the memory which is available.
It's only a problem if the need of RAM is hight than the available....
But sometimes there are "lost" php-processes which consume cpu-load and memory. They can be killed. If you give the command how you go the list above - we can compare...
/J
RE: php5-cgi huge memory usage - bleed - 08-30-2010 11:15 PM
I'm just beginner at linux. I used webmin to get that list.
Don't know if it's also normal, but RAM is full and also 2GB of swap is beeing used.
RE: php5-cgi huge memory usage - vanshyr - 09-03-2010 01:21 AM
In shell prompt type the comand (as root): ps aux
It output a list of proceses used by all users, all programs and how much memory they are using.
maybe other process and not php/apache is using the big part of ram.
If i do it returns this:
Code:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
clamav 3139 0.0 1.7 183848 143896 ? Ssl Jun29 32:49 /usr/sbin/clamd
root 8608 0.0 0.1 12912 8792 ? S Sep01 0:00 /usr/bin/perl /var/www/ispcp/engine/ispcp-apache-logger -e
root 8611 0.0 0.1 13184 9048 ? S Sep01 0:01 /usr/bin/perl /var/www/ispcp/engine/ispcp-apache-logger
www-data 8612 0.0 0.0 18404 5204 ? S Sep01 0:00 /usr/sbin/apache2 -k start
www-data 8613 0.0 0.0 18724 5328 ? S Sep01 0:00 /usr/sbin/apache2 -k start
www-data 8616 0.0 0.1 245092 12108 ? Sl Sep01 0:11 /usr/sbin/apache2 -k start
www-data 8644 0.0 0.1 244992 11968 ? Sl Sep01 0:10 /usr/sbin/apache2 -k start
vu2027 8698 0.0 0.0 20068 5664 ? Ss Sep01 0:00 /usr/bin/php5-cgi
vu2027 8699 0.0 0.0 20360 4752 ? S Sep01 0:01 /usr/bin/php5-cgi
vu2027 8700 0.0 0.0 20360 4756 ? S Sep01 0:01 /usr/bin/php5-cgi
vu2035 8758 0.0 0.0 20068 5660 ? Ss Sep01 0:00 /usr/bin/php5-cgi
vu2035 8759 0.0 0.1 27924 10620 ? S Sep01 0:27 /usr/bin/php5-cgi
vu2035 8760 0.0 0.1 28744 11208 ? S Sep01 0:28 /usr/bin/php5-cgi
vu2013 8765 0.0 0.0 20068 5664 ? Ss Sep01 0:00 /usr/bin/php5-cgi
vu2013 8766 0.0 0.0 21324 6316 ? S Sep01 0:06 /usr/bin/php5-cgi
vu2013 8767 0.0 0.0 21340 6408 ? S Sep01 0:05 /usr/bin/php5-cgi
vu2016 8801 0.0 0.0 20068 5664 ? Ss Sep01 0:00 /usr/bin/php5-cgi
vu2016 8802 0.0 0.0 20508 4604 ? S Sep01 0:00 /usr/bin/php5-cgi
vu2016 8803 0.0 0.0 20508 4604 ? S Sep01 0:00 /usr/bin/php5-cgi
vu2017 9134 0.0 0.0 20068 5664 ? Ss Sep01 0:00 /usr/bin/php5-cgi
vu2017 9135 0.0 0.0 24832 7476 ? S Sep01 0:03 /usr/bin/php5-cgi
vu2017 9136 0.0 0.1 27872 10500 ? S Sep01 0:04 /usr/bin/php5-cgi
backuppc 9149 0.0 0.0 13496 7864 ? S Aug11 0:14 /usr/bin/perl /usr/share/backuppc/bin/BackupPC -d
backuppc 9155 0.0 0.0 9692 4792 ? S Aug11 0:01 /usr/bin/perl /usr/share/backuppc/bin/BackupPC_trashClean
vu2015 9340 0.0 0.0 20068 5660 ? Ss Sep01 0:00 /usr/bin/php5-cgi
vu2015 9341 0.0 0.0 20068 3604 ? S Sep01 0:00 /usr/bin/php5-cgi
vu2015 9342 0.0 0.0 20068 3764 ? S Sep01 0:00 /usr/bin/php5-cgi
vu2033 9462 0.0 0.0 20068 5664 ? Ss Sep01 0:00 /usr/bin/php5-cgi
vu2033 9463 0.0 0.1 29404 12052 ? S Sep01 0:12 /usr/bin/php5-cgi
vu2033 9464 0.0 0.1 28388 11072 ? S Sep01 0:14 /usr/bin/php5-cgi
root 12563 0.0 0.0 12848 6164 ? Ss Aug31 0:00 /usr/bin/perl -T /usr/bin/iwatch -f /etc/iwatch/iwatch.xml -p /var/run/iwatch.pid -d
root 17577 0.0 0.0 4036 1204 ? S Aug21 0:00 /usr/bin/couriertls -server -tcpd /usr/lib/courier/courier/imaplogin /usr/bin/imapd Maildirlook i have many process too, but they consume 0.01 of Mem and 0 CPU, except the first one (1,7 Mem), an antivirus system, maybe in that moment it was analizing some file.
anf if i take a look at my memory usage right now:
Code:
free -m
total used free shared buffers cached
Mem: 8114 7858 255 0 202 6807
-/+ buffers/cache: 848 7266
Swap: 2859 0 2859It seems that i have only 255 Mem free, but look at line 'buffers/cache' it have 7266Mb cached (can be replaced by differents process but is 'free' for be occuped by who needs).
Using swap memory 'nots good' it means that you lack Ram and need to 'virtualize' it in HDD.
So try the above command and try to find what process its really using the ram.
(You should to evaluate too, how many users you have?, maybe the RAM is well used but you need to put more ram on the server).
(08-30-2010 11:15 PM)bleed Wrote: I'm just beginner at linux. I used webmin to get that list.
Don't know if it's also normal, but RAM is full and also 2GB of swap is beeing used.
RE: php5-cgi huge memory usage - Kwik - 10-27-2010 05:15 PM
I have the same problem for two days now.
Code:
vu2012 4374 77.8 0.1 81060 7940 ? R Oct26 626:20 /usr/bin/php5-cgi
vu2012 27454 52.2 0.1 81124 7992 ? R 03:13 176:46 /usr/bin/php5-cgi
vu2012 27792 44.0 0.1 81088 7956 ? R 03:53 131:19 /usr/bin/php5-cgi
vu2012 28747 33.5 0.1 81100 7992 ? R 05:26 68:47 /usr/bin/php5-cgi
vu2012 29436 31.6 0.2 82100 9000 ? R 06:23 47:01 /usr/bin/php5-cgiThe problem is that it uses a lot of cpu. I could kill them manually, but this wont stop it from happening again. Server has an uptime for 59 days and I didnt change anything but it started yesterday. I rebootet the server and I have the same problem today (yesterday there where a lot more processes, the server had a load average of 22 - 4gb ram amd 2 cpus debian etch, ispcp 1.0.6).
All the processes belong to the same virtual host.
Any ideas how to prevend this from happening?
RE: php5-cgi huge memory usage - pgentoo - 10-30-2010 06:56 AM
Is the website that is hosted on that account getting tons of traffic? That would be my first thing to check. Maybe the load isn't caused by "a problem", but more a result of increased traffic.
RE: php5-cgi huge memory usage - Kwik - 10-30-2010 08:09 AM
The traffic is pretty much the same. Seems to me that a few processes just dont stop running.
RE: php5-cgi huge memory usage - kilburn - 10-30-2010 05:27 PM
Use "strace" to see what are the processes doing.
Something similar happened to me once, and it was a silly programing mistake. Basically, the website had an "admin area" where the website owner could add/remove ad banners, and then two of them were shown randomly. At some point, the owner decided to remove all the banners but one, so the website ended up looping indefinitely trying to chose the second one.
RE: php5-cgi huge memory usage - kassah - 10-31-2010 01:28 AM
Isn't that what php execution time limit is for? or did he disable that?
RE: php5-cgi huge memory usage - kilburn - 11-02-2010 06:02 AM
Yes and no. The default time limit is 30s, so if you have more than one request every 30s the process count will keep rising and rising until your server is starved.