hi all,
i just switched from mod_php to mod_fcgid as we have a
multi-user-webserver and i wanted to use the benefits of per-user
executuion of php-scripts.
now we have huge problems with the stability of the webserver.
it's a multi-user-webserver (ubuntu 10.04.2, Apache/2.2.14,
apache2-suexec 2.2.14-5, libapache2-mod-fcgid 2.3.4-2)
the server has 16 GB RAM
after stating the webserver, 10GB of ram are immediately consumed.
after running some minutes, some applications are also unavailable
before getting to the ram-limit, with error 500., for example :
call /data/homewww/user1/webdir/events/index.php with wrapper
/data/homewww/user1/webdir/cgi/php.fcgi
[notice] mod_fcgid: process
/data/homewww/user1/webdir/index.html(27558) exit(communication
error), terminated by calling exit(), return code: 254
later (15-20min) the ram ist almost full and most of the
php-applications are not available anymore.
in the apache error.log i can then see the following error:
Connection reset by peer: mod_fcgid: error reading data from FastCGI server
[error] [client x.x.x.x] Premature end of script headers: index.php
I then need to restart the apache-server. after restart immediately 10
GB of ram are used. there are bwetwenn 150-250 php-cgi processes.
this is my fcgid.conf:
FcgidConnectTimeout 20
PHP_Fix_Pathinfo_Enable 1
MaxRequestsPerProcess 10000
IdleTimeout 60
IdleScanInterval 30
BusyTimeout 300
BusyScanInterval 120
ErrorScanInterval 6
ZombieScanInterval 6
ProcessLifeTime 60
SpawnScoreUpLimit 150
SpawnScore 1
TerminationScore 2
MaxProcessCount 500
IPCConnectTimeout 30
IPCCommTimeout 30
DefaultMinClassProcessCount and DefaultMaxClassProcessCount are commented out
in my top i see something like this:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3510 user1 20 0 134m 10m 5472 S 35 0.1 0:07.07 php-cgi
4402 user2 20 0 157m 22m 13m S 16 0.1 0:01.29 php-cgi
3619 user3 20 0 153m 20m 15m S 6 0.1 0:01.28 php-cgi
3609 user4 20 0 144m 21m 5632 S 4 0.1 0:00.39 php-cgi
[..]
3623 userN 20 0 140m 18m 5708 S 4 0.1 0:00.47 php-cgi
the fcgid-wrapper-script for each user looks like this:
#!/bin/sh
PHPRC="/data/homewww/user1/conf/"
export PHPRC
export TMPDIR=/data/homewww/user1/tmp
PHP_FCGI_CHILDREN=0
export PHP_FCGI_CHILDREN
PHP_FCGI_MAX_REQUESTS=10000
export PHP_FCGI_MAX_REQUESTS
exec /opt/php/php-5.2/bin/php-cgi
this is my apache2.conf:
<IfModule mpm_worker_module>
StartServers 2
MinSpareThreads 25
MaxSpareThreads 75
ThreadLimit 64
ThreadsPerChild 25
MaxClients 150
MaxRequestsPerChild 0
</IfModule>
one thing i thought it could be the reason ist the value
"memory_limit" in the per-user php.ini
currently it is set to 64M. i already tried to reduce this value but
then some of the applications dont wotrk (typo3 for example)
a also have aeccelerator enabled for each user. could this be the reason?
this is the relevant configration in php.ini:
extension=eaccelerator.so
eaccelerator.shm_size="16"
eaccelerator.cache_dir="/var/cache/eaccelerator"
eaccelerator.enable="1"
eaccelerator.optimizer="1"
eaccelerator.check_mtime="1"
eaccelerator.debug="0"
eaccelerator.filter=""
eaccelerator.shm_max="0"
eaccelerator.shm_ttl="0"
eaccelerator.shm_prune_period="0"
eaccelerator.shm_only="0"
eaccelerator.compress="1"
eaccelerator.compress_level="9"
can someone please please give me some advices how to tune the values
PLEASE, currentlx i have no clue what to do.
regards, lowshoe
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