Difference between revisions of "Apache/performance"
< Apache
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=== Cli === | === Cli === | ||
<source lang='bash'> | <source lang='bash'> | ||
− | # Using wget isn't advised because you'll get html output | + | # Using wget isn't advised because you'll get html output. However, if you simply append the ?auto querystring, you'll get machine readable output. |
wget http://localhost/server-status -O - | wget http://localhost/server-status -O - | ||
+ | curl localhost/server-status?auto | ||
# Ubuntu | # Ubuntu | ||
apache2ctl fullstatus | apache2ctl fullstatus | ||
Line 13: | Line 14: | ||
Or you can edit <code>/mods.enabled/status</code> to get it from the browser. For a machine readable, condensed version, just append the '''auto''' querystring argument: | Or you can edit <code>/mods.enabled/status</code> to get it from the browser. For a machine readable, condensed version, just append the '''auto''' querystring argument: | ||
e.g. http://example.com/server-status?auto | e.g. http://example.com/server-status?auto | ||
+ | |||
+ | == Killing Stuck Processes == | ||
+ | [http://giantdorks.org/alain/script-to-individually-terminate-stuck-web-server-threads-without-restarting-apache/ This script from Alain Kelder] shows how you can identify and kill long-running processes without restarting Apache. I ran into this problem with a misbehaving Mantis plugin. | ||
+ | <source lang="bash"> | ||
+ | #/bin/bash | ||
+ | |||
+ | GetAllWorkers() | ||
+ | { | ||
+ | AllWorkers=$(apache2ctl fullstatus | awk '/^Srv /,/^$/ {print}') | ||
+ | } | ||
+ | |||
+ | GetStuckWorkers() | ||
+ | { | ||
+ | StuckWorkers=$(echo "$AllWorkers" | awk '$4 == "W" && $6 > 60 && $7 == 0 && $8 == "0.0" {print}') | ||
+ | header=$(echo "$AllWorkers" | head -n 1) | ||
+ | } | ||
+ | |||
+ | GetStuckPIDs() | ||
+ | { | ||
+ | StuckPIDs=$(echo "$AllWorkers" | awk '$4 == "W" && $6 > 60 && $7 == 0 && $8 == "0.0" {print$2}') | ||
+ | } | ||
+ | |||
+ | Show() | ||
+ | { | ||
+ | echo "--------------------------------" | ||
+ | echo " Stopped on $(date +%F\ %T)" | ||
+ | echo "--------------------------------" | ||
+ | echo "$header" | ||
+ | echo "$StuckWorkers" | ||
+ | } | ||
+ | |||
+ | GetAllWorkers && GetStuckPIDs | ||
+ | if [ -n "$StuckPIDs" ]; then | ||
+ | for PID in $StuckPIDs; do | ||
+ | echo stopping $PID with SIGTERM | ||
+ | kill $PID | ||
+ | done | ||
+ | GetStuckWorkers | ||
+ | Show | mail -s "$(basename $0) executed on $(hostname -s)" root | ||
+ | Show >> /path/to/ksaw.log | ||
+ | fi | ||
+ | </source> | ||
== Resources == | == Resources == | ||
# https://httpd.apache.org/docs/2.4/misc/perf-tuning.html | # https://httpd.apache.org/docs/2.4/misc/perf-tuning.html | ||
# https://www.linode.com/docs/websites/apache-tips-and-tricks/tuning-your-apache-server | # https://www.linode.com/docs/websites/apache-tips-and-tricks/tuning-your-apache-server | ||
+ | |||
+ | [[Category:Apache]] | ||
+ | [[Category:Webserver]] | ||
+ | [[Category:Bash]] | ||
+ | [[Category:System Administration]] | ||
+ | [[Category:Performance]] |
Latest revision as of 10:01, 2 May 2024
Get Stats
To get statistics, you'll need to potentially modify your Apache configuration. For Ubuntu, it's as easy as a2enmod status
(and reload the server with service apache2 reload
)
Cli
# Using wget isn't advised because you'll get html output. However, if you simply append the ?auto querystring, you'll get machine readable output.
wget http://localhost/server-status -O -
curl localhost/server-status?auto
# Ubuntu
apache2ctl fullstatus
# Older/RedHat
apachectl fullstatus
Or you can edit /mods.enabled/status
to get it from the browser. For a machine readable, condensed version, just append the auto querystring argument:
e.g. http://example.com/server-status?auto
Killing Stuck Processes
This script from Alain Kelder shows how you can identify and kill long-running processes without restarting Apache. I ran into this problem with a misbehaving Mantis plugin.
#/bin/bash
GetAllWorkers()
{
AllWorkers=$(apache2ctl fullstatus | awk '/^Srv /,/^$/ {print}')
}
GetStuckWorkers()
{
StuckWorkers=$(echo "$AllWorkers" | awk '$4 == "W" && $6 > 60 && $7 == 0 && $8 == "0.0" {print}')
header=$(echo "$AllWorkers" | head -n 1)
}
GetStuckPIDs()
{
StuckPIDs=$(echo "$AllWorkers" | awk '$4 == "W" && $6 > 60 && $7 == 0 && $8 == "0.0" {print$2}')
}
Show()
{
echo "--------------------------------"
echo " Stopped on $(date +%F\ %T)"
echo "--------------------------------"
echo "$header"
echo "$StuckWorkers"
}
GetAllWorkers && GetStuckPIDs
if [ -n "$StuckPIDs" ]; then
for PID in $StuckPIDs; do
echo stopping $PID with SIGTERM
kill $PID
done
GetStuckWorkers
Show | mail -s "$(basename $0) executed on $(hostname -s)" root
Show >> /path/to/ksaw.log
fi