{"id":2554,"date":"2015-03-06T09:52:26","date_gmt":"2015-03-06T08:52:26","guid":{"rendered":"http:\/\/blog.fh-kaernten.at\/wehr\/?p=2554"},"modified":"2015-03-06T11:02:31","modified_gmt":"2015-03-06T10:02:31","slug":"tune-apache-mpm-prefork-with-some-webminstats","status":"publish","type":"post","link":"https:\/\/blog.fh-kaernten.at\/wehr\/2015\/03\/06\/tune-apache-mpm-prefork-with-some-webminstats\/","title":{"rendered":"Tune Apache-MPM prefork with some Webminstats"},"content":{"rendered":"

A couple of days ago I started to do some optimizations on our server backends. Most of them are Apache-Prefork PHP powered.<\/p>\n

One part of doing Apache-Tuning is to play around with the MPM configuration:<\/p>\n

\r\n<ifmodule prefork.c>\r\n  StartServers       4\r\n  MinSpareServers    3\r\n  MaxSpareServers   10\r\n  ServerLimit      256\r\n  MaxClients       256\r\n  MaxRequestsPerChild  10000\r\n<\/ifmodule>\r\n<\/pre>\n
The particular configuration setting for Apache can be found in the file \/etc\/apache\/httpd.conf<\/code><\/p>\n
I’m using Webmin->Sysstats to get some basic data where I can start from.<\/p>\n
First I wanted to know the average<\/em> and total<\/em> memory usage of the apache worker process(es).<\/p>\n
\"ApacheMemStat\"<\/a>
Apache memory consumption (total, per worker)<\/figcaption><\/figure>\n
As you can see after a few days you get a clew about how our worker memory consumption behaves.<\/p>\n
Especially the per worker chart is import which gives you a hint for the MaxClients and ServerLimit settings.<\/p>\n
The used bash script :<\/p>\n
\r\n-getApachePerWorkerMem)\r\n   ps -ylC apache2 | awk '{x += $8;y += 1} END {print x\/((y-1)*1024)}';;\r\n-getApacheTotalMemPercent)\r\n   sys_mem=`free -m | awk 'NR==2{print $2 }'`\r\n   apache_total_mem=`ps -ylC apache2 | awk '{x += $8;y += 1} END {print x\/1024;}'`\r\n   echo "scale=2;$apache_total_mem\/($sys_mem\/100)" | bc;;\r\n<\/pre>\n
Another important part\u00a0is the relation of idle<\/em> and busy <\/em>workers.<\/p>\n
\"Apache<\/a>
Apache amount and relation of busy\/idle workers<\/figcaption><\/figure>\n
Here we see that in this particular case we have an average ratio 10\/2 (idle<\/em>\/busy<\/em>) and our max is about (11\/7) which gives\u00a0a balanced amount of idle<\/em> and busy workers.<\/em><\/p>\n
The used bash script :<\/p>\n
\r\n-getApacheBusyWorker)\r\n  echo `wget -q -O - "$URL" --user="$USER" --password=$PASS |grep BusyWorker |cut -d" " -f2`;;\r\n-getApacheIdleWorker)\r\n  echo `wget -q -O - "$URL" --user="$USER" --password=$PASS |grep IdleWorker |cut -d" " -f2`;;\r\n<\/pre>\n
have fun<\/p>\n
Mario<\/p>\n","protected":false},"excerpt":{"rendered":"
A couple of days ago I started to do some optimizations on our server backends. Most of them are Apache-Prefork PHP powered. One part of doing Apache-Tuning is to play around with the MPM configuration: <ifmodule prefork.c> StartServers 4 MinSpareServers 3 MaxSpareServers 10 ServerLimit 256 MaxClients 256 MaxRequestsPerChild 10000 <\/ifmodule> The particular configuration setting for … Continue reading Tune Apache-MPM prefork with some Webminstats<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"ngg_post_thumbnail":0,"footnotes":""},"categories":[9],"tags":[],"class_list":["post-2554","post","type-post","status-publish","format-standard","hentry","category-linux-stuff"],"_links":{"self":[{"href":"https:\/\/blog.fh-kaernten.at\/wehr\/wp-json\/wp\/v2\/posts\/2554","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.fh-kaernten.at\/wehr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.fh-kaernten.at\/wehr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.fh-kaernten.at\/wehr\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.fh-kaernten.at\/wehr\/wp-json\/wp\/v2\/comments?post=2554"}],"version-history":[{"count":0,"href":"https:\/\/blog.fh-kaernten.at\/wehr\/wp-json\/wp\/v2\/posts\/2554\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.fh-kaernten.at\/wehr\/wp-json\/wp\/v2\/media?parent=2554"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.fh-kaernten.at\/wehr\/wp-json\/wp\/v2\/categories?post=2554"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.fh-kaernten.at\/wehr\/wp-json\/wp\/v2\/tags?post=2554"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}