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Đếm các tiến trình Httpd: ps aux | grep 'httpd' | awk '{print $6/1024 " MB";}' Tính Trung bình

ps aux | grep 'httpd' | awk '{print $6/1024;}' | awk '{avg += ($1 - avg) / NR;} END {print avg " MB";}'

Here's what I've done to 'solve' it:

1. Set MaxClients 7 (based on (1740.8Mb Memory on server - 900Mb for MySQL + other stuff) / 111Mb average usage per httpd process = 7.5747747747747747747747747747748)

Therefore:

<IfModule prefork.c>
StartServers       8
MinSpareServers    5
MaxSpareServers   20
ServerLimit      256
MaxClients         7
MaxRequestsPerChild  4000
</IfModule>

2. Disable all Apache modules except for authz_host_module, log_config_module, expires_module, deflate_module, setenvif_module, mime_module, autoindex_module, negotiation_module, dir_module, alias_module, rewrite_module, php5_module
3. Remove the mod_ssl package since the client isn't using https:// whatsoever.

I'll report back once this new configuration has been running a while to see if this solves it.

Some inspiration here was borrowed from: http://www.activoinc.com/blog/2009/08/31/performance-optimized-httpd-conf-for-magento-ecommerce/ and http://www.activoinc.com/downloads/httpd.conf-magento    

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