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Here is the graph from munin that might help munin graoh

and also here is my http.conf:

<IfModule prefork.c>
StartServers       8
MinSpareServers    5
MaxSpareServers   40
ServerLimit      2048
MaxClients       2048
MaxRequestsPerChild  8000
</IfModule>

PHP generate page in few milliseconds but I don't know why client cant receive it properly. And you also see the connections graph witch has fell in last minutes. I was not able to load almost any page on my website in that moment.

perror
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Mehdi Azizi
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1 Answers1

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What I see from network point of view is too many TIME_WAIT=9.76K(I am not sure what is assured means).time_wait is a condition when your system is run out of socket because of many tcp connection are repeatedly open and closed.You can confirm it using netstat -an.You can tune these parameters 

             net.ipv4.tcp_timestamps = 1
             net.ipv4.tcp_tw_recycle = 1

tcp_tw_recycle - BOOLEAN
Enable fast recycling TIME-WAIT sockets. Default value is 0.
It should not be changed without advice/request of technical
experts. Enabling this option is not recommended since this causes problems when working with NAT(Network Address Translation).

tcp_tw_reuse - BOOLEAN
Allow to reuse TIME-WAIT sockets for new connections when it is
safe from protocol viewpoint. Default value is 0.
It should not be changed without advice/request of technical
experts.

But before that take a tcpdump and check the new connection,also check with your application team if these many connection are desired.

Prashant Lakhera
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