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Have 2 Apache IBM HTTP servers with the following settings

ThreadLimit 150

ServerLimit 8

MaxClients 1200

ThreadsPerChild 150

The server has 8 core and 24 Gig Ram (Linux box) I'm looking at increasing the maxclient values. What all are the things I should be considering ?

Also when I do ss -s

Transport Total IP IPv6

  • 1243 - -

RAW 0 0 0

UDP 20 15 5

TCP 836 803 33

INET 856 818 38

FRAG 0 0 0

Does the TCP Total value (836) correspond to the Maxclients setting.?

Thanks

user3330435
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1 Answers1

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There is no real correspondence. MaxClients is the maximum number of concurrent threads Apache will use. If Apache only ever handled static files, the share of open sockets on Apache's port would be roughly capped by MaxClients.

But backend connections and connection pooling mean you could have far more open sockets than threads (maxclients).

1200 is pretty modest, 2000-3000 is still reasonable.

You can chart the usage via mod_mpmstats.

covener
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