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mottalrd
PostPosted: Tue Dec 27, 2011 10:55 am 
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Hi everybody,
according to the Apache MaxClients directive connection attempts over the MaxClients limit will normally be queued, up to a number based on the ListenBacklog directive.

How could I monitor the size of this queue?

thank you :roll:
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hoopycat
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PostPosted: Tue Dec 27, 2011 12:17 pm 
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I'm guessing they would show in 'netstat -nt' as being in state SYN_RECV.
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mottalrd
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PostPosted: Tue Dec 27, 2011 12:48 pm 
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I'm guessing they would show in 'netstat -nt' as being in state SYN_RECV


Perfect, thus decreasing the maximum number of Apache clients I should see the queue growing, right?
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hoopycat
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PostPosted: Tue Dec 27, 2011 2:35 pm 
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You will probably see the number of ESTABLISHED sockets approach MaxClients (+/- a few), then the number of SYN_RECV will creep up from there. You'll also get a notice in Apache's error log when it hits MaxClients.

And when it happens because someone didn't use CDN URLs in a newsletter, :shock:
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mottalrd
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PostPosted: Thu Dec 29, 2011 10:37 am 
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thank you for your clarifications, they were really helpful
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