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From Igor Galić <i.ga...@brainsware.org>
Subject Re: Too many CLOSE_WAIT on client connections
Date Sat, 05 Jan 2013 09:17:15 GMT


----- Original Message -----
> On 1/3/13 12:36 AM, Vladyslav Bachynskyi wrote:
> > Hi,
> > I've Found the root cause.
> > I have had to many CLOSE_WAIT connections because I've set
> > proxy.config.http.transaction_active_timeout_in to 0.
> > By changing this variable the issue has been solved.
> > I thought, as such connections are not active, they should be fully
> > closed even without transaction_active_timeout_in...
> 
> Hmmmm. That seems somewhat odd that it'd help. It'd be interesting to
> look
> into why (that setting is necessary to keep at 0 for e.g. very large
> files
> (streaming media for example, or YouTube proxy/caching). Or
> alternatively,
> keep it very large (certainly much larger than 120s). What did you
> set it to ?
> 
> What is the problem having connections in CLOSE_WAIT anyways? The
> kernel
> should clean that out after some time (like 120s or some such), no?

The issue is that your re-use of ports taking that long.
That could become a bottleneck very busy sites.

Most servers mitigate this by advising the kernel to reuse ports.

> -- Leif

i 

-- 
Igor Galić

Tel: +43 (0) 664 886 22 883
Mail: i.galic@brainsware.org
URL: http://brainsware.org/
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