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Re: BUG #2576: tcp_keepalive doesn't work

From: Fujii Masao <fujii(dot)masao(at)oss(dot)ntt(dot)co(dot)jp>
To: pgsql-bugs(at)postgresql(dot)org
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Subject: Re: BUG #2576: tcp_keepalive doesn't work
Date: 2006-08-18 09:32:05
Message-ID: 44E58915.5090202@oss.ntt.co.jp (view raw or flat)
Thread:
Lists: pgsql-bugs
Hi.

I found the cause of the error that tcp_keepalive doesn't work.
The cause is a specification of linux kernel.

In the specification of linux kernel, tcp_keepalive doesn't work
if the network outage occurs before receiving ACK for send() system-call.
This behavior of tcp_keepalive is reported even by LKML.

Linux-Kernel Archive: Re: 2.6.12.5 bug? per-socket TCP keepalive settings
http://www.ussg.iu.edu/hypermail/linux/kernel/0508.2/0757.html


I'm confused whether tcp_keepalive problem should be solved
at the DB level.


regards;


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