Date: Thu, 14 Jul 2011 12:33:58 +0200 From: Guido Falsi <mad@madpilot.net> To: Tom Evans <tevans.uk@googlemail.com> Cc: freebsd-stable@freebsd.org, Subbsd <subbsd@gmail.com> Subject: Re: watchdog timeout for pwait/rc.shutdown Message-ID: <20110714103358.GC50321@megatron.madpilot.net> In-Reply-To: <CAFHbX1KgFN=qQ99PKVpOif4Ta4t_%2B0dukg-Hu=TybLWXdRV2EQ@mail.gmail.com> References: <CAFt_eMrs-uR5wLtSHews9FYxBZmvW2i02fiZ0ff947NLWjM4Pg@mail.gmail.com> <CAFHbX1KgFN=qQ99PKVpOif4Ta4t_%2B0dukg-Hu=TybLWXdRV2EQ@mail.gmail.com>
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On Thu, Jul 14, 2011 at 11:24:04AM +0100, Tom Evans wrote: > 2011/7/14 Subbsd <subbsd@gmail.com>: > > Hi > > > > Tell me please, is it possible to change the behavior of shutdown > > sequence to avoid work of kill process (or increase timeout). > > > > ??ot always process can not react to signals and stop - for example, > > heavy MySQL server databases or databases/redis - can not keep up with > > 30 seconds to correct shutdown. > > In my example noSQL product - redis holds a 10 GB RAM memory and when > > stop it just did not have time to reset the state to disk when i stop > > process or jail with redis. > > As result ive have in /var/db/redis "dump.tmp.XX" - broken DB about ~3 > > Gb instead of 10 GB. > > > > > > Waiting for PIDS: 47924 > > 30 second watchdog timeout expired. Shutdown terminated. > > Thu Jul 14 16:24:30 MSD 2011 > > Killed > > > > PS: I may be mistaken but I think this problem did not exist before > > PS2: i have RELENG_8 and HEAD version of FreeBSD > > PS3: Thanks in advance > > I have roughly the same problem when I shut down my laptop, squid > takes at least 1 minute to shut down, so if I shutdown or restart > without stopping squid first, then all my processes just get killed > rather than shutdown cleanly by their rc script. An option to > vary/disable the timeout would be welcome. squid by default waits 30 seconds before closing to give time to clients to close their connections. This is a very conservative value needed for big proxies. If you're using squid just to serve the local machine or a not so big network you can greatly lower this value, setting it to 5 or 10 seconds, or even less and have squid take much less time to stop. the configuration directive you should look at is "shutdown_lifetime" -- Guido Falsi <mad@madpilot.net>
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