Re: Latches, signals, and waiting

Fujii Masao <masao.fujii@gmail.com>

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From: Fujii Masao <masao.fujii@gmail.com>

To: Tom Lane <tgl@sss.pgh.pa.us>

Cc: Heikki Linnakangas <heikki@enterprisedb.com>, pgsql-hackers@postgresql.org

Date: 2010-09-16T04:47:52Z

Lists: pgsql-hackers

Attachments

signal_handler_wakeup_recovery_v1.patch (application/octet-stream) patch v1

On Wed, Sep 15, 2010 at 10:55 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> So I'm wondering if we couldn't eliminate the five-second sleep
> requirement here too.

That would make the shutdown time longer since startup process currently
cannot respond to SIGTERM and SIGHUP immediately. To avoid this, I think
that we should change the signal handlers of startup process so that they
call WakeupRecovery.

The attached patch makes StartupProcSigHupHandler and StartupProcShutdownHandler
call WakeupRecovery.

Regards,

-- 
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center