Re: [PERFORM] [HACKERS] More benchmarking of wal_buffers - Mailing list pgsql-advocacy

From Tom Lane
Subject Re: [PERFORM] [HACKERS] More benchmarking of wal_buffers
Date
Msg-id 3914.1045196089@sss.pgh.pa.us
Whole thread Raw
In response to Re: [PERFORM] [HACKERS] More benchmarking of wal_buffers  (Kevin Brown <kevin@sysexperts.com>)
List pgsql-advocacy
Kevin Brown <kevin@sysexperts.com> writes:
> What happens when the only transaction running emits more WAL log data
> than wal_buffers can handle?  A flush happens when the WAL buffers
> fill up (that's what I'd expect)?  Didn't find much in the
> documentation about it...

A write, not a flush (ie, we don't force an fsync).  Also, I think it
writes only a few blocks, not all the available data.  Don't recall the
details on that.

            regards, tom lane

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