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Re: pgbench internal contention

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: pgbench internal contention
Date: 2011-07-30 06:32:21
Message-ID: 12232.1312007541@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> On Fri, Jul 29, 2011 at 5:25 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> Portability, or rather lack of it. What about using erand48, which we
>> already have a dependency on (and substitute code for)?

> Neither our implementation nor glibc's appears to be thread-safe,

I think you're confusing srand48 with erand48.  The latter relies on a
caller-supplied state value, so if it's not thread-safe the caller has
only itself to blame.

			regards, tom lane

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