Re: build farm machine using <make -j 8> mixed results

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Peter Eisentraut <peter_e(at)gmx(dot)net>, Robert Creager <robert(at)logicalchaos(dot)org>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: build farm machine using <make -j 8> mixed results
Date: 2012-09-08 20:52:03
Message-ID: 504BAFF3.3000102@dunslane.net
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On 09/08/2012 04:46 PM, Tom Lane wrote:
> Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
>> Scratch that theory, that was just a transient. If anything it looks
>> like it is related to system load. When almost nothing was running on
>> the machine it worked fine. When I started up a Browser and an MUA the
>> problem occurred. This VM has 4 CPUs and 4Gb of memory and a load
>> average around 0.4 right now. I'm a bit perplexed.
> Hm ... you weren't using the -l (--max-load) option were you? That
> would make system load affect gmake's scheduling. Although it's clear
> when I test it that it is waiting for the bison run to finish before
> launching the dependent builds, so it still seems like it must be a bug
> if your copy isn't waiting for that.
>
>

No. just "make -j 4"

And it's the stock Fedora build of make.

cheers

andrew

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