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

On 09/08/2012 04:52 PM, Andrew Dunstan wrote:
>
> 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.

I have just repeated this on an absolutely fresh up to date F17 machine,
with no symlink stuff in play.

Steps to recreate:

CC="ccache gcc" ../postgres/configure --enable-depend --enable-debug
--enable-cassert --with-perl --with-python --with-tcl --with-libxml
--with-libxslt -with-openssl --with-gssapi --with-pam --with-ldap
make -j 4

cheers

andrew

q