From: Luke Lonergan <llonergan@greenplum.com>
To: mark@mark.mielke.cc
Cc: Steinar H. Gunderson <sgunderson@bigfoot.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: [HACKERS] A Better External Sort?
Date: Fri, 07 Oct 2005 21:20:59 -0700
Message-ID: <BF6C973B.10E2B%llonergan@greenplum.com> (raw)
In-Reply-To: <20051008001704.GA11677@mark.mielke.cc>
Mark,
On 10/7/05 5:17 PM, "mark@mark.mielke.cc" <mark@mark.mielke.cc> wrote:
> On Fri, Oct 07, 2005 at 04:55:28PM -0700, Luke Lonergan wrote:
>> On 10/5/05 5:12 PM, "Steinar H. Gunderson" <sgunderson@bigfoot.com> wrote:
>>> What? strlen is definitely not in the kernel, and thus won't count as
>>> system time.
>> System time on Linux includes time spent in glibc routines.
>
> Do you have a reference for this?
>
> I believe this statement to be 100% false.
How about 99%? OK, you're right, I had this confused with the profiling
problem where glibc routines aren't included in dynamic linked profiles.
Back to the statements earlier - the output of time had much of time for a
dd spent in system, which means kernel, so where in the kernel would that be
exactly?
- Luke
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To: pgsql-performance@postgresql.org
Cc: llonergan@greenplum.com, mark@mark.mielke.cc, sgunderson@bigfoot.com
Subject: Re: [HACKERS] A Better External Sort?
In-Reply-To: <BF6C973B.10E2B%llonergan@greenplum.com>
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