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Logging temp file useage ... a little advice would be appreciated

From: Bill Moran <wmoran(at)collaborativefusion(dot)com>
To: hackers(at)postgresql(dot)org
Subject: Logging temp file useage ... a little advice would be appreciated
Date: 2006-12-29 22:53:38
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
So I've got this patch (attached, against 8.2)

The goal is to track temp file usage as an aid to server tuning (such as

Most of the patch seems to work just dandy, except I'm getting weird
sizes reported:

2006-12-29 17:46:21 EST [45558]: [575-1] LOG:  temp file: size 140737488343776 path base/32861/pgsql_tmp/pgsql_tmp45558.554

Seems a bit odd to have a 140T file on a 130G partition ...

I'm working on a FreeBSD 6.2 amd64 system.  The headers show stat.st_size to
be of type off_t, which appears to be a 64-bit int.  I figured that %ld
would be the correct format.

Am I hitting something such as file sparseness?  Is this entire endeavour
doomed from the start?  Or am I just making some sort of dumb mistake?

Any pointers are welcome.

Bill Moran
Collaborative Fusion Inc.

Attachment: trace_log_files.diff
Description: text/x-diff (1.3 KB)


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