pg_dump issue - Mailing list pgsql-performance

From mcelroy, tim
Subject pg_dump issue
Date
Msg-id 9765373733A7DF4681B12225D2FC44050D6D0C@bosexprod001.bostonstock.local
Whole thread Raw
Responses Re: pg_dump issue  (Tom Lane <tgl@sss.pgh.pa.us>)
Re: pg_dump issue  (Evgeny Gridasov <eugene@i-free.ru>)
List pgsql-performance

Good morning,

I have identical postgres installations running on identical machines.  Dual Core AMD Opteron(tm) Processor 870 , 16GB RAM, Red Hat Linux 3.2.3-20 and 120GB worth of disk space on two drives.

Recently, I have noticed that my nightly backups take longer on one machine than on the other.  I back up five (5) databases totaling 8.6GB in size.  On Prod001 the backups take app. 7 minutes, on Prod002 the backups take app. 26 minutes!  Quite a discrepancy.  I checked myself than checked with our Engineering staff and have been assured that the machines are identical hardware wise, CPU, disk, etc. 

Question; has anyone run into a similar issue?  Here is the command I use for the nightly backup on both machines:

pg_dump -F c -f $DB.backup.$DATE $DB

Kind of scratching my head on this one....

Thank you,
Tim McElroy

pgsql-performance by date:

Previous
From: Mario Splivalo
Date:
Subject: Speedup hint needed, if available? :)
Next
From: Tom Lane
Date:
Subject: Re: Speedup hint needed, if available? :)