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vacuum full 100 mins plus?

From: Patrick Hatcher <PHatcher(at)macys(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: vacuum full 100 mins plus?
Date: 2004-07-14 21:29:48
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance

Should I be concerned that my vacuum process has taken upwards of 100 +
minutes to complete?  I dropped all indexes before starting and also
increased the vacuum_mem before starting.
Looking at the output below, it appears that a vacuum full hasn't been done
on this table for quite sometime.  Would I be better off exporting the data
vacuuming the table and reimporting the data?  I cannot drop the table do
to views attached to the table

mdc_oz=# set vacuum_mem = 10240;
mdc_oz=# vacuum full verbose cdm.cdm_ddw_Tran_item;
INFO:  vacuuming "cdm.cdm_ddw_tran_item"
INFO:  "cdm_ddw_tran_item": found 15322404 removable, 10950460 nonremovable
row versions in 934724 pages
DETAIL:  0 dead row versions cannot be removed yet.
Nonremovable row versions range from 233 to 308 bytes long.
There were 1081 unused item pointers.
Total free space (including removable row versions) is 4474020460 bytes.
544679 pages are or will become empty, including 0 at the end of the table.
692980 pages containing 4433398408 free bytes are potential move
CPU 29.55s/4.13u sec elapsed 107.82 sec.

Patrick Hatcher


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