Обсуждение: Setting vacuum_mem for vacuumdb utility

I just discovered that the use of a much larger setting on vacuum_mem
has a joyous effect on the throughput of VACUUM FULL for some of our
tables. However, all of my maintenance scripts use "vacuumdb" (the
command-line utility) instead of psql. How can I set vacuum_mem for the
duration of the vacuumdb command's execution?



--
Jeff Boes                                      vox 269.226.9550 ext 24
Database Engineer                                     fax 269.349.9076
Nexcerpt, Inc.                                 http://www.nexcerpt.com
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Jeff Boes wrote:
> I just discovered that the use of a much larger setting on vacuum_mem
> has a joyous effect on the throughput of VACUUM FULL for some of our
> tables. However, all of my maintenance scripts use "vacuumdb" (the
> command-line utility) instead of psql. How can I set vacuum_mem for the
> duration of the vacuumdb command's execution?

Sure, set it in postgresql.conf.

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  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
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Bruce Momjian wrote:

>Jeff Boes wrote:
>
>
>>I just discovered that the use of a much larger setting on vacuum_mem
>>has a joyous effect on the throughput of VACUUM FULL for some of our
>>tables. However, all of my maintenance scripts use "vacuumdb" (the
>>command-line utility) instead of psql. How can I set vacuum_mem for the
>>duration of the vacuumdb command's execution?
>>
>>
>
>Sure, set it in postgresql.conf.
>
>
>
You can also modify the vacuumdb script.  I just added a set call to the
script to set the memory to a high value when vacuuming and reset it
back to normal when finished so I don't take extra memory away from the
server.