Re: VACUUM process running for a long time

On Wednesday 14 April 2010 16.01:39 Jan Krcmar wrote:

> the documentation says, one should run VACUUM if there are many
> changes in the database, but the vacuumdb never finishes sooner than
> the new data should be imported.
> 
> is there any technique that can solve this problem?

 -> vacuum can run concurrently to other stuff, so it's not necessary to 
wait before it finishes.
 -> in most cases, autovacuum should do the Right Thing(tm) atomatically, so 
you should not need to call vacuum manually.

This is with a recent pg version.  Do you use a (very) old version with 
autovacuum?  Is your db server running hot and can't really keep up with 
inserting data as soon as vacuum starts running?

Note that the pg documentation contains lots of useful information about 
tuning autovacuum.  Without knowing how your table looks and how your data 
entry happens (in peaks?  or always at about the same rate?) we probably 
can't help you much more.

cheers
-- vbi



> 
> thanks
> fous

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