Re: need to speed up query

Justin --

You wrote:
>
> i've had to write queries to get trail balance values out of the GL
> transaction table and i'm not happy with its performance
>
>
> The table has 76K rows growing about 1000 rows per working day so the
> performance is not that great it takes about 20 to 30 seconds to get all
> the records for the table and when we limit it to single accounting
> period it drops down to 2 seconds

So 30 seconds for 76 days (roughly) worth of numbers ? Not terrible but not great.

> Here is the query and explain . PostgreSql is 8.3.1 on new server with
> raid 10 Serial SCSI.
<... snipped 'cause I have a lame reader ...>

> " Sort Method: quicksort Memory: 292kB"
<...snip...>
> "Total runtime: 24682.580 ms"

I don't have any immediate thoughts but maybe you could post the table schemas and indexes. It looks to my untutored eye as if most of the estimates are fair so I am guessing that you have run analyze recently.

What is your sort memory set to ? If work_mem is too low then you'll go to disk (if you see tmp files under the postgres $PGDATA/base directory you might be seeing the result of this) ...

HTH

Greg Williamson
Senior DBA
DigitalGlobe

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