Re: Takes too long to fetch the data from database - Mailing list pgsql-performance

Richard Huxton <dev@archonet.com> writes:
> soni de wrote:
>> NOTICE:  QUERY PLAN:
>> Sort  (cost=17.13..17.13 rows=1 width=16) (actual time=619140.18..619140.29rows
>> =288 loops=1)
>> ->  Index Scan using lan_pkey on lan  (cost=0.00..17.12 rows=1 width=16)
>> (actual time=7564.44..619121.61 rows=288 loops=1)
>>
>> Total runtime: 619140.76 msec

> OK - there is clearly something wrong here when you take 10 minutes to
> fetch 288 rows from an index.

> I'm guessing you have a *lot* of dead rows in there.

Yeah.  The other small problem here is that EXPLAIN output hasn't looked
like that since PG 7.2 (unless Soni has just omitted the index-condition
lines).  I'd recommend updating to something modern.

            regards, tom lane