Re: Bytea poor performance

Hello,

How about some explain analyze output?
  Explain analyse select * from files where nr > 1450

  "Index Scan using pk on files  (cost=0.00..3.67 rows=50 width=36)
  (actual time=0.000..0.000 rows=50 loops=1)"

Have you done a full vacuum lately? How about reindexing?
  Yes, I did reindexing and vacuum full just before query..




> On 10/15/05 9:20 AM, "NSO" <nso@fmf.vtu.lt> wrote:
>
>> Hello,
>>
>> I am trying to select form table with bytea field. And queries runs very
>> slow.
>> My table:
>> CREATE TABLE files (file bytea, nr serial NOT NULL) WITH OIDS;
>>
>> Query:
>> select * from files where nr > 1450
>>
>> (I have total 1500 records in it, every holds picture of 23kB size)
>> Query runs very long:
>> Total query runtime: 23625 ms.
>> Data retrieval runtime: 266 ms.
>> 50 rows retrieved.
>>
>> explain:
>> Index Scan using pk on files  (cost=0.00..3.67 rows=50 width=36)
>> Index Cond: (nr > 1450)
>>
>> Is it possible to do something with it? or it is normal? Our server is
>> fast, and all other tables work fine..
>
> How about some explain analyze output?  Have you done a full vacuum
> lately?
> How about reindexing?
>
> Sean
>
>
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