Обсуждение: Lost statistics after restore database

Hi,

I have weird problem with database postgresql 9.3.5. I tried to use
pg_upgrade to migrate dabase from postgresql 9.2 to 9.3 it ended in 2
minutes - orginal database has 45GB and after pg_upgrade has 200MB.
So I used pg_dump (9.3.5) with binary format (Fc) and then restore with
pg_restore 9.3.5. Database did restore but thereis problem with
statistics. I have the same database on the other server and when I look
for statistics I have 75 rows and on my broken db I should have the
same, but I have only 20 rows and there are queries that lasts and lasts.
If I give explain analyze for them it last for 45 minutes and more...

On Wed, Feb  4, 2015 at 08:01:15AM +0100, For@ll wrote:
> Hi,
>
> I have weird problem with database postgresql 9.3.5. I tried to use
> pg_upgrade to migrate dabase from postgresql 9.2 to 9.3 it ended in
> 2 minutes - orginal database has 45GB and after pg_upgrade has
> 200MB.
> So I used pg_dump (9.3.5) with binary format (Fc) and then restore
> with pg_restore 9.3.5. Database did restore but thereis problem with
> statistics. I have the same database on the other server and when I
> look for statistics I have 75 rows and on my broken db I should have
> the same, but I have only 20 rows and there are queries that lasts
> and lasts.
> If I give explain analyze for them it last for 45 minutes and more...

Neither upgrade method preserves optimizer statistics, try ANALYZE.

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  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
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