Re: Need some info on Postgresql - Mailing list pgsql-admin

Hi Scott,

Thanks for your reply and pls see my inline comments in red color.

Regards,

G. V. Suresh Gupta

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-----Original Message-----
From: Scott Marlowe [mailto:scott.marlowe@gmail.com]
Sent: Friday, January 04, 2008 7:53 AM
To: Suresh Gupta VG
Cc: Peter Koczan; pgsql-admin@postgresql.org
Subject: Re: [ADMIN] Need some info on Postgresql

On Jan 3, 2008 5:33 AM, Suresh Gupta VG <suresh.g@zensar.com> wrote:

> 

> Hi Team,

> 

> I am using Postgresql 7.4.2 version on Solaris.

You need to update to 7.4.18 or whatever the last version was.  7.4.2

has known data eating bugs, and if you value your data even a little,

you should update.  this is a relatively painless update not requiring

a dump / restore.

Suresh : Can you pls tell is 7.4.2 is latest or 7.4.18 is latest? We will plan to upgrade to 8.2.5.

> There are number of tables

> say about 30+ tables in our database. I started to "reindex" the tables

> individually. "reindex table <<table name>>". All the queries executed

> normally with less than 1 minute of duration. But one table is not

> responding any thing even after 10 minutes. The details of the table are …

I've had large tables take well over 10 minutes on 7.4 to reindex.

That's not necessarily a sign of a problem.  How many rows does this

table have? Do you get any kind of error message or the database just

never returns.  Have you tried vacuum full on this table instead?  Do

the logs say anything about the reindex operation getting an error

etc???

commercelink=# vacuum verbose analyze currency;

INFO:  vacuuming "public.currency"

INFO:  index "currency_pkey" now contains 5 row versions in 2 pages

DETAIL:  0 index pages have been deleted, 0 are currently reusable.

CPU 0.00s/0.00u sec elapsed 0.00 sec.

INFO:  "currency": found 0 removable, 5 nonremovable row versions in 1 pages

DETAIL:  0 dead row versions cannot be removed yet.

There were 3 unused item pointers.

0 pages are entirely empty.

CPU 0.00s/0.00u sec elapsed 0.00 sec.

INFO:  analyzing "public.currency"

INFO:  "currency": 1 pages, 5 rows sampled, 5 estimated total rows

VACUUM

commercelink=# reindex table currency;

^CCancel request sent

ERROR:  canceling query due to user request

> Can you please tell me why it not executing this command on the particular

> table and I am the owner of the DB? Can you please suggest some thing.

Is it really not executing?  Is it simply returning without a notice,

or hanging?

Suresh : It is not executing at all. It is not hanging, I am canceling the query by giving “ctrl c”. Then it is giving me the database prompt as usual.

> We

> found these days, the database is taking more time to execute any query. We

> are doing "vacuum Verbose analyze" regularly at low traffic time.

You would do well to consider a migration to 8.2.5 or 8.3 when it

comes out of beta / RC status.  7.4.x is getting rather old, and the

8.x series (8.0, 8.1, 8.2, and now 8.3) have each had major

improvements in speed.

Suresh : We will plan to upgrade to 8.X. What is this beta / RC status, can you brief me pls?