Обсуждение: Template0 age is increasing speedily.
Hi!..
I noticed that the age of template0 is increasing very rapidly..Can you please let me know how we can control this ....and what causes such problems.
We also noticed that the database slow downs heavily at a particular time..Can you suggest any tools which will help in diagnosing the root cause behiond the data load.
Regards,
Nimesh.
On Thu, 2006-09-07 at 16:01 +0530, Nimesh Satam wrote: > I noticed that the age of template0 is increasing very rapidly..Can > you please let me know how we can control this ....and what causes > such problems. > > We also noticed that the database slow downs heavily at a particular > time..Can you suggest any tools which will help in diagnosing the root > cause behiond the data load. Hi, first of all: there is no need to cross post on 4 lists. If you have a performance problem, post on pgsql-performance. Second, please tell us which version of PostgreSQL on which operating system you're using. Diagnosing your problem might depend on which OS you use... Finally, explain what you mean by "the age of template0 is increasing very rapidly", you mean "the size is increasing"? Bye, Chris. -- Chris Mair http://www.1006.org
Hi,
Postgres Version used is 8.1.3
OS: Linux
'SELECT datname, age(datfrozenxid) FROM pg_database'
postgres | 1575
xyz | 1073743934
template1 | 1632
template0 | 61540256
xyz | 1073743934
template1 | 1632
template0 | 61540256
This is the command which I tried and got the above output, and the number is increasing pretty fast for template0.
Please let me know if this a problem.
Regards,
Nimesh.
On 9/7/06, Chris Mair <chrisnospam@1006.org> wrote:
On Thu, 2006-09-07 at 16:01 +0530, Nimesh Satam wrote:
> I noticed that the age of template0 is increasing very rapidly..Can
> you please let me know how we can control this ....and what causes
> such problems.
>
> We also noticed that the database slow downs heavily at a particular
> time..Can you suggest any tools which will help in diagnosing the root
> cause behiond the data load.
Hi,
first of all: there is no need to cross post on 4 lists.
If you have a performance problem, post on pgsql-performance.
Second, please tell us which version of PostgreSQL on
which operating system you're using. Diagnosing your
problem might depend on which OS you use...
Finally, explain what you mean by "the age of template0 is
increasing very rapidly", you mean "the size is increasing"?
Bye,
Chris.
--
Chris Mair
http://www.1006.org
In response to "Nimesh Satam" <nimesh.zedo@gmail.com>: > Hi, > > Postgres Version used is 8.1.3 > OS: Linux > > > 'SELECT datname, age(datfrozenxid) FROM pg_database' > > postgres | 1575 > xyz | 1073743934 > template1 | 1632 > template0 | 61540256 > > This is the command which I tried and got the above output, and the number > is increasing pretty fast for template0. > > Please let me know if this a problem. Short answer: no, this is not a problem. Long answer: http://www.postgresql.org/docs/8.1/interactive/manage-ag-templatedbs.html -- Bill Moran Collaborative Fusion Inc. **************************************************************** IMPORTANT: This message contains confidential information and is intended only for the individual named. If the reader of this message is not an intended recipient (or the individual responsible for the delivery of this message to an intended recipient), please be advised that any re-use, dissemination, distribution or copying of this message is prohibited. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept liability for any errors or omissions in the contents of this message, which arise as a result of e-mail transmission. ****************************************************************
I would expect that the age of Template0 is increasing at the same rate as every other database in your cluster. Transaction IDs are global across all databases in the cluster, so as I understand it, executing a transaction in any database will increase the age of all databases by 1.
-----Original Message-----
From: pgsql-performance-owner@postgresql.org [mailto:pgsql-performance-owner@postgresql.org] On Behalf Of Nimesh Satam
Sent: Thursday, September 07, 2006 5:49 AM
To: Chris Mair
Cc: pgsql-performance@postgresql.org
Subject: Re: [PERFORM] [PATCHES] Template0 age is increasing speedily.
Hi,Postgres Version used is 8.1.3OS: Linux'SELECT datname, age(datfrozenxid) FROM pg_database'postgres | 1575
xyz | 1073743934
template1 | 1632
template0 | 61540256
This is the command which I tried and got the above output, and the number is increasing pretty fast for template0.Please let me know if this a problem.Regards,Nimesh.
On 9/7/06, Chris Mair <chrisnospam@1006.org> wrote:On Thu, 2006-09-07 at 16:01 +0530, Nimesh Satam wrote:
> I noticed that the age of template0 is increasing very rapidly..Can
> you please let me know how we can control this ....and what causes
> such problems.
>
> We also noticed that the database slow downs heavily at a particular
> time..Can you suggest any tools which will help in diagnosing the root
> cause behiond the data load.
Hi,
first of all: there is no need to cross post on 4 lists.
If you have a performance problem, post on pgsql-performance.
Second, please tell us which version of PostgreSQL on
which operating system you're using. Diagnosing your
problem might depend on which OS you use...
Finally, explain what you mean by "the age of template0 is
increasing very rapidly", you mean "the size is increasing"?
Bye,
Chris.
--
Chris Mair
http://www.1006.org
On 9/7/06, Nimesh Satam <nimesh.zedo@gmail.com> wrote: > We also noticed that the database slow downs heavily at a particular > time..Can you suggest any tools which will help in diagnosing the root cause > behiond the data load. possible checkpoint? poorly formulated query? it could be any number of things. use standard tools to diagnose the problem, including: unix tools: top, vmstat, etc postgresql query logging, including min_statement_duration explain analyze