Thread: archive_timeout - good indication

archive_timeout - good indication

From
Renato Oliveira
Date:

Dear all,

 

What would be a good indication for  ‘archive_timeout’ on a busy server?

 

Thanks

 

Renato

 

 
Renato Oliveira
Systems Administrator
e-mail: renato.oliveira@grant.co.uk
 
Tel: +44 (0)1763 260811
Fax: +44 (0)1763 262410
www.grant.co.uk
 
Grant Instruments (Cambridge) Ltd
 
Company registered in England, registration number 658133
 
Registered office address:
29 Station Road,
Shepreth,
CAMBS SG8 6GB
UK
 
 
 
 

 

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Re: archive_timeout - good indication

From
"Kevin Grittner"
Date:
Renato Oliveira <renato.oliveira@grant.co.uk> wrote:

> What would be a good indication for  'archive_timeout' on a busy
> server?

The maximum amount of time for which you can tolerate lost
transactions in case you need to use the backup for crash recovery.
Note that you need to balance that need against the space
requirements of the WAL files.  You can mitigate the space problem
by using pg_clearxlogtail or pglesslog.

-Kevin

Re: archive_timeout - good indication

From
Renato Oliveira
Date:
Kevin,

Thank you for the reply.
I guess 60Sec is a valid option if this is the 'time period' we can tolerate.

PS pg_clearxlogtail I tried to lookup more info about it but could not find much.
With regards to pglesslog I found the site which hosts the project, seems interesting.

My question is does it copy the logs as well as compresses it, because there is an example: archive_command =
'pg_compresslog"%p" /"%f"' 
Is this instead of using 'cp'?

Thank you very much

Best regards

Renato



Renato Oliveira
Systems Administrator
e-mail: renato.oliveira@grant.co.uk

Tel: +44 (0)1763 260811
Fax: +44 (0)1763 262410
http://www.grant.co.uk/

Grant Instruments (Cambridge) Ltd

Company registered in England, registration number 658133

Registered office address:
29 Station Road,
Shepreth,
CAMBS SG8 6GB
UK

-----Original Message-----


From: Kevin Grittner [mailto:Kevin.Grittner@wicourts.gov]
Sent: 09 April 2010 15:22
To: Renato Oliveira; pgsql-admin
Subject: Re: [ADMIN] archive_timeout - good indication

Renato Oliveira <renato.oliveira@grant.co.uk> wrote:

> What would be a good indication for  'archive_timeout' on a busy
> server?

The maximum amount of time for which you can tolerate lost
transactions in case you need to use the backup for crash recovery.
Note that you need to balance that need against the space
requirements of the WAL files.  You can mitigate the space problem
by using pg_clearxlogtail or pglesslog.

-Kevin



-----Original Message-----


P Please consider the environment before printing this email
CONFIDENTIALITY: The information in this e-mail and any attachments is confidential. It is intended only for the named
recipients(s).If you are not the named recipient please notify the sender immediately and do not disclose the contents
toanother person or take copies. 

VIRUSES: The contents of this e-mail or attachment(s) may contain viruses which could damage your own computer system.
WhilstGrant Instruments (Cambridge) Ltd has taken every reasonable precaution to minimise this risk, we cannot accept
liabilityfor any damage which you sustain as a result of software viruses. You should therefore carry out your own
viruschecks before opening the attachment(s). 

OpenXML: For information about the OpenXML file format in use within Grant Instruments please visit our
http://www.grant.co.uk/Support/openxml.html