archive_timeout - good indication

archive_timeout - good indication

am 09.04.2010 10:00:52 von Renato Oliveira

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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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Tel: +=
44 (0)1763 260811
Fax: +44 (0)1763 262410
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Grant =
Instruments (Cambridge) Ltd
 
Company registered in England, re=
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ment before printing this email


CONFIDENTIALITY: The =
information in this e-mail and any attachments is confidential. It is inten=
ded only for the named recipients(s). If you are not the named recipient pl=
ease notify the sender immediately and do not disclose the contents to anot=
her person or take copies.

 


VIRUSES: The contents=
of this e-mail or attachment(s) may contain viruses which could damage you=
r own computer system. Whilst Grant Instruments (Cambridge) Ltd has taken e=
very reasonable precaution to minimise this risk, we cannot accept liabilit=
y for any damage which you sustain as a result of software viruses. You sho=
uld therefore carry out your own virus checks before opening the attachment=
(s).

 


OpenXML: For informat=
ion about the OpenXML file format in use within Grant Instruments please vi=
sit our =


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Re: archive_timeout - good indication

am 09.04.2010 16:22:26 von Kevin Grittner

Renato Oliveira 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

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Re: archive_timeout - good indication

am 12.04.2010 13:04:38 von Renato Oliveira

Kevin,

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

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 i=
nteresting.

My question is does it copy the logs as well as compresses it, because ther=
e is an example: archive_command =3D '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 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 conf=
idential. It is intended only for the named recipients(s). If you are not t=
he named recipient please notify the sender immediately and do not disclose=
the contents to another person or take copies.

VIRUSES: The contents of this e-mail or attachment(s) may contain viruses w=
hich could damage your own computer system. Whilst Grant Instruments (Cambr=
idge) Ltd has taken every reasonable precaution to minimise this risk, we c=
annot accept liability for any damage which you sustain as a result of soft=
ware viruses. You should therefore carry out your own virus checks before o=
pening 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


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