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Re: Estimating WAL usage during pg_basebackup - Mailing list pgsql-general

From Soni M
Subject Re: Estimating WAL usage during pg_basebackup
Date
Msg-id CAAMgDXk_DuHx4QgRnWni-Ys28bCA+U5bo529FJQjVqMU2ndjbg@mail.gmail.com
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In response to Estimating WAL usage during pg_basebackup  (Mike Blackwell <mike.blackwell@rrd.com>)
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This is hard to tell, but You can get some estimation.
1. You can have WAL rate estimation from pg_xlog/ dir, i.e. How many WAL generated per minutes
2. How long this pg_basebackup will last. Lets say for 3 hours.
Then You can multiple values in #1 and #2 to get rough estimation.

Hope this would help.

On Fri, Oct 31, 2014 at 1:52 AM, Mike Blackwell <mike.blackwell@rrd.com> wrote:
I need to get an idea of how much WAL space will be required during a long (many hours) pg_basebackup over a relatively slow network connection.  This is for a server that's not yet running PITR / streaming.

Any thoughts?



--
Regards,

Soni Maula Harriz

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