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Physical separation of tables and indexes - where pg_xlogshould go?

This is a discussion on Physical separation of tables and indexes - where pg_xlogshould go? within the Pgsql Performance forums, part of the PostgreSQL category; --> Hello I am going to separate physical locations of tables and their indexes, by moving indexes to a different ...


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Old 04-19-2008, 10:05 AM
Ireneusz Pluta
 
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Default Physical separation of tables and indexes - where pg_xlogshould go?

Hello

I am going to separate physical locations of tables and their indexes, by moving indexes to a
different volume, through use of tablespaces.

As the data are going to be split, I am considering where pg_xlog should go. It is a general well
known advise to keep pg_xlog on a different physical location than data, so it would be nice to have
a third dedicated place. Unfortunately, this is not an option at the moment.

So here my question comes, what could be better:
1. keeping pg_xlog together with tables, or
2. keeping pg_xlog together with indexes?

My database is mainly readonly, with exceptinos for overnight periods, when bulk data is inserted
and updated.

Thank you

Ireneusz Pluta


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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match

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