Thread: Selection of index for CLUSTER

Selection of index for CLUSTER

From
Marcin Krol
Date:
Hello everyone,

Is there some guideline for selection of index to use for CLUSTER? This
is rather important as physical table is reorganized according to that
index I gather? The docs are mute on this.

The docs recommend running ANALYZE on the table.

hrs=# ANALYZE VERBOSE hosts;
INFO:  analyzing "public.hosts"
INFO:  "hosts": scanned 47 of 47 pages, containing 765 live rows and 13
dead rows; 765 rows in sample, 765 estimated total rows
ANALYZE

Doh. Not much help here.

Regards,
mk

Re: Selection of index for CLUSTER

From
Leonardo F
Date:
> The docs are mute on this.


Not true. Read the NOTES section of

http://www.postgresql.org/docs/8.4/static/sql-cluster.html :