Big index sizes - Mailing list pgsql-performance

From Laszlo Nagy
Subject Big index sizes
Date
Msg-id 4959E477.9050700@shopzeus.com
Whole thread Raw
Responses Re: Big index sizes  (Guillaume Lelarge <guillaume@lelarge.info>)
Re: Big index sizes  ("Robert Haas" <robertmhaas@gmail.com>)
List pgsql-performance
We have serveral table where the index size is much bigger than the
table size.

Example:

select count(*) from product_price -- 2234244

Table size: 400 MB
Index size: 600 MB

After executing "reindex table product_price", index size reduced to 269MB.

I believe this affects performance.

Vacuuming a table does not rebuild the indexes, am I right? I'm not sure
if I need to do this manually, or is this the result of another problem?
(For example, too many open transactions, frequent updates?)


Thanks


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