Re: pgstattuple extension for indexes

From: satoshi nagayasu <nagayasus(at)nttdata(dot)co(dot)jp>
To: pgsql-hackers(at)postgresql(dot)org, pgsql-patches(at)postgresql(dot)org
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, ITAGAKI Takahiro <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp>, Bruce Momjian <bruce(at)momjian(dot)us>, ishii(at)sraoss(dot)co(dot)jp
Subject: Re: pgstattuple extension for indexes
Date: 2006-07-28 06:00:18
Message-ID: 44C9A7F2.2010607@nttdata.co.jp
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Hi folks,

As I said on -PATCHES, I've been working on an utility to get
a b-tree index information. I'm happy to introduce
my new functions to you.

pgstattuple module provides a `pgstatindex()`, and other small
functions, which allow you to get b-tree internal information.
I believe this module will be helpful to know b-tree index deeply.

So please try it, send comment to me, and have fun.

Thanks,
--
NAGAYASU Satoshi <nagayasus(at)nttdata(dot)co(dot)jp>

-----------------------------------------------------
pgbench=# \x
Expanded display is on.
pgbench=# SELECT * FROM pgstatindex('accounts_pkey');
-[ RECORD 1 ]------+--------
version | 2
tree_level | 1
index_size | 3588096
root_block_no | 3
internal_pages | 0
leaf_pages | 437
empty_pages | 0
deleted_pages | 0
avg_leaf_density | 59.5
leaf_fragmentation | 49.89
-----------------------------------------------------

Attachment Content-Type Size
pgstatindex.tar.gz application/x-gzip 5.9 KB

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