Additional stats for Relations
От | NikhilS |
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Тема | Additional stats for Relations |
Дата | |
Msg-id | d3c4af540610130547l69333c32o48301812bc4b1d76@mail.gmail.com обсуждение исходный текст |
Ответы |
Re: Additional stats for Relations
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Список | pgsql-hackers |
Hi, <br /><br /> Currently a "select * from pg_statio_user_tables;" displays only heap_blks_read, heap_blks_hit stats amongstothers for the main relation. It would be good to have the following stats collected too. I think these stats canbe used to better statistically analyze/understand the block I/O activity on the relation:<br /><br /> heap_blks_reused:The number of buffers returned by the FSM for use to store a new tuple in<br /><br /> heap_blks_extend:The number of times file extend was invoked on the relation<br /><br /> heap_blks_truncate: The total numberof blocks that have been truncated due to vacuum activity e.g.<br /><br /> As an addendum to the truncate stats above,we can also have the additional following stats:<br /><br /> heap_blks_maxtruncate: The max block of buffers truncatedin one go<br /><br /> heap_blks_ntruncate: The number of times truncate was called on this relation<br clear="all"/><br /> I can come up with a patch (already have one) for the above. Any thought/comments?<br /><br /> Regards,<br/> Nikhils <br /> (<a href="http://www.enterprisedb.com">www.enterprisedb.com</a>)<br />-- <br />All the world'sa stage, and most of us are desperately unrehearsed.<br />
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