Re: Table partitioning for maximum speed? - Mailing list pgsql-general

From Vivek Khera
Subject Re: Table partitioning for maximum speed?
Date
Msg-id 16263.8737.739152.441756@yertle.int.kciLink.com
Whole thread Raw
In response to Re: Table partitioning for maximum speed?  (Jean-Luc Lachance <jllachan@nsd.ca>)
List pgsql-general
>>>>> "JL" == Jean-Luc Lachance <jllachan@nsd.ca> writes:


JL> BULL.
JL> How many times does PG have to scan the whole table because of MVCC?
JL> At least with partitioning there is a fighting chance that that won't be
JL> necessary.

Huh?  His specific query was "WHERE md5 = '....'".  Why on earth would
that force a sequence scan if it were an indexed column?  Heck, the
btree index should rule out 15/16ths of the rows after the first
character comparison.


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