Postgres-XC tutorial PDF - PGCon
Postgres-XC tutorial PDF - PGCon
Postgres-XC tutorial PDF - PGCon
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Performing JOINs on datanodes<br />
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Indexes can help to perform JOIN faster<br />
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Indexes available only on datanode<br />
Aggregates, grouping, sorting can as well be performed<br />
on datanode<br />
Always perform JOINs on the datanode<br />
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In <strong>XC</strong>, coordinators do not have correct statistics, so can't<br />
predict the selectivity<br />
Proper costing model is yet to be implemented<br />
May 16th, 2012 <strong>Postgres</strong><strong>XC</strong> 58