Re: When partition a table
Posted by:
Rick James
Date: March 31, 2012 06:53AM
* Don't bother PARTITIONing unless you expect least a million rows. You are unlikely to get any performance improvements for smaller tables.
* One of 3 use cases. All of these use "PARTITION BY RANGE".
** "Rolling data" -- Example: You have info you want to purge after 90 days. Create 90 partitions (plus a couple), and have a daily script to add a new partition (REORGANIZE PARTITION) and drop old data (DROP PARTITION).
** You need two "clustered" indexes. PARTITION does not really give you that, but it can help enough to make it win.
** You have (1) most activity in the 'latest' partition, and (2) you have secondary indexes that are very random (GUID, MD5, etc).
I have not found use cases for
* non-"RANGE" partitioning
* SUBPARTITIONing
* non-performance reasons.
Does anyone else have some use cases?
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Re: When partition a table
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