Re: [GENERAL] Sorting performance vs. MySQL

[Frank Heikens]

Op 22 feb 2010, om 20:28 heeft Yang Zhang het volgende geschreven:

If your work-mem is too low there's a good chance that Postgres has to

use your disks for sorting, which will obviously be quite slow.

Relative to the non-terminating 80-minute-so-far sort, Unix sort runs

much faster (on the order of several minutes).

Make sure your index does fit into memory, what's the size of the index?

How might I find out the size and whether it's being fit in memory?

SELECT pg_size_pretty(pg_relation_size('i_transactionid'));

--
Yang Zhang
http://www.mit.edu/~y_z/

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Frank Heikens




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