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Memory usage very high
Posted by: Glenn Reed
Date: January 26, 2009 10:03PM

Running an aggregrate query to populate a summary (counter) table takes several minutes to complete and uses a great deal of memory. All of 1.5 GB on my development machine.

I am summarizing a table with 12,000,000 rows into a in-memory table. The number of rows returned though should be small, about 5000 rows or such.

However when running the query it uses up all available memory on computer. Doesn't appear to crash but the memory is not reclaimed when the query finishes.

Is there a way to limit the amount of physical memory that mysqld allocates?

Regards
Glenn.

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