Via crontab we would DELETE older links in the memory table and then INSERT links from a myisam table.
This process under 4.1.7 is MUCH slower. Specifically the DELETE is taking forever.
We would run:
DELETE FROM FOO_MEMORY WHERE FOO_MEMORY.TIMESTAMP < 1105055409729;
But now this takes forever...
I realize that no index is used on this query but due to the fact that its a memory table it should sitll be FAST as heck.
Hash anything changed with rehashing that could effect the performance here?
I could install a 4.0.18 node to benchmark but this would take a while as they are all upgraded.......
Kevin
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