On 06/12/2015 01:37 PM, Michael Nolan wrote:
> Last night I was doing some tuning on a database The longest query I
> was running was taking around 160 seconds. I didn't see much change in
> the running time for that query, even after restarting PG.
>
> Today, with roughly the same system load (possibly even a bit heavier
> load), that query is running about 40 seconds.
Sounds like some of the relations are cached versus not.
JD
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