On Fri, Sep 14, 2012 at 3:44 AM, Maya Opperman <m...@omniaccounts.co.za>wrote:
> > > I'd like both reads and fetches, with statistics > >for a run of the subquery that's fast and one that's slow. Did you mean > >that computing one account balance involved forty-seven thousand indexed > >reads? That's some account! > > Yup. BUT, the weird thing is, it's that SAME account that is sometimes > fast and sometimes slow. It just depends on what other table/account you've > queried beforehand. > Right, but in order to understand why one is fast and one is slow, it would be good to get statistics on a fast run and a slow one, regardless of which account is actually being balanced. > > Max depth in the whole database is 3 ;-) > Good. > > >I'm sure you mentioned it somewhere, but what is the database page size? > > And the cache size? > > Page size 8192 > Page buffers 1000 <<<< was 150, but I tried increasing > to see if it would make a difference - it didn't seem to have any effect > Attributes force write, no reserve > Sweep interval: 200000 > Very odd.. Good luck, Ann [Non-text portions of this message have been removed]
