On Friday 01 June 2007 3:09 pm, George Pavlov wrote:
> On 5/29/2007 10:19 AM, Ed L. wrote:
> > On Wednesday 23 May 2007 1:04 pm, George Pavlov wrote:
> > FWIW, I've also been seeing this sort of query log
> > corruption for as long as I can remember, 7.1 through 8.2,
> > HPUX (parisc, ia64), Linux on intel, amd...
>
> Do you have any tricks for dealing with the problem from a
> query analyzer perspective? That is, if you use something like
> pgfouine do you have any quick and easy way to remove those
> lines (and the affected lines around them)? Or someway to
> "fix" the corrupted lines? I'd say that lately ~40% of my
> daily query logs are suffering from this problem making query
> analysis very hard.
Not really. I filter by perl regular expressions, but I wouldn't
say that is reliable. However, our query volumes are high
enough that losing a few here and there is no big deal in
analysis. I long ago realized that reliably replaying query
logs was infeasible due in part to this issue. Regex filtering
is problematic and error-prone (for example, how do you reliably
tell the difference between log timestamp and DB data?).
Perhaps others have better answers.
Ed
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
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