Re: RC2 and open issues
От | Bruce Momjian |
---|---|
Тема | Re: RC2 and open issues |
Дата | |
Msg-id | 200412210525.iBL5PnC11912@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: RC2 and open issues (Gavin Sherry <swm@linuxworld.com.au>) |
Список | pgsql-hackers |
Gavin Sherry wrote: > Neil and I spoke with Jan briefly last week and he mentioned a few > different approaches he'd been tossing over. Firstly, for alternative > runs, start X% on from the LRU, so that we aren't scanning clean buffers > all the time. Secondly, follow something like the approach you've > mentioned above but remember the offset. So, if we're scanning 10%, after > 10 runs we will have written out all buffers. > > I was also thinking of benchmarking the effect of changing the algorithm > in StrategyDirtyBufferList(): currently, for each iteration of the loop we > read a buffer from each of T1 and T2. I was wondering what effect reading > T1 first then T2 and vice versa would have on performance. I haven't > thought about this too hard, though, so it might be wrong headed. So we are all thinking in the same direction. We might have only a few days to finalize this before final release. -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 359-1001+ If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania19073
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