Re: [HACKERS] some problems with new locking code
От | Bruce Momjian |
---|---|
Тема | Re: [HACKERS] some problems with new locking code |
Дата | |
Msg-id | 199802241956.OAA14773@candle.pha.pa.us обсуждение исходный текст |
Ответ на | some problems with new locking code ("Vadim B. Mikheev" <vadim@sable.krasnoyarsk.su>) |
Список | pgsql-hackers |
> > I created simple table (just single int4 attr) with index on it > and tried to reproduce reported problems with BTP_CHAIN flag > (without success, unfortunately ?) by inserting data by 3-4 psql-s > simultaneously. No problems with 2 clients. But when 3rd psql > starts one of psql-s becomes blocked for long time (a minutes). > After some time blocked process may continue insertion but > another process is sleeping instead of wake-uped proc. The same > with 4 psql-s: one of process is always sleeping! Thanks for finding this, Vadim. I had meant to re-run my locking tests on the new code before the 6.3 final, but had not done it yet. I ran them now, and they didn't work as they should. It is fixed now. The problem was that I was incrementing a counter in a while conditional test, even though I was not executing the loop, and the counter was used in the next loop. -- Bruce Momjian | 830 Blythe Avenue maillist@candle.pha.pa.us | Drexel Hill, Pennsylvania 19026 + If your life is a hard drive, | (610) 353-9879(w) + Christ can be your backup. | (610) 853-3000(h)
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