Re: [HACKERS] Problem with complex query
Bruce Momjian <maillist@candle.pha.pa.us>
From: Bruce Momjian <maillist@candle.pha.pa.us>
To: phd2@earthling.net
Cc: PostgreSQL-development <pgsql-hackers@postgreSQL.org>
Date: 1999-05-09T14:57:16Z
Lists: pgsql-hackers
> Hello! > > Query: > > SELECT DISTINCT p.subsec_id > FROM central cn, shops sh, districts d, positions p > WHERE cn.shop_id = sh.shop_id AND sh.distr_id = d.distr_id > AND d.city_id = %d AND cn.pos_id = p.pos_id > AND cn.date_i >= current_date - '7 days'::timespan > > While running postgres slowly eats all swap space (30 Meg) and aborts: > > pqReadData() -- backend closed the channel unexpectedly. > This probably means the backend terminated abnormally before or > while processing the request. > > Is it I just have not enough memory or bug? Not sure how to comment on this. Is 6.5beta any better? -- Bruce Momjian | http://www.op.net/~candle maillist@candle.pha.pa.us | (610) 853-3000 + If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania 19026