Re: Simple DELETE on modest-size table runs 100% CPU forever

2019-11-15 Thread Craig James
On Fri, Nov 15, 2019 at 2:45 PM Jeff Janes wrote: > On Thu, Nov 14, 2019 at 5:20 PM Craig James wrote: > >> I'm completely baffled by this problem: I'm doing a delete that joins >> three modest-sized tables, and it gets completely stuck: 100% CPU use >> forever. Here's the query: >> >> >> Aggre

Re: Simple DELETE on modest-size table runs 100% CPU forever

2019-11-15 Thread Jeff Janes
On Thu, Nov 14, 2019 at 5:20 PM Craig James wrote: > I'm completely baffled by this problem: I'm doing a delete that joins > three modest-sized tables, and it gets completely stuck: 100% CPU use > forever. Here's the query: > > > Aggregate (cost=193.54..193.55 rows=1 width=8) > -> Nested Loo

RE: Simple DELETE on modest-size table runs 100% CPU forever

2019-11-15 Thread Ravi Rai
Hey James, Looking at your select query, if that’s taking forever STILL. Could it be because of the IN clause? If so, try using EXISTS instead of IN.. should give much better results. From: Craig James Sent: Friday, November 15, 2019 1:07 PM To: Andres Freund Cc: pgsql-performance@lists.postg

Re: Simple DELETE on modest-size table runs 100% CPU forever

2019-11-15 Thread Craig James
On Thu, Nov 14, 2019 at 2:29 PM Andres Freund wrote: > Hi, > > On 2019-11-14 14:19:51 -0800, Craig James wrote: > > I'm completely baffled by this problem: I'm doing a delete that joins > three > > modest-sized tables, and it gets completely stuck: 100% CPU use forever. > > Here's the query: > >