Fwd: [HACKERS] Avoid endless futile table locks in vacuuming.

Forgetting to CC the list is starting to become a bad habit, sorry. forwarding to list: -- Forwarded message -- From: Jeff Janes Date: Wed, Dec 30, 2015 at 10:03 AM Subject: Re: [HACKERS] Avoid endless futile table locks in vacuuming. To: Tom Lane

Re: Fwd: [HACKERS] Avoid endless futile table locks in vacuuming.

Jeff Janes writes: > On Dec 29, 2015 4:47 PM, "Tom Lane" wrote: >> Uh, isn't that what my patch is doing? > My reading was it does that only if there are no tuples that could be > frozen. If there are tuples that could be frozen, it actually does > the

Re: Fwd: [HACKERS] Avoid endless futile table locks in vacuuming.

Jeff Janes writes: > So like the attached, although it is a bit weird to call > lazy_check_needs_freeze if , under !scan_all, we don't actually care > about whether it needs freezing but only the hastup. I think this misses unpinning the buffer in the added code path. I