Re: scan_recycle_buffers

Simon Riggs wrote:
> Patch to implement buffer cache recycling for scans, as being discussed
> on pgsql-hackers.

A few questions come to mind:

How does it behave with Jeff's synchronized seq scans patch?

I wonder if calling RelationGetNumberOfBlocks on every seq scan becomes
a performance issue for tiny tables with for example just 1 page. It
performs an lseek, which isn't free.

What happens if multiple backends choose overlapping sets of buffers to
recycle?

--
   Heikki Linnakangas
   EnterpriseDB   http://www.enterprisedb.com