From: Robert Haas [mailto:robertmhaas@gmail.com]
> That's not my experience. I agree that plan caching isn't important
> for long-running queries, but I think it *is* potentially important
> for fast queries with fast planning time. Even when the planning time
> is fast, it can be a significant percentage of the execution time.
> Not long ago, we had a case at EDB where a customer was getting custom
> plans instead of generic plans and that resulted in a significant
> reduction in TPS.
I have the same experience with our customers. Their batch applications suffered from performance compared to Oracle
andSQL Server. Those apps repeatedly issued simple SELECT statements that retrieve a single row.
Regards
Takayuki Tsunakawa
