Re: Recovery performance of standby for multiple concurrenttruncates on large tables

Hi,

On 2018-07-30 16:01:53 -0400, Robert Haas wrote:
> (1) Limit the number of deferred drops to a reasonably small number
> (one cache line?  1kB?).

Yea, you'd have to, because we'd frequently need to check it, and it'd
need to be in shared memory. But that'd still leave us to regress to
O(n^2) as soon as a transaction goes over that limit - which I don't
think is that infrequent...

Greetings,

Andres Freund