RE: [Patch] Optimize dropping of relation buffers using dlist

[tsunakawa.ta...@fujitsu.com]

        From: Jamison, Kirk/ジャミソン カーク <k.jami...@fujitsu.com>
> Is my understanding above correct?

No.  I simply meant DropRelFileNodeBuffers() calls the following function, and 
avoids the optimization if it returns InvalidBlockNumber.


BlockNumber
smgrcachednblocks(SMgrRelation reln, ForkNumber forknum)
{
        return reln->smgr_cached_nblocks[forknum];
}


Regards
Takayuki Tsunakawa