On Sun, Feb 13, 2022 at 1:34 AM Dilip Kumar <dilipbal...@gmail.com> wrot> > test4: > 32 GB shared buffers, template DB size = 10GB, dirty shared buffer=70% > Head: 47656 ms > Patch: 79767 ms
This seems like the most surprising result of the bunch. Here, the template DB is both small enough to fit in shared_buffers and small enough not to trigger a checkpoint all by itself, and yet the patch loses. Did you checkpoint between one test and the next, or might this test have been done after a bunch of WAL had already been written since the last checkpoint so that the 10GB pushed it over the edge? BTW, you have test4 twice in your list of results. -- Robert Haas EDB: http://www.enterprisedb.com
