On Wed, Jan 28, 2015 at 7:46 AM, Robert Haas <robertmh...@gmail.com> wrote: > > > All that aside, I still can't account for the numbers you are seeing. > When I run with your patch and what I think is your test case, I get > different (slower) numbers. And even if we've got 6 drives cranking > along at 400MB/s each, that's still only 2.4 GB/s, not >6 GB/s. So > I'm still perplexed. >
I have tried the tests again and found that I have forgotten to increase max_worker_processes due to which the data is so different. Basically at higher client count it is just scanning lesser number of blocks in fixed chunk approach. So today I again tried with changing max_worker_processes and found that there is not much difference in performance at higher client count. I will take some more data for both block_by_block and fixed_chunk approach and repost the data. With Regards, Amit Kapila. EnterpriseDB: http://www.enterprisedb.com
