On Tue, 21 Apr 2020 at 2:36 PM, Jeevan Ladhe <jeevan.la...@enterprisedb.com> wrote:
> Hi Asif, > > On Tue, Apr 21, 2020 at 1:00 PM Asif Rehman <asifr.reh...@gmail.com> > wrote: > >> Hi, >> >> I did some tests a while back, and here are the results. The tests were >> done to simulate >> a live database environment using pgbench. >> >> machine configuration used for this test: >> Instance Type: t2.xlarge >> Volume Type : io1 >> Memory (MiB) : 16384 >> vCPU # : 4 >> Architecture : X86_64 >> IOP : 16000 >> Database Size (GB) : 102 >> >> The setup consist of 3 machines. >> - one for database instances >> - one for pg_basebackup client and >> - one for pgbench with some parallel workers, simulating SELECT loads. >> >> basebackup | 4 workers | 8 Workers | >> 16 workers >> Backup Duration(Min): 69.25 | 20.44 | 19.86 | >> 20.15 >> (pgbench running with 50 parallel client simulating SELECT load) >> > > > Well that looks a bit strange. All 4, 8 and 16 workers backup > configurations > seem to have taken the same time. Is it because the machine CPUs are > only 4? In that case did you try to run with 2-workers and compare that > with 4-workers time? > > Also, just to clarify and be sure - was there anything else running on any > of > these 3 machines while the backup was in progress. > The tests were performed only for 4, 8 and 16 at the time and there was nothing else running on any of the machines. > Regards, > Jeevan Ladhe > > >> Backup Duration(Min): 154.75 | 49.28 | 45.27 | 20.35 >> (pgbench running with 100 parallel client simulating SELECT load) >> >> >> >> On Tue, Apr 21, 2020 at 9:27 AM Amit Kapila <amit.kapil...@gmail.com> >> wrote: >> >>> On Tue, Apr 14, 2020 at 8:07 PM Asif Rehman <asifr.reh...@gmail.com> >>> wrote: >>> >>>> >>>> I forgot to make a check for no-manifest. Fixed. Attached is the >>>> updated patch. >>>> >>>> >>> Have we done any performance testing with this patch to see the >>> benefits? If so, can you point me to the results? If not, then can we >>> perform some tests on large backups to see the benefits of this patch/idea? >>> >>> -- >>> With Regards, >>> Amit Kapila. >>> EnterpriseDB: http://www.enterprisedb.com >>> >> >> >> -- >> -- >> Asif Rehman >> Highgo Software (Canada/China/Pakistan) >> URL : www.highgo.ca >> >> -- -- Asif Rehman Highgo Software (Canada/China/Pakistan) URL : www.highgo.ca
