On Sun, Apr 3, 2016 at 2:28 PM, Amit Kapila <amit.kapil...@gmail.com> wrote:
> > What is the conclusion of this test? As far as I see, with the patch > (0001-WIP-Avoid-the-use-of-a-separate-spinlock-to-protect), the performance > degradation is not fixed, but with pin-unpin patch, the performance seems > to be better in most of the runs, however still you see less performance in > some of the runs. Is that right? > Summary Of the Run: ----------------------------- 1. Throughout one run if we observe TPS every 30 seconds its stable in one run. 2. With Head 64 client run vary between ~250,000 to ~450000. you can see below results. run1: 434860 (5min) run2: 275815 (5min) run3: 437872 (5min) run4: 237033 (5min) run5: 347611 (10min) run6: 435933 (20min) 3. With Head + 0001-WIP-Avoid-the-use-of-a-separate-spinlock-to-protect with 64 client I always saw ~450,000 TPS run1: 429520 (5min) run2: 446249 (5min) run3: 431066 (5min) run4: 441280 (10min) run5: 429844 (20 mins) 4. With Head+ 0001-WIP-Avoid-the-use-of-a-separate-spinlock-to-protect with 128 Client something performance is as low as ~150,000 which is never observed with Head (with head it is constantly ~ 350,000 TPS). run1: 372958 (5min) run2: 167189 (5min) run3: 381592 (5min) run4: 441280 (10min) run5: 362742 (20 min) 5. With Head+pinunpin-cas-8, with 64 client its ~ 550,000 TPS and with 128 client ~650,000 TPS. 6. With Head+ pinunpin-cas-8 + 0001-WIP-Avoid-the-use-of-a-separate-spinlock-to-protect performance is almost same as with Head+pinunpin-cas-8, only sometime performance at 128 client is low (~250,000 instead of 650,000) Seems like Head+ pinunpin-cas-8 is giving best performance and without much fluctuation. > Can you answer some of the questions asked by Andres upthread[1]? > > > [1] - > http://www.postgresql.org/message-id/20160401083518.ge9...@awork2.anarazel.de > Non Default Parameter: -------------------------------- shared_buffer 8GB Max Connections 150 ./pgbench -c $threads -j $threads -T 1200 -M prepared -S -P 30 postgres *BufferDesc Size:* *------------------------* Head: 80 Bytes Head+0001-WIP-Avoid-the-use-of-a-separate-spinlock-to-protect : 72Bytes Head+0001-WIP-Avoid-the-use-of-a-separate-spinlock-to-protect+ Pinunpin-cas-8 : 64 Bytes -- Regards, Dilip Kumar EnterpriseDB: http://www.enterprisedb.com
