On Thu, Dec 1, 2016 at 8:10 PM, Jesper Pedersen <jesper.peder...@redhat.com> wrote: >As the concurrent hash index patch was committed in 6d46f4 this patch needs a rebase.
Thanks Jesper, Adding the rebased patch. I have re-run the pgbench readonly tests with below modification. "alter table pgbench_accounts drop constraint pgbench_accounts_pkey" postgres "create index pgbench_accounts_pkey on pgbench_accounts using hash(aid)" postgres *Postgres Server settings:* ./postgres -c shared_buffers=8GB -N 200 -c min_wal_size=15GB -c max_wal_size=20GB -c checkpoint_timeout=900 -c maintenance_work_mem=1GB -c checkpoint_completion_target=0.9 *pgbench settings:* scale_factor = 300 (so database fits in shared_buffer) Mode = -M prepared -S (prepared readonly mode). Machine used: power2 with sufficient ram for above shared_buffer. #############lscpu CPU(s): 192 On-line CPU(s) list: 0-191 Thread(s) per core: 8 Core(s) per socket: 1 Socket(s): 24 NUMA node(s): 4 Model: IBM,8286-42A *Clients * *Cache Meta Page patch * *Base code with amits changes* * %imp* 1 17062.513102 17218.353817 -0.9050848685 8 138525.808342 128149.381759 8.0971335488 16 212278.44762 205870.456661 3.1126326054 32 369453.224112 360423.566937 2.5052904425 *64* *576090.293018* *510665.044842* *12.8117733604* *96* *686813.187117* *504950.885867* *36.0158396272* *104* *688932.67516* *498365.55841* *38.2384202789* *128* *730728.526322* *409011.008553* *78.6574226711* Appears there is a good improvement at higher clients. -- Thanks and Regards Mithun C Y EnterpriseDB: http://www.enterprisedb.com
cache_hash_index_meta_page_06.patch
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