I ran tests and following are the details: Machine details: Architecture: ppc64le Byte Order: Little Endian 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> 16 32 64 128 size 16MB 18895.63486 28799.48759 37855.39521 27968.88309 32MB 18313.1461 29201.44954 40733.80051 32458.74147 64 MB 18055.73141 30875.28687 42713.54447 38009.60542 128MB 18234.31424 33208.65419 48604.5593 45498.27689 256MB 19524.36498 35740.19032 54686.16898 54060.11168 512MB 20351.90719 37426.72174 55045.60719 56194.99349 1024MB 19667.67062 35696.19194 53666.60373 54353.0614 I did not get any degradation, in fact, higher values showed performance improvement for higher client count. -- Beena Emerson EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company