Add 'sudo sysctl -w kernel.sem="250 32000 256 256"' for PostgreSQL

toolset/benchmark/benchmarker.py

@@ -381,6 +381,7 @@ class Benchmarker:
       sudo sysctl net.ipv4.tcp_tw_recycle=1
       sudo sysctl -w kernel.shmmax=2147483648
       sudo sysctl -w kernel.shmall=2097152
+      sudo sysctl -w kernel.sem="250 32000 256 256"
     """)
   ############################################################
   # End __setup_database