• gpcheckperf : It helps identify hardware issues. This must have a trusted
host setup between the hosts involved in the performance test. It calls to
gpssh and gpscp , so these utilities must also be in our $PATH.
• gpcheckperf : It performs the following:
• Disk I/O test
• Memory bandwidth test (This utility uses the STREAM benchmark pro-
gram to measure sustainable memory bandwidth (in MB/s) and net-
work performance test ( gpnetbench ). This test is best used to val-
idate if the switch fabric can tolerate a full-matrix workload. For addi-
tionalinformationon gpstate and gpcheckperf refertotheGreen-
plum Database Utility guide.)
gpcheckperf puts considerable strain on a system and should not be
used on an active, production system.