postgresql 自带性能测试工具 pgbench
pgbench 是 postgresql 自带的交互性能测试工具。用于测试postgresql数据库性能。
为了测试postgresql数据库性能，简单测试如下

bash-4.2$ pgbench --help
pgbench is a benchmarking tool for Postgresql.

Usage:
  pgbench [OPTION]... [DBNAME]

Initialization options:
  -i invokes initialization mode   -F NUM fill factor   -s NUM scaling factor   --index-tablespace=TABLESPACE                create indexes in the specified tablespace
  --tablespace=TABLESPACE                create tables in the specified tablespace
  --unlogged-tables                create tables as unlogged tables

Benchmarking options:
  -c NUM number of concurrent database clients (default: 1)   -C establish new connection for each transaction   -D VARNAME=VALUE                define variable for use by custom script
  -f FILENAME read transaction script from FILENAME   -j NUM number of threads (default: 1)   -l write transaction times to log file   -M simple|extended|prepared                protocol for submitting queries to server (default: simple)
  -n do not run VACUUM before tests   -N do not update tables "pgbench_tellers" and "pgbench_branches"   -r report average latency per command   -s NUM report this scale factor in output   -S perform SELECT-only transactions   -t NUM number of transactions each client runs (default: 10)   -T NUM duration of benchmark test in seconds   -v vacuum all four standard tables before tests 
Common options:
  -d print debugging output   -h HOSTNAME database server host or socket directory   -p PORT database server port number   -U USERNAME connect as specified database user   -V,--version output version information,then exit   -?,--help show this help,then exit 
Report bugs to <pgsql-bugs@postgresql.org>.

• 测试数据库初始化

pgbench -i pgbench

生成8千万数据的测试库

pgbench -i  -s 800 pgbench

生成20亿测试数据(海量数据生成，生成速度看机器配置)

pgbench -i-s 20000 pgbench

单独安装，postgresql94-contrib

yum install http://yum.postgresql.org/9.4/redhat/rhel-6-x86_64/pgdg-redhat94-9.4-1.noarch.rpm

yum install  postgresql94-contrib