Testing Replication

Let's test the replication functionality using a benchmark tool pgbench , which comes with the standard PostgreSQL installation. Type following to create the benchmark tables.

$ pgbench -i -p 11000 test
      

To see if the replication works correctly, directly connect to the primary and the standby server to see if they return identical results.

$ psql -p 11002 test
\dt
              List of relations
 Schema |       Name       | Type  |  Owner  
--------+------------------+-------+---------
 public | pgbench_accounts | table | t-ishii
 public | pgbench_branches | table | t-ishii
 public | pgbench_history  | table | t-ishii
 public | pgbench_tellers  | table | t-ishii
(4 rows)
\q
$ psql -p 11003 test
\dt
              List of relations
 Schema |       Name       | Type  |  Owner  
--------+------------------+-------+---------
 public | pgbench_accounts | table | t-ishii
 public | pgbench_branches | table | t-ishii
 public | pgbench_history  | table | t-ishii
 public | pgbench_tellers  | table | t-ishii
(4 rows)
      

The primary server (port 11002) and the standby server (port 11003) return identical results. Next, let's run pgbench for a while and check to results.

$ pgbench -p 11000 -T 10 test
starting vacuum...end.
transaction type: <builtin: TPC-B (sort of)>
scaling factor: 1
query mode: simple
number of clients: 1
number of threads: 1
duration: 10 s
number of transactions actually processed: 2171
latency average = 4.692 ms
tps = 213.147520 (including connections establishing)
tps = 213.258008 (excluding connections establishing)

$ psql -p 11002 -c "SELECT sum(abalance) FROM pgbench_accounts" test
  sum   
--------
 192112
(1 row)

$ psql -p 11003 -c "SELECT sum(abalance) FROM pgbench_accounts" test
  sum   
--------
 192112
(1 row)
      

Again, the results are identical.