Pgbench benchmark PostgreSQL

pgbench It's a kind of PostgreSQL A simple program to run benchmarks on . It may run the same sequence of... Over and over again in a concurrent database session SQL command , And calculate the average transaction rate （ Transactions per second ）. By default ,pgbench Will test a method based on TPC-B But a more relaxed scenario , There are five... Involved in each transaction SELECT、UPDATE as well as INSERT command . however , By writing your own transaction script file, it's easy to test other situations .

1. modify pg_hba.conf

host  all    all    10.6.8.0/24    trust

systemctl status postgresql-13

2. test

2.1 initialization

[[email protected] data]# /usr/pgsql-13/bin/pgbench  -i --unlogged-tables -s 2 -U user001 -p 5432 -d db001 -h 10.6.8.238
dropping old tables...
creating tables...
generating data (client-side)...
200000 of 200000 tuples (100%) done (elapsed 0.07 s, remaining 0.00 s)
vacuuming...
creating primary keys...
done in 0.57 s (drop tables 0.03 s, create tables 0.03 s, client-side generate 0.24 s, vacuum 0.14 s, primary keys 0.12 s).

2.2 Perform a stress test

-M prepared Represents a call in the form of a bound variable SQL,-r Represents each... In the report test file SQL Average execution delay of ,
-c 8 Indicates simulation 8 A client ,-j 2 Express pgbench The working thread is 2 individual ,
-T 10 Indicates that the time of stress test is 10 second ,-l Indicates that the transaction statistics are written to log, The rest is postgres Connection related parameters
Above parameters , It can also be seen with the help of commands

/usr/pgsql-13/bin/pgbench -M prepared -r -c 8 -j 2 -T 10 -U user001 -h 10.6.8.238 -p 5432 -d db001 -l

Execution results

transaction type: <builtin: TPC-B (sort of)>
scaling factor: 2
query mode: prepared
number of clients: 8
number of threads: 2
duration: 10 s
number of transactions actually processed: 10945
latency average = 7.721 ms
tps = 1036.127306 (including connections establishing)
tps = 1036.693062 (excluding connections establishing)
statement latencies in milliseconds:
         0.017  \set aid random(1, 100000 * :scale)
         0.015  \set bid random(1, 1 * :scale)
         0.014  \set tid random(1, 10 * :scale)
         0.013  \set delta random(-5000, 5000)
         0.572  BEGIN;
         0.640  UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid;
         0.649  SELECT abalance FROM pgbench_accounts WHERE aid = :aid;
         1.214  UPDATE pgbench_tellers SET tbalance = tbalance + :delta WHERE tid = :tid;
         3.341  UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid;
         0.636  INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);
         0.411  END;