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Benchmark PostgreSQL

Sep 08, 20253 min read

These commands are for benchmarking a PostgreSQL database using sysbench, specifically focusing on OLTP (Online Transaction Processing) read-write workloads.

Pgbench

pgbench -i -s 50 -h 127.0.0.1 -p 5432 -U dba test

Command 1: Preparation Phase

sysbench oltp_read_write --db-driver=pgsql --pgsql-db=sysbench_test --pgsql-host=52.66.63.7 --pgsql-port=5432 --pgsql-user=deepak --pgsql-password=password123 --tables=1 --table-size=4000000 prepare

Explanation:

  • sysbench oltp_read_write: Indicates that you are running a test based on an OLTP read-write workload.
  • --db-driver=pgsql: Specifies that the database driver is PostgreSQL.
  • --pgsql-db=sysbench_test: Defines the target PostgreSQL database as sysbench_test.
  • --pgsql-host=52.66.63.7: Specifies the PostgreSQL server’s IP address.
  • --pgsql-port=5432: Defines the port on which PostgreSQL is listening (default is 5432).
  • --pgsql-user=deepak: Uses deepak as the PostgreSQL user for the connection.
  • --pgsql-password=password123: Specifies the password for the deepak user.
  • --tables=1: Defines the number of tables to create for the test, which is 1.
  • --table-size=4000000: Sets the size of the table to 4 million rows.
  • prepare: This prepares the test by creating and populating the tables with the specified number of rows.

Command 2: Running the Benchmark

sysbench oltp_read_write --threads=2 --db-driver=pgsql --pgsql-db=sysbench_test --pgsql-host=52.66.63.7 --pgsql-port=5432 --pgsql-user=deepak --pgsql-password=password123 --tables=1 --table-size=4000000 --time=10000 --report-interval=1 --events=0 --delete-inserts=10 --index-updates=10 --non-index-updates=10 --db-ps-mode=disable run

Explanation:

  • sysbench oltp_read_write: Again, indicates that you are running an OLTP read-write test.
  • --threads=2: Specifies that the benchmark will run with 2 parallel threads.
  • --db-driver=pgsql: PostgreSQL is the database driver in use.
  • --pgsql-db=sysbench_test: Target database is sysbench_test.
  • --pgsql-host=52.66.63.7: Specifies the PostgreSQL server’s IP address.
  • --pgsql-port=5432: PostgreSQL is listening on port 5432.
  • --pgsql-user=deepak: Uses deepak as the PostgreSQL user.
  • --pgsql-password=password123: Password for the deepak user.
  • --tables=1: Number of tables involved in the test is 1.
  • --table-size=4000000: Each table contains 4 million rows.
  • --time=10000: The benchmark will run for 10,000 seconds (approximately 2 hours and 46 minutes).
  • --report-interval=1: The progress report will be printed every second.
  • --events=0: The benchmark will run indefinitely or until the time limit is reached.
  • --delete-inserts=10: Specifies that 10% of the operations will be DELETEs followed by INSERTs (to simulate updates).
  • --index-updates=10: Indicates that 10% of the operations will be updates to indexed columns.
  • --non-index-updates=10: Indicates that 10% of the operations will be updates to non-indexed columns.
  • --db-ps-mode=disable: Disables the use of server-side prepared statements, meaning each query will be parsed and planned separately.
  • run: This command starts the actual benchmarking process.

Summary: The first command prepares the PostgreSQL database by creating a table and populating it with 4 million rows. The second command runs a read-write performance test on this table using 2 parallel threads for 10,000 seconds, with specific operational percentages for deletes, inserts, and updates.

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