Tuning Linux for PostgreSQL
Tuning Linux for PostgreSQL performance can involve several steps. Here are some general steps to take:
- Optimize kernel parameters: Make sure the kernel is configured for optimal performance for PostgreSQL. This can include adjusting settings such as vm.swappiness, vm.dirty_ratio, and vm.dirty_background_ratio.
- Adjust filesystem settings: Configure the filesystem for optimal performance. This can include using the appropriate filesystem type, such as XFS or ext4, and configuring the filesystem with appropriate options such as noatime.
- Monitor memory usage: Use tools such as free, vmstat, and top to monitor memory usage and ensure that the system is not swapping heavily.
- Monitor I/O: Use tools such as iostat, iotop, and pg_top to monitor I/O usage and ensure that the system is not experiencing heavy I/O wait.
- Monitor CPU usage: Use tools such as top, htop, and pg_top to monitor CPU usage and ensure that the system is not experiencing heavy CPU load.
- Monitor network usage: Use tools such as netstat, nstat, and iftop to monitor network usage and ensure that the system is not experiencing heavy network load.
- Monitor PostgreSQL performance: Use tools such as pg_stat_activity, pg_stat_statements, and pg_top to monitor PostgreSQL performance.
- Use a better scheduler: PostgreSQL recommends using the Completely Fair Scheduler (CFS) as it is more suited for PostgreSQL.
