Chapter 4. Troubleshooting
In this chapter, we will learn several techniques to track sources of poor performance or stop potential outages before they occur. We will cover the following recipes in this chapter:
- Performing triage
- Installing common statistics packages
- Evaluating the current disk performance with iostat
- Tracking I/O-heavy processes with iotop
- Viewing past performance with sar
- Correlating performance with dstat
- Interpreting /proc/meminfo
- Examining /proc/net/bonding/bond0
- Checking the pg_stat_activity view
- Checking the pg_stat_statements view
- Debugging with strace
- Logging checkpoints properly
