Performance Bottlenecks in RHEL ?

[Chetan_Tiwary_]

What tool do you use to diagnose and resolve performance bottlenecks in RHEL ?

[Asma-Alfayyad]

There are several tools and techniques that can be used to diagnose and resolve performance bottlenecks in RHEL. Here are some common tools that I usually use them:

1. top / htop :  These are realtime system monitoring tools that provide an overview of CPU, memory, and process usage.
2. vmstat : This tool gives a snapshot of the system’s virtual memory statistics, including memory paging, swap usage, and CPU activity.
3. iostat : It provides information about CPU utilization and input/output statistics for devices, partitions, and network file systems.
4. netstat / ss: To diagnose network performance and identify any issues related to network connections or congestion.
5. strace: This tool traces system calls. It's useful for debugging performance bottlenecks at the process level.
6. lsof: It lists open files and their associated processes. Useful for identifying excessive file I/O.
7. systemd-analyze: Used to analyze boot-up performance and identify any delays in the boot process.
8. free: Provides a snapshot of system memory usage, including total, used, and free memory, as well as swap usage.

 9.journalctl: A log management tool for analyzing system logs, which can help identify any underlying system issues causing performance degradation.

[yukio2]

Monitoring and Profiling tools,
- top, htop
- vmstat
- iostat
- mpstat
- perf
- Systemd - analyze

Logging and reporting tools,
- auditd
- rsyslog, journalctl

and others,
tunes, powertop, nload.

[Gopinath_Pigili]

Hello,

Continuously monitor system performance to track changes and identify new bottlenecks. Use tools like top, htop, and iostat. Additionally, you can also take the help of AI Tools..!

Regards

Gopinath

[Mr_Atoz]

Primarily an OpenShift guy, been a minute since my Linux & Unix sysadmin days, but I would  use top, sar, netstat, lsof as needed.  I'll still use top on RHCOS nodes to spot check MEM consumption vs buffer/cache, high CPU processes and saturation and of course CPU steal time if I'm running on a virtualized infrastructure.

[NetTerminal]

A lot of great answers in the discussion. Along with the tried and true top and free, I'd also advocate for digging into log files.

[ArtemCC]

"top" ist TOP!