Tcpdump: verbose output suppressed, use -v or -vv for full protocol decode The following tcpdump command example displays captured packets in ASCII. Using tcpdump you can capture the packets and analyze it for any performance bottlenecks. More SAR examples: How to Install/Configure Sar (sysstat) and 10 Useful Sar Command Examples “1 3” indicates that the sar -b will be executed for every 1 second for a total of 3 times. The following “sar -b” command reports I/O statistics.
The following sar command will display the system CPU statistics 3 times (with 1 second interval). The following are some of the things you can do using sar utility. Using sar utility you can do two things: 1) Monitor system real time performance (CPU, Memory, I/O, etc) 2) Collect performance data in the background on an on-going basis and do analysis on the historical data to identify bottlenecks. However this list has enough tools for you to play around and pick the one that is suitable your specific debugging and monitoring scenario. This list is not comprehensive or authoritative by any means. I’ve compiled 25 performance monitoring and debugging tools that will be helpful when you are working on Linux environment.
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