Disk Performance
Disk Performance Troubleshooting Tools
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lsof
We can use the lsof command to check what parts of a disk a process is accessing.
lsof -p pid
lsof -c command------------------------------------------------------------------------------------------------------------------------------------------------
systat tools
The sysstat package includes a collection of performance monitoring tools for Unix-like systems.
iotop
iotop [options]| -a | aggregate disk IO over time (duration of command) |
iostat
Similar to iotop. Provides statistical information about I/O device loading. It reports on CPU utilization, device I/O statistics, and system throughput, making it useful for overall system performance analysis.
iostatioping
ioping is basically the ping command but for disks. It is used to measure the IO latency of storage devices - basically it measures how long a storage device will take to respond to an I/O request.
ioping [options] target| -c | specify a number of IO requests to make |
| -i | interval between requests |
| -s | request size (default 4kb) |
| -q | suppress regular output, only show statistics |