License block: Vezha features
What it shows
Process IOWAIT in Vezha uses proc.iowait_ticks. On Linux, the agent reads /proc/<pid>/stat and collects the block I/O wait counter delayacct.
Why it matters
This allows you to separate “the process is really counting” from “the process is waiting for the disk”. Such a difference is critical for making the right decision: whether to optimize code, queries, or disk footprint.
An example from practice
The process looked active, but the delays were specifically related to I/O waiting. After moving the hot files to a faster disk, the execution time stabilized.