License block: Vezha features
What it shows
DISK read, kbps in Vezha is formed from disk.read_kib_s. On Linux, the agent reads counters /proc/diskstats and calculates the derivative per second by physical devices.
Why it matters
The metric shows when a node begins to “live off disk” and loses performance due to excessive reads. This is critical for databases, search indexes, and cold data caches.
An example from practice
During the morning cache warm-up, the read speed jumped dramatically and delayed the API response. After optimizing the warm-up order, the average response time evened out.