2 ms·
If the SSDs were really maxed out you'd see high CPU usage/load as the CPU as blocked by IOWAIT.
by winrid 4y ago
If the SSDs were really maxed out you'd see high CPU usage/load as the CPU as blocked by IOWAIT.
- marginalia_nu 4y agoNot in this case, it's all mmap.
- winrid 4y agoReally? Even with mmapp'ed memory won't the CPU still register user code waiting on reading pages from disk as iowait? I'm so surprised by that that if it doesn't it sounds like a bug.
- marginalia_nu 4y agoYeah it's at least what I've been seeing. Although it could alternatively be that a lot of the I/O activity is predictive reads, and the threads don't actually stall on page faults all I/O that often.