Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi, I was wondering if someone could point me in the right direction for trouble shooting IO issues. Basically I was looking at a box with IO wait reflected in vmstat, iostat shows the underlying devices are not saturated or experiencing high wait or service times. I am guessing that I can verify DRBD health by looking at the values from /proc/drbd. pe (pending). Number of requests sent to the partner, but that have not yet been answered by the latter. # ua (unacknowledged). Number of requests received by the partner via the network connection, but that have not yet been answered. # ap (application pending). Number of block I/O requests forwarded to DRBD, but not yet answered by DRBD These look pretty interesting, am I on the right track?. Thanks, Ewen