Hello, I apply the echo 0 > /sys/block/vdc/queue/wbt_lat_usec at the production servers. I expect it will disable wbt. Could you please confirm that my expectation is correct? The issue is happening once per ~14-30d after some random higher IOps (~25-100k) peak so we need to wait.... Best, st 5. 10. 2022 v 23:03 odesílatel Bart Van Assche <bvanassche@xxxxxxx> napsal: > > On 10/5/22 12:43, Jaroslav Pulchart wrote: > > I'm investigating a queue hangup issue of our databases running on the > > 5.19.y kernel. > > > > I found "Write I/O queue hangup at random on recent Linus' kernels" > > thread (https://www.spinics.net/lists/linux-bcache/msg10781.html) > > already fixed some time. > That message mentions WBT (write back throttling). Is WBT enabled in > your kernel? If so, does disabling it help? > > Thanks, > > Bart. -- Jaroslav Pulchart Sr. Principal SW Engineer GoodData
