Re: high load, no bottleneck

[mlelstv%serpens.de@localhost (Michael van Elst)]

ef%math.uni-bonn.de@localhost (Edgar =?iso-8859-1?B?RnXf?=) writes:

>I myself can't make sense out of the combination of
>-- vfs.wapbl.flush_disk_cache=0 mitigating the problem
>-- neither the RAID set nor its components showing busy in iostat
>Maybe during a flush, the discs are not regarded busy?

busy means that the driver is executing I/O requests or waiting for
results from such operartions. The cache flush operation doesn't
count by itself, but it slows down parallel I/O operations, so the
disk appears busy as long as there are such I/O operations.