On 2011-09-14 11:53, Zhang Taile wrote: > HI > When I do RandWrite with verify, fio will use a lot of memory. The fio > will increase memory about 10MB in every second. And, the system will > become very slow, after fio start to use swap partition. > > For example, if use fio with following configuration, > [rand-write] > rw=randwrite > numjobs=32 > loops=10 > thread=1 > filename=/dev/sdb > verify=md5 > verify_interval=4k > > after minutes, top will Like this : > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 3749 root 15 0 2672m 1.5g 304m S 169.4 40.4 4:10.04 fio > > > If remove the verify from the configuration, there will be no the > memory problem. > > I guess it is a memory leak problem? It's probably not a leak, fio will use a lot of memory for your job file. Each job will maintain a full backlog of meta data for blocks written, so it can safely verify it. And you have 32 jobs, so it'll be a lot of memory. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
