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? Thanks! -- Taile -- 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