Each target has one real LUN: USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND 0 targets ~1Gb: root 19675 0.1 9.7 1247120 1198808 ? SLs Mar30 4:51 /usr/sbin/tgtd 1 target: root 19675 0.1 9.7 1247120 1198808 ? SLsl Mar30 4:51 /usr/sbin/tgtd 10 targets: root 19675 0.1 9.7 1542176 1199096 ? SLsl Mar30 4:51 /usr/sbin/tgtd 20 targets: root 19675 0.1 9.7 1870016 1199416 ? SLsl Mar30 4:51 /usr/sbin/tgtd 30 targets: root 19675 0.1 9.7 2197856 1199736 ? SLsl Mar30 4:51 /usr/sbin/tgtd 40 targets: root 19675 0.1 9.7 2525696 1200056 ? SLsl Mar30 4:51 /usr/sbin/tgtd 50 targets: root 19675 0.1 9.7 2853536 1200376 ? SLsl Mar30 4:51 /usr/sbin/tgtd 100 targets: root 19675 0.1 9.7 4492736 1201976 ? SLsl Mar30 4:52 /usr/sbin/tgtd 200 targets: root 19675 0.1 9.7 7771136 1205176 ? SLsl Mar30 4:52 /usr/sbin/tgtd 400 targets: root 19675 0.1 9.8 14327936 1211576 ? SLsl Mar30 4:56 /usr/sbin/tgtd This 14327936, is more than memory physically installed on this node (12Gb), and i don't know what will happen, if tgtd will try to use all of this memory. So, we can see increasing VSZ field by about 30Mb per one LUN. 2011/3/31 Or Gerlitz <ogerlitz@xxxxxxxxxxxx>: > Or Gerlitz wrote: > > Hi Stepan, The iser code would allocate memory only when sessions (iser > connections) are established, there's a global pool of size 1GB > which is allocated on the 1st establishment, and later ~3MB per session, > where a session accounts to iscsi target (not lun). > > Stepan, we made a check here to validate the observations from the code > inspecting, and it seems that each (target + one session) consumes about > 4MB, so there are 700KB over the 3.3MB we saw from the code, e.g allocated > by the IB libraries, or other areas in tgt, > etc. > > Each target has one null lun, the per-target column is memory increased per > one target from previous allocation > > targets mem per-target > > 1 1230068 1230068 > > 2 1234116 4048 > > 4 1242100 3992 > > 8 1258260 4040 > > 16 1289792 3941 > > 32 1353416 3976 > > 64 1480664 3976 > > > > > > -- To unsubscribe from this list: send the line "unsubscribe stgt" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
