Bug 635555

Summary: multipathd is a memory hog
Product: Red Hat Enterprise Linux 6 Reporter: Cyril Plisko <cplisko>
Component: device-mapper-multipathAssignee: Ben Marzinski <bmarzins>
Status: CLOSED DUPLICATE QA Contact: Red Hat Kernel QE team <kernel-qe>
Severity: medium Docs Contact:
Priority: low    
Version: 6.0CC: abaron, agk, bmarzins, christophe.varoqui, dwysocha, egoggin, heinzm, junichi.nomura, kueda, lmb, mbroz, prockai, tranlan
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2010-11-15 04:08:54 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Cyril Plisko 2010-09-20 07:20:43 UTC 
We recently noticed that on our systems (hosts running VDSM) the multipathd memory footprint is suspiciously high.

That what top shows:

 PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+ COMMAND                                                                        
1625 root      RT   0 1764m 126m 3652 S  0.0  1.6  73:23.99 multipathd                                                                     

And here is pmap -x

[root@white-vdsd ~]# pmap -x 1625
1625:   /sbin/multipathd
Address           Kbytes     RSS   Dirty Mode   Mapping
0000000000400000      64      64       0 r-x--  multipathd (deleted)
0000000000610000      12      12      12 rw---  multipathd (deleted)
0000000002294000     532     532     532 rw---    [ anon ]
0000003452800000     120     120       0 r-x--  ld-2.12.so
0000003452a1e000       4       4       4 r----  ld-2.12.so
0000003452a1f000       4       4       4 rw---  ld-2.12.so
0000003452a20000       4       4       4 rw---    [ anon ]
0000003452c00000    1492    1492       0 r-x--  libc-2.12.so
0000003452d75000    2048       0       0 -----  libc-2.12.so
0000003452f75000      16      16       8 r----  libc-2.12.so
0000003452f79000       4       4       4 rw---  libc-2.12.so
0000003452f7a000      20      20      20 rw---    [ anon ]
0000003453000000       8       8       0 r-x--  libdl-2.12.so
0000003453002000    2048       0       0 -----  libdl-2.12.so
0000003453202000       4       4       4 r----  libdl-2.12.so
0000003453203000       4       4       4 rw---  libdl-2.12.so
0000003453400000      92      92       0 r-x--  libpthread-2.12.so
0000003453417000    2048       0       0 -----  libpthread-2.12.so
0000003453617000       4       4       4 r----  libpthread-2.12.so
0000003453618000       4       4       4 rw---  libpthread-2.12.so
0000003453619000      16      16      16 rw---    [ anon ]
0000003453800000     116     116       0 r-x--  libselinux.so.1
000000345381d000    2044       0       0 -----  libselinux.so.1
0000003453a1c000       4       4       4 r----  libselinux.so.1
0000003453a1d000       4       4       4 rw---  libselinux.so.1
0000003453a1e000       4       4       4 rw---    [ anon ]
0000003453c00000     280     280       0 r-x--  libmultipath.so
0000003453c46000    2044       0       0 -----  libmultipath.so
0000003453e45000      16      16      16 rw---  libmultipath.so
0000003453e49000       4       4       4 rw---    [ anon ]
0000003454000000     136     136       0 r-x--  libncurses.so.5.7
0000003454022000    2044       0       0 -----  libncurses.so.5.7
0000003454221000       4       4       4 rw---  libncurses.so.5.7
0000003454400000     524     524       0 r-x--  libm-2.12.so
0000003454483000    2044       0       0 -----  libm-2.12.so
0000003454682000       4       4       4 r----  libm-2.12.so
0000003454683000       4       4       4 rw---  libm-2.12.so
0000003454800000     116     116       0 r-x--  libtinfo.so.5.7
000000345481d000    2048       0       0 -----  libtinfo.so.5.7
0000003454a1d000      16      16      16 rw---  libtinfo.so.5.7
0000003454c00000     240     240       0 r-x--  libsepol.so.1
0000003454c3c000    2044       0       0 -----  libsepol.so.1
0000003454e3b000       4       4       4 rw---  libsepol.so.1
0000003459000000     232     232       0 r-x--  libreadline.so.6.0
000000345903a000    2048       0       0 -----  libreadline.so.6.0
000000345923a000      32      32      32 rw---  libreadline.so.6.0
0000003459242000       4       4       4 rw---    [ anon ]
000000345b000000      56      56       0 r-x--  libudev.so.0.5.1
000000345b00e000    2048       0       0 -----  libudev.so.0.5.1
000000345b20e000       4       4       4 rw---  libudev.so.0.5.1
0000003b0b600000       4       4       0 r-x--  libaio.so.1.0.1
0000003b0b601000    2044       4       0 -----  libaio.so.1.0.1
0000003b0b800000       4       4       4 rw---  libaio.so.1.0.1
00007ff830000000   56292   56292   56292 rw---    [ anon ]
00007ff8336f9000    9244       0       0 -----    [ anon ]
00007ff838000000     132      72      72 rw---    [ anon ]
00007ff838021000   65404       0       0 -----    [ anon ]
00007ff83c000000     132      72      72 rw---    [ anon ]
00007ff83c021000   65404       0       0 -----    [ anon ]
00007ff840000000     132      72      72 rw---    [ anon ]
00007ff840021000   65404       0       0 -----    [ anon ]
00007ff844000000     132      72      72 rw---    [ anon ]
00007ff844021000   65404       0       0 -----    [ anon ]
00007ff848000000     132      72      72 rw---    [ anon ]
00007ff848021000   65404       0       0 -----    [ anon ]
00007ff84c000000     132      72      72 rw---    [ anon ]
00007ff84c021000   65404       0       0 -----    [ anon ]
00007ff850000000     132      72      72 rw---    [ anon ]
00007ff850021000   65404       0       0 -----    [ anon ]
00007ff854000000     132      72      72 rw---    [ anon ]
00007ff854021000   65404       0       0 -----    [ anon ]
00007ff858000000     132      72      72 rw---    [ anon ]
00007ff858021000   65404       0       0 -----    [ anon ]
00007ff85c000000     132      72      72 rw---    [ anon ]
00007ff85c021000   65404       0       0 -----    [ anon ]
00007ff860000000     132     108     108 rw---    [ anon ]
00007ff860021000   65404       0       0 -----    [ anon ]
00007ff864000000     132      72      72 rw---    [ anon ]
00007ff864021000   65404       0       0 -----    [ anon ]
00007ff868000000     132      72      72 rw---    [ anon ]
00007ff868021000   65404       0       0 -----    [ anon ]
00007ff86c000000     132      72      72 rw---    [ anon ]
00007ff86c021000   65404       0       0 -----    [ anon ]
00007ff870000000   65536   65536   65536 rw---    [ anon ]
00007ff874000000     132     108     108 rw---    [ anon ]
00007ff874021000   65404       0       0 -----    [ anon ]
00007ff878000000     132      20      20 rw---    [ anon ]
00007ff878021000   65404       0       0 -----    [ anon ]
00007ff87c000000     132      72      72 rw---    [ anon ]
00007ff87c021000   65404       0       0 -----    [ anon ]
00007ff880000000     132      20      20 rw---    [ anon ]
00007ff880021000   65404       0       0 -----    [ anon ]
00007ff888000000     132      20      20 rw---    [ anon ]
00007ff888021000   65404       0       0 -----    [ anon ]
00007ff890000000     132      20      20 rw---    [ anon ]
00007ff890021000   65404       0       0 -----    [ anon ]
00007ff898000000     132      72      72 rw---    [ anon ]
00007ff898021000   65404       0       0 -----    [ anon ]
00007ff8a0000000     132      20      20 rw---    [ anon ]
00007ff8a0021000   65404       0       0 -----    [ anon ]
00007ff8a8000000     132       8       8 rw---    [ anon ]
00007ff8a8021000   65404       0       0 -----    [ anon ]
00007ff8b0000000     132      96      96 rw---    [ anon ]
00007ff8b0021000   65404       0       0 -----    [ anon ]
00007ff8b8000000     132      16      16 rw---    [ anon ]
00007ff8b8021000   65404       0       0 -----    [ anon ]
00007ff8be537000    1032    1032    1032 rw---    [ anon ]
00007ff8be6b6000       4       4       4 -----    [ anon ]
00007ff8be6b7000      32      32      32 rw---    [ anon ]
00007ff8be6bf000       4       4       4 -----    [ anon ]
00007ff8be6c0000      32      32      32 rw---    [ anon ]
00007ff8be6c8000       4       4       4 -----    [ anon ]
00007ff8be6c9000      32      32      32 rw---    [ anon ]
00007ff8be6d1000       4       4       4 -----    [ anon ]
00007ff8be6d2000      32      32      32 rw---    [ anon ]
00007ff8be6da000       4       4       4 -----    [ anon ]
00007ff8be6db000      32      32      32 rw---    [ anon ]
00007ff8be6e3000       4       4       4 -----    [ anon ]
00007ff8be6e4000      32      32      32 rw---    [ anon ]
00007ff8be6ec000       4       4       4 -----    [ anon ]
00007ff8be6ed000      32      32      32 rw---    [ anon ]
00007ff8be6f5000       4       4       4 -----    [ anon ]
00007ff8be6f6000      36      36      36 rw---    [ anon ]
00007ff8be6ff000       4       4       4 -----    [ anon ]
00007ff8be700000      32      32      32 rw---    [ anon ]
00007ff8be708000       4       4       4 -----    [ anon ]
00007ff8be709000      32      32      32 rw---    [ anon ]
00007ff8be711000       4       4       4 -----    [ anon ]
00007ff8be712000      32      32      32 rw---    [ anon ]
00007ff8be71a000       4       4       4 -----    [ anon ]
00007ff8be71b000      32      32      32 rw---    [ anon ]
00007ff8be723000       4       4       4 -----    [ anon ]
00007ff8be724000      32      32      32 rw---    [ anon ]
00007ff8be72c000       4       4       4 -----    [ anon ]
00007ff8be72d000      32      32      32 rw---    [ anon ]
00007ff8be735000       4       4       4 -----    [ anon ]
00007ff8be736000      28      28      28 rw---    [ anon ]
00007ff8be73d000       4       4       4 -----    [ anon ]
00007ff8be73e000      64      64      64 rw---    [ anon ]
00007ff8be74e000       4       4       4 -----    [ anon ]
00007ff8be74f000      64      64      64 rw---    [ anon ]
00007ff8be75f000       4       4       4 -----    [ anon ]
00007ff8be760000      64      64      64 rw---    [ anon ]
00007ff8be770000       4       4       4 -----    [ anon ]
00007ff8be771000      64      64      64 rw---    [ anon ]
00007ff8be781000       4       4       4 -----    [ anon ]
00007ff8be782000      28      28      28 rw---    [ anon ]
00007ff8be789000       4       4       4 -----    [ anon ]
00007ff8be78a000      28      28      28 rw---    [ anon ]
00007ff8be791000       4       4       4 -----    [ anon ]
00007ff8be792000      28      28      28 rw---    [ anon ]
00007ff8be799000       4       4       4 -----    [ anon ]
00007ff8be79a000      28      28      28 rw---    [ anon ]
00007ff8be7a1000       4       4       4 -----    [ anon ]
00007ff8be7a2000      28      28      28 rw---    [ anon ]
00007ff8be7a9000       4       4       4 -----    [ anon ]
00007ff8be7aa000      48      48      48 rw---    [ anon ]
00007ff8be7b6000       4       4       0 r-x--  libprioconst.so
00007ff8be7b7000    2044       0       0 -----  libprioconst.so
00007ff8be9b6000       4       4       4 rw---  libprioconst.so
00007ff8be9b7000       8       8       0 r-x--  libcheckdirectio.so
00007ff8be9b9000    2044       4       0 -----  libcheckdirectio.so
00007ff8bebb8000       4       4       4 rw---  libcheckdirectio.so
00007ff8bebb9000       4       4       4 -----    [ anon ]
00007ff8bebba000      92      92      92 rw---    [ anon ]
00007ff8bebd1000     140     140       0 r-x--  libdevmapper.so.1.02.#prelink#.TNCsif (deleted)
00007ff8bebf4000    2048       0       0 -----  libdevmapper.so.1.02.#prelink#.TNCsif (deleted)
00007ff8bedf4000       8       8       8 rw---  libdevmapper.so.1.02.#prelink#.TNCsif (deleted)
00007ff8bedf6000      36      36      36 rw---    [ anon ]
00007fffcff04000      84      84      84 rw---    [ stack ]
00007fffcffff000       4       4       0 r-x--    [ anon ]
ffffffffff600000       4       0       0 r-x--    [ anon ]
----------------  ------  ------  ------
total kB         1806824  130012  126360


That is on RHEL6:

[root@white-vdsd ~]# rpm -qa | grep multip
device-mapper-multipath-0.4.9-25.el6.x86_64
device-mapper-multipath-libs-0.4.9-25.el6.x86_64
[root@white-vdsd ~]#
Comment 2 Ben Marzinski 2010-11-15 04:08:54 UTC 

*** This bug has been marked as a duplicate of bug 623644 ***