Bug 541911

Summary: dmeventd uses lot of memory
Product: [Fedora] Fedora Reporter: Juan Quintela <quintela>
Component: device-mapper-obsoleteAssignee: Zdenek Kabelac <zkabelac>
Status: CLOSED NEXTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: 12CC: agk, bmarzins, dwysocha, heinzm, lvm-team, mbroz, msnitzer, prajnoha, prockai, zkabelac
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OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2010-06-14 15:29:11 UTC Type: ---
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lvmdump data none

Description Juan Quintela 2009-11-27 14:41:53 UTC 
Description of problem:

deventd uses 648M virtual memory, 100M RSS (97M shared)

Line from top
 1173 root       2 -18  648m 110m  97m S  0.0  5.5   0:00.22 dmeventd           

Version-Release number of selected component (if applicable):

device-mapper-event-1.02.38-2.fc12.x86_64

How reproducible:

It happens always. After boot, dmeventd is using so much memory, it don't
increase it, but it don't free it either.

Steps to Reproduce:
Just boot, my lvm setup is:
[root@trasno ~]# lvs
  LV      VG     Attr   LSize   Origin Snap%  Move Log         Copy%  Convert
  backup  trasno mwi-a- 300.00G                    backup_mlog 100.00        
  home    trasno mwi-ao   3.91G                    home_mlog   100.00        
  images  trasno -wi-ao 100.00G                                              
  mirror  trasno -wi-ao 123.94G                                              
  ro      trasno -wi-ao  10.03G                                              
  root    trasno mwi-ao 768.00M                    root_mlog   100.00        
  scratch trasno -wi-ao  63.84G                                              
  srv     trasno mwi-ao   5.00G                    srv_mlog    100.00        
  swap    trasno mwi-ao   1.94G                    swap_mlog   100.00        
  tmp     trasno mwi-ao 576.00M                    tmp_mlog    100.00        
  usr     trasno mwi-ao   4.91G                    usr_mlog    100.00        
  var     trasno mwi-ao   3.91G                    var_mlog    100.00        


Actual results:

Uses too much physical memory.

Expected results:

That it uses less memory.

Additional info:
Comment 1 Juan Quintela 2009-11-27 14:45:15 UTC 
Created attachment 374222 [details]
lvmdump data
Comment 2 Juan Quintela 2009-11-27 15:43:27 UTC 
Peter Rockai helped fix the problem on irc.  The problem was the locale (en_US.UTF-8).  Doing:

* vgchange --monitor n
* killall -9 dmeventd
* LC_ALL=C vgchange --monitor y
Comment 3 Juan Quintela 2010-02-24 19:33:16 UTC 
*** Bug 553193 has been marked as a duplicate of this bug. ***
Comment 4 Zdenek Kabelac 2010-02-25 09:24:01 UTC 
Here is discussion about this issue:

https://www.redhat.com/archives/lvm-devel/2010-February/msg00208.html

Currently we work on the solution that will try to avoid mmaping file locale-archive into memory during locked state.
Comment 5 Zdenek Kabelac 2010-05-05 10:20:25 UTC 
Memory usage has been decreased in LVM2 version 2.02.63 for dmeventd and clvmd. Currently new packages are available for fc14.
Comment 6 Peter Rajnoha 2010-06-14 15:29:11 UTC 
I don't think this will get into an F-12 update. Closing with "nextrelease".