nepomukservicestub eating 12% RAM

[P]

Binary package hint: kdebase-runtime

I dont know if this is a normal behaviour but I noticed that the command "/usr/bin/nepomukservicestub nepomukbackupsync" is constantly eating 12% of my 4G RAM which is nearly 500Mb of RSS

I dont think this is a normal bahaviour. See Attached htop screen shot.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: kdebase-runtime 4:4.6.2-0ubuntu1
Uname: Linux 2.6.38-02063802-generic x86_64
Architecture: amd64
Date: Wed May 4 19:56:56 2011
InstallationMedia: Kubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427)
ProcEnviron:
 LANGUAGE=
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: kdebase-runtime
UpgradeStatus: Upgraded to natty on 2011-04-29 (5 days ago)

[Domlyons-n (domlyons-n)]

Version: unspecified (using KDE 4.6.0)
OS: Linux

At the moment a nepumikservices process eats more than 7 GB RAM. This doesn't happen every day but every few days.

I can't imagine how this can happen as nepomuk is restricted to 256 MB in systemsettings and soprano-virtuoso.db is "only" about nearly 900 MB.

What is noticeable:

* Internet access was broken for more than half an hour - could that have a (crazy) impact? I guess it at least should not...

* After connection was there again Akonadi neither reconnected GMail IMAP nor Kolab disconnected IMAP - but I guess that shouldn't do Nepomuk any harm

* Today Nepomuk backup was scheduled at 21.00. I didn't recognize if excessive RAM usage just started that time... But else than Bug 265510 ("Nepomuk backup eating too much memory when creating backup file") I don't seem to have a big temp-file.
But all that ps can say it seems to be a problem with the backup (see below)

$ ps -AF | grep nepomuk
dominic 2081 1 0 52815 9432 0 18:41 ? 00:00:00 /usr/bin/nepomukserver
dominic 2086 2081 12 190888 139352 3 18:41 ? 00:32:43 /usr/bin/nepomukservicestub nepomukstorage
dominic 2103 2017 0 74585 22008 3 18:41 ? 00:00:06 /usr/bin/akonadi_nepomuk_calendar_feeder --identifier akonadi_nepomuk_calendar_feeder
dominic 2104 2017 0 73921 22088 2 18:41 ? 00:00:06 /usr/bin/akonadi_nepomuk_contact_feeder --identifier akonadi_nepomuk_contact_feeder
dominic 2105 2017 0 110529 32516 2 18:41 ? 00:00:09 /usr/bin/akonadi_nepomuk_email_feeder --identifier akonadi_nepomuk_email_feeder
dominic 2394 2081 0 91383 21996 0 18:42 ? 00:00:09 /usr/bin/nepomukservicestub nepomukqueryservice
dominic 2395 2081 0 109306 26128 3 18:42 ? 00:00:23 /usr/bin/nepomukservicestub nepomukfilewatch
dominic 2400 2081 12 1911954 7253580 3 18:42 ? 00:32:17 /usr/bin/nepomukservicestub nepomukbackupsync
dominic 2402 2081 0 123711 32952 5 18:42 ? 00:00:08 /usr/bin/nepomukservicestub digikamnepomukservice
dominic 2403 2081 0 141079 51976 5 18:42 ? 00:01:38 /usr/bin/nepomukservicestub nepomukstrigiservice
dominic 2404 2081 0 89432 22536 0 18:42 ? 00:00:08 /usr/bin/nepomukservicestub nepomukremovablestorageservice
dominic 5296 2145 0 2595 852 1 23:07 pts/0 00:00:00 grep --color=auto nepomuk

And that's what ksysguard says:

Process 2400 - nepomukservices

Summary
--------------------------------------------------
The process nepomukservices (with pid 2400) is using approximately 6.9 GB of memory.
It is using 6.9 GB privately, and a further 17.3 MB that is, or could be, shared with other programs.
Dividing up the shared memory between all the processes sharing that memory we get a reduced shared memory usage of 346.0 KB. Adding that to the private usage, we get the above mentioned total memory footprint of 6.9 GB.
4.0 KB is swapped out to disk, probably due to a low amount of available memory left.

Library Usage
--------------------------------------------------
The memory usage of a process is found by adding up the memory usage of each of its libraries, plus the process's own h...

[Domlyons-n (domlyons-n)]

> Steps to Reproduce:
> That's a really good question...

Well, maybe I wrote this a bit too quick...

I've started a manual nepomuk backup. It looked really fine for over an hour (seemed to be slow but low RAM usage) until nearly at the end. In the last few minutes a huge amount of heap memory was reserved (again over 7 GB) and was not given free after the backup was finished.

The backup itself is quite small, about 65 MB compressed and less than 750 MB uncompressed.

So I assume this is a duplicate of Bug 265510 or the other way round...

The same information as before, but a bit shortened:

$ ps -FA | grep nepomuk
[...]
dominic 2403 2081 0 141079 932 5 Feb07 ? 00:01:38 /usr/bin/nepomukservicestub nepomukstrigiservice
dominic 2404 2081 0 89432 788 3 Feb07 ? 00:00:08 /usr/bin/nepomukservicestub nepomukremovablestorageservice
dominic 5347 2081 38 1912516 7075316 5 Feb07 ? 00:29:18 /usr/bin/nepomukservicestub nepomukbackupsync
[...]

Process 5347 - nepomukservices

Summary
--------------------------------------------------
The process nepomukservices (with pid 5347) is using approximately 6.7 GB of memory.
It is using 6.7 GB privately, and a further 596.0 KB that is, or could be, shared with other programs.
Dividing up the shared memory between all the processes sharing that memory we get a reduced shared memory usage of 2.0 KB. Adding that to the private usage, we get the above mentioned total memory footprint of 6.7 GB.
159.3 MB is swapped out to disk, probably due to a low amount of available memory left.
[...]

Private
--------------------------------------------------
7074816 KB [heap]
36 KB /usr/lib/libQtGui.so.4.7.0
[...]

Totals
--------------------------------------------------
Private 7074936 KB (= 200 KB clean + 7074736 KB dirty)
Shared 596 KB (= 596 KB clean + 0 KB dirty)
Rss 7075532 KB (= Private + Shared)
Pss 7074938 KB (= Private + Shared/Number of Processes)
Swap 163088 KB

[Domlyons-n (domlyons-n)]

Still the same in KDE 4.6.1

[Nico-kruber (nico-kruber)]

same here, virtuoso-t using 760MB RAM although set not to use more than 256MB

I had a lot of files that strigi had to analyse, but strigi is currently disabled - didn't change the RAM usage though :(

[P (p92)]

Created attachment 59626
htop showing nepomukservicestub eating memory

[Jan Schnackenberg (yehaa)]

I'm seeing the same thing here.

The process "/usr/bin/nepomukservicestub nepomukbackupsync" uses 1.7GB private memory. The private heap being 1772416KB.

Ok, I've still got enough memory left, but this is kind of ridiculous for something I really hardly ever use.

[Domlyons-n (domlyons-n)]

*** This bug has been confirmed by popular vote. ***

[Domlyons-n (domlyons-n)]

Having this problem every monday (this time eating more than 8 GB RAM over a long time) im pretty sure this bug and #265510 are duplicates.

*** This bug has been marked as a duplicate of bug 265510 ***

[Harald Sitter (apachelogger)]

Closing in favor of upstream report.