[Pkg-tigervnc-devel] Bug#989089: Fwd: Bug#989089: tigervnc-standalone-server: when a vncserver instance is invoked, mate-panel starts grabbing memory

Sat May 29 07:54:28 BST 2021

-------- Weitergeleitete Nachricht --------
Betreff: 	Re: [Pkg-tigervnc-devel] Bug#989089:
tigervnc-standalone-server: when a vncserver instance is invoked,
mate-panel starts grabbing memory
Datum: 	Sat, 29 May 2021 08:52:56 +0200
Von: 	deltagamma1 at gmx.net <deltagamma1 at gmx.net>
An: 	Ola Lundqvist <opal at debian.org>

The relevant machine has 8 GB RAM, 2 GB RAM is fix reserved for oracle
DB 18c xe.

As you can see here

[user__at__machine:pts/4 ~/.vnc]$ date && free -tm
Fr 30. Apr 16:09:49 CEST 2021
              total        used        free      shared  buff/cache  
available
Mem:           7978        2761         891        1278       
4325        3636

3.6 GB available memory before starting vncserver on 30. April  ...

===  after some days  ======================
[user__at__machine:pts/4 ~/.vnc]$ date && sudo pmap 8903 | head -10
Do 6. Mai 13:21:39 CEST 2021
[sudo] Passwort für user:
8903:   mate-panel
000055ec1bd26000    128K r---- mate-panel
000055ec1bd46000    324K r-x-- mate-panel
000055ec1bd97000    140K r---- mate-panel
000055ec1bdba000     16K r---- mate-panel
000055ec1bdbe000      4K rw--- mate-panel
000055ec1cb34000 1698228K rw---   [ anon ]
00007f9e90000000   1416K rw---   [ anon ]
00007f9e90162000  64120K -----   [ anon ]
00007f9e94000000   1448K rw---   [ anon ]
[user__at__machine:pts/4 ~/.vnc]$
[user__at__machine:pts/4 ~/.vnc]$ date && free -tm

After 6 days, on 6 May mate-panel has grabbed more than 1698228K  ==>
1.69 GB,
the available memory sunk to 2 GB , the difference is approx. the 1.6 GB
that mate-panel has grabbed.

[user__at__machine:pts/4 ~/.vnc]$ date && free -tm
Do 6. Mai 13:24:07 CEST 2021
              total        used        free      shared  buff/cache  
available
Mem:           7978        4357         541        1268       
3079        2049
Swap:          6649        2554        4095
Total:        14628        6912        4636
[user__at__machine:pts/4 ~/.vnc]$

After killing the vncserver now, on 6. May, the mate-panel process
disappeared also ( it seems there is a strong interaction between
tigervnc-standalone-server and mate-panel ) , the new available memory
is also again around 3.6 GB
which indicates again that mate-panel has grabbed the difference between
the 2 "avaibale memory" states, namely 3.6GB and 2.0GB

On a reference machine, same Debian buster, same 8 GB RAM, but DB not
installed yet, the mate-panel has stable about 35 MB memory , after a
week with a running vncserver:

=========  reference machine with running vncserver AND connected client for a week ======

user__at__refmachine:~/.vnc$ sudo pmap 19726 |head -10
19726:   mate-panel
0000558100ac1000    128K r---- mate-panel
0000558100ae1000    324K r-x-- mate-panel
0000558100b32000    140K r---- mate-panel
0000558100b55000     16K r---- mate-panel
0000558100b59000      4K rw--- mate-panel
000055810215e000  35224K rw---   [ anon ]
00007fcc30000000    132K rw---   [ anon ]
00007fcc30021000  65404K -----   [ anon ]
00007fcc34000000    132K rw---   [ anon ]
user__at__refmachine:~/.vnc$

I think the relevant address, process, is the first  [ anon ]  entry in the pmap listing of the mate-panel.

It is about 35 MB at ref-machine,

and started with about 13 MB  { 00005620203f9000  13064K rw---   [ anon ] }  on the production machine
to 266 MB { 00005620203f9000 266824K rw---   [ anon ] } 1 day later  on the production machine
up to 1.69 GB {  000055ec1cb34000 1698228K rw---   [ anon ] } after 1 week on the production machine, where I killed/stopped the vncserver.

I let the mate-panel reach also between 2.5 GB and 3 GB before I killed the vncserver, the mate-panel process disappeared also,
and the freed memroy  corresponded to the memory mate-panel has grabbed.

The displayed lines are all protocolled in the 2 attached files.

Hope this clarifies the case.

Greets

Am 26.05.2021 um 08:27 schrieb Ola Lundqvist:
> Hi
>
> When you are referring to "grabbing memory" how much are you expecting
> mate-panel to use?
> Is it much more than what the mate-panel use to use in other X servers?
> I can see that mate-panel use some 70 to 100 MB memory but since I
> have no knowledge about this software I cannot tell whether that is a
> lot of not.
>
> Cheers
>
> // Ola
>
> On Tue, 25 May 2021 at 18:19, deltagamma1 at gmx.net
> <mailto:deltagamma1 at gmx.net> <deltagamma1 at gmx.net
> <mailto:deltagamma1 at gmx.net>> wrote:
>
>     forgot to attach some files
>
>
>
>     _______________________________________________
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>
>
> --
>  --------------------- Ola Lundqvist ---------------------------
> /  opal at debian.org <mailto:opal at debian.org>                   
>  ola at inguza.com <mailto:ola at inguza.com>                  \
> |  http://inguza.com/                 +46 (0)70-332 1551       |
>  ---------------------------------------------------------------
>
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