Why Domino ( v11.0.1) processes do not release the buffer/cache memory or CPU resources in Linux - CentOS 8.2 | Is this normal behavior?

HCL Domino Domino Forum
, , , , , ,
1

Hello, We have the Domino server version 11.0.1 in Linux - CentOS 8.2. Most of the Domino processes are occupied the buffer/cache memory. Why the processes are not cleared /released out from memory and CPU automatically after sometimes? is this normal behavior of Domino in Linux?

Kindly find the attachment and below output. Please do suggest, thank you in advance.

PIDUserMemoryCPUSearchRun
Real memory: 31.38 GiB total / 22.97 GiB free / 22.58 GiB cached   Swap space: 31.99 GiB total / 29.75 GiB free

ID	  Owner	   Size	         Command

3244	notes	12.82 GiB	/opt/hcl/domino/notes/latest/linux/traveler

21103	notes	9.08 GiB	/opt/hcl/domino/notes/latest/linux/http

3337	notes	4.87 GiB	/opt/hcl/domino/notes/latest/linux/amgr -e 1

1593	notes	3.99 GiB	/opt/hcl/domino/notes/latest/linux/server

357301	root	3.96 GiB	/usr/bin/gnome-shell

29059	notes	3.94 GiB	/opt/hcl/domino/notes/latest/linux/router

21587	notes	3.13 GiB	/opt/hcl/domino/notes/latest/linux/smtp

3240	notes	3.07 GiB	/opt/hcl/domino/notes/latest/linux/imap

3641	notes	2.73 GiB	/opt/hcl/domino/notes/latest/linux/clrepl

1818	notes	2.49 GiB	/opt/hcl/domino/notes/latest/linux/event

3238	notes	2.29 GiB	/opt/hcl/domino/notes/latest/linux/ldap

3226	notes	2.23 GiB	/opt/hcl/domino/notes/latest/linux/adminp

3222	notes	2.2 GiB	/opt/hcl/domino/notes/latest/linux/update

3260	notes	2.02 GiB	/opt/hcl/domino/notes/latest/linux/daosmgr

3243	notes	1.98 GiB	/opt/hcl/domino/notes/latest/linux/rnrmgr

4165	notes	1.97 GiB	/opt/hcl/domino/notes/latest/linux/clrepl

3223	notes	1.97 GiB	/opt/hcl/domino/notes/latest/linux/replica

4164	notes	1.97 GiB	/opt/hcl/domino/notes/latest/linux/clrepl

3225	notes	1.97 GiB	/opt/hcl/domino/notes/latest/linux/amgr -s

4167	notes	1.97 GiB	/opt/hcl/domino/notes/latest/linux/clrepl

4157	notes	1.97 GiB	/opt/hcl/domino/notes/latest/linux/clrepl

4166	notes	1.97 GiB	/opt/hcl/domino/notes/latest/linux/clrepl

3233	notes	1.97 GiB	/opt/hcl/domino/notes/latest/linux/sched

3619	notes	1.96 GiB	/opt/hcl/domino/notes/latest/linux/cldbdir

29065	notes	1.96 GiB	/opt/hcl/domino/notes/latest/linux/mtc

3245	notes	1.96 GiB	/opt/hcl/domino/notes/latest/linux/autorepair

1739	notes	1.96 GiB	/opt/hcl/domino/notes/latest/linux/logasio NOTESLOGGER reserved

3228	notes	1.95 GiB	/opt/hcl/domino/notes/latest/linux/calconn

free -h
              total        used        free      shared  buff/cache   available
Mem:           31Gi       6.9Gi       311Mi       1.6Gi        24Gi        22Gi
Swap:          31Gi       2.2Gi        29Gi

ps -eo pid,ppid,cmd,%mem,%cpu --sort=-%mem | head

PID    PPID CMD                         %MEM %CPU

21103    1593 /opt/hcl/domino/notes/lates 15.5  194

3244    1593 /opt/hcl/domino/notes/lates 11.2  5.2

1593    1528 /opt/hcl/domino/notes/lates  5.4  2.3

3641    1593 /opt/hcl/domino/notes/lates  4.8  0.4

3223    1593 /opt/hcl/domino/notes/lates  4.7  0.9

29059    1593 /opt/hcl/domino/notes/lates  4.6  0.2

3222    1593 /opt/hcl/domino/notes/lates  4.6  3.5

3238    1593 /opt/hcl/domino/notes/lates  4.3  0.0

3233    1593 /opt/hcl/domino/notes/lates  4.2  0.2

2

Linux memory management works like this way. You may see free memory is very less this is because in linux, free memory will be shown in cache/buffer memory.

3

Hi, @Rajib Manna Thank you for your response.

If the buffer/cache memory is free memory then why Domino processes are showing used memory in below ps command. I am getting the highest memory usage alert as the processes are still in used status. Kindly refer to the below output of the ps command. Thank you.

ID	  Owner	   Size	         Command
3244	notes	12.82 GiB	/opt/hcl/domino/notes/latest/linux/traveler
21103	notes	9.08 GiB	/opt/hcl/domino/notes/latest/linux/http
3337	notes	4.87 GiB	/opt/hcl/domino/notes/latest/linux/amgr -e 1
1593	notes	3.99 GiB	/opt/hcl/domino/notes/latest/linux/server
357301	root	3.96 GiB	/usr/bin/gnome-shell
29059	notes	3.94 GiB	/opt/hcl/domino/notes/latest/linux/router
21587	notes	3.13 GiB	/opt/hcl/domino/notes/latest/linux/smtp
3240	notes	3.07 GiB	/opt/hcl/domino/notes/latest/linux/imap
3641	notes	2.73 GiB	/opt/hcl/domino/notes/latest/linux/clrepl
1818	notes	2.49 GiB	/opt/hcl/domino/notes/latest/linux/event
3238	notes	2.29 GiB	/opt/hcl/domino/notes/latest/linux/ldap
3226	notes	2.23 GiB	/opt/hcl/domino/notes/latest/linux/adminp
3222	notes	2.2 GiB	/opt/hcl/domino/notes/latest/linux/update
3260	notes	2.02 GiB	/opt/hcl/domino/notes/latest/linux/daosmgr
3243	notes	1.98 GiB	/opt/hcl/domino/notes/latest/linux/rnrmgr
4165	notes	1.97 GiB	/opt/hcl/domino/notes/latest/linux/clrepl
3223	notes	1.97 GiB	/opt/hcl/domino/notes/latest/linux/replica
4164	notes	1.97 GiB	/opt/hcl/domino/notes/latest/linux/clrepl
3225	notes	1.97 GiB	/opt/hcl/domino/notes/latest/linux/amgr -s
4167	notes	1.97 GiB	/opt/hcl/domino/notes/latest/linux/clrepl
4157	notes	1.97 GiB	/opt/hcl/domino/notes/latest/linux/clrepl
4166	notes	1.97 GiB	/opt/hcl/domino/notes/latest/linux/clrepl
3233	notes	1.97 GiB	/opt/hcl/domino/notes/latest/linux/sched
3619	notes	1.96 GiB	/opt/hcl/domino/notes/latest/linux/cldbdir
29065	notes	1.96 GiB	/opt/hcl/domino/notes/latest/linux/mtc
3245	notes	1.96 GiB	/opt/hcl/domino/notes/latest/linux/autorepair
1739	notes	1.96 GiB	/opt/hcl/domino/notes/latest/linux/logasio NOTESLOGGER reserved
3228	notes	1.95 GiB	/opt/hcl/domino/notes/latest/linux/calconn
4

These are virtual memory used by each of domino processes. if you are suspecting domino processes consuming high memory, run couple manual nsds & raise a case with support for review.

5

Sure, thank you for your response.

6

Just to add, agree with Rajib, this has been Linux memory management in all application(not just when Domino is running).


https://www.linuxatemyram.com/