Hello all, We've been encountering numerous instances where GUI page would be very slow to load and sometimes lead to crash. Workaround is always restarting the tomcat httpd services but frequency has been increasing recently. I have a SOL article pointing it memory leaks to be the case but it was also stated in there that it was already fixed in 11.4.0. We are currently in 11.6.0. Anyone experiencing same issue>

What is your memory usage if you look at statistics? Can you see the memory usage climb over time? Do you use tmsh as default shell for users? That could be a real memory hog. /Patrik

Hello Patrik, I compared the usage of this unit with other boxes and I see that it does have unusually higher usage. System Memory Other is at 50%.

Other is usage of processes other than the TMM. Can you paste the output of top, press o and then Q (note the capital Q)?

Here's what I got: top - 15:42:06 up 251 days, 15:38, 4 users, load average: 1.41, 1.28, 1.25 Tasks: 581 total, 5 running, 576 sleeping, 0 stopped, 0 zombie Cpu(s): 8.0%us, 11.5%sy, 0.0%ni, 80.4%id, 0.0%wa, 0.0%hi, 0.1%si, 0.0%st Mem: 49555080k total, 49191028k used, 364052k free, 610976k buffers Swap: 1048568k total, 20280k used, 1028288k free, 1724880k cached PID USER PR NI RES VIRT SHR S %CPU %MEM TIME+ COMMAND 18062 root 1 -19 133m 42.9g 112m S 107.3 0.3 86700:10 tmm 22998 root RT 0 0 0 0 S 80.1 0.0 41847:24 enforcer/13 23015 root RT 0 0 0 0 R 80.1 0.0 41843:06 enforcer/17 23044 root RT 0 0 0 0 R 80.1 0.0 41843:41 enforcer/21 18061 root 1 -19 135m 42.9g 114m S 21.5 0.3 51534:42 tmm 9083 root 20 0 45m 56624 19m S 8.3 0.1 28890:21 bcm56xxd 7942 root 20 0 18m 26876 10m S 5.6 0.0 17383:59 csyncd 9082 root 20 0 12m 170m 6716 S 5.3 0.0 11422:53 chmand 9311 root 20 0 109m 172m 19m S 3.0 0.2 10720:16 mcpd 7365 root 20 0 1280 2844 832 S 2.6 0.0 0:00.08 rsync 12259 root 20 0 880 1952 696 S 2.3 0.0 5579:06 LCDd 6673 root 20 0 1436 2708 856 R 0.7 0.0 0:00.07 top 7795 root 20 0 47m 65644 3316 S 0.7 0.1 8101:25 statsd 8249 root 20 0 38m 40452 30m S 0.7 0.1 2489:19 sod 17362 tomcat 20 0 232m 357m 5388 S 0.7 0.5 1531:28 java 53 root 20 0 0 0 0 S 0.3 0.0 806:33.25 ksoftirqd/12 106 root 20 0 0 0 0 S 0.3 0.0 26:46.29 events/7 3507 apache 20 0 18m 69452 3404 S 0.3 0.0 0:00.81 httpd 9080 root 20 0 8424 28040 3856 S 0.3 0.0 335:41.76 alertd 9544 root 25 5 28m 92852 20m S 0.3 0.1 3406:22 merged 1 root 20 0 584 2180 528 S 0.0 0.0 9:46.92 init 2 root 20 0 0 0 0 S 0.0 0.0 0:03.45 kthreadd 3 root RT 0 0 0 0 S 0.0 0.0 0:00.04 migration/0 4 root 20 0 0 0 0 S 0.0 0.0 0:02.60 ksoftirqd/0 5 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0 6 root RT 0 0 0 0 S 0.0 0.0 0:14.00 watchdog/0 7 root RT 0 0 0 0 S 0.0 0.0 0:31.18 migration/1 8 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/1 9 root 20 0 0 0 0 S 0.0 0.0 6:41.09 ksoftirqd/1 10 root RT 0 0 0 0 S 0.0 0.0 0:10.88 watchdog/1 11 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/2 12 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/2 13 root 20 0 0 0 0 S 0.0 0.0 3:58.88 ksoftirqd/2 14 root RT 0 0 0 0 S 0.0 0.0 0:08.64 watchdog/2 15 root RT 0 0 0 0 S 0.0 0.0 7:51.92 migration/3 16 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/3 17 root 20 0 0 0 0 S 0.0 0.0 4:25.52 ksoftirqd/3

Send the output of this command too? ps aux | awk '{if($6 > 10000){$6=$6/1000 " MB";print $6 " " $11}}' Please use the pre-formatted option in the forum (mark the text and hit CTRL + k). It's easier to read. /Patrik

WebUI always crashing and slow

22 Replies

Patrik_Jonsson
MVP
Feb 02, 2017
Also run
tmsh show sys memory
please?

/Patrik
Balancing_Harmo
Nimbostratus
Feb 02, 2017
Yeah, this is not pre-installed in F5.
Patrik_Jonsson
MVP
Feb 02, 2017
That might bite you in the a** if you call F5 support. Just some heads up. :)

/Patrik
Balancing_Harmo
Nimbostratus
Feb 02, 2017
I see..
Patrik_Jonsson
MVP
Feb 02, 2017
Now, to make this thread even more full of juicy information, could you please provide the output from
tmsh show sys memory
that I asked for earlier?

/Patrik
Balancing_Harmo
Nimbostratus
Feb 02, 2017
Maybe I'll just this privately to you this time. :)
Patrik_Jonsson
MVP
Feb 02, 2017
That's an insane system you got there, and it does not looks like it's taxed in terms of memory in the TMM either. If I were you I'd uninstall the splunkd daemon and contact F5 (or if you're courageous, don't and call them anyway).

Please feel free to post the solution here later? Sorry that I can't do more.

/Patrik
Balancing_Harmo
Nimbostratus
Feb 02, 2017
Yeah, I will update this one in case I get to find the solution. You've helped so much already. Thanks!
Yazid_Abdesslam
Nimbostratus
Sep 10, 2018
Hello,

I've Been reading this case & I'm exactly in the same situation. WebGUI becomes unusable, it works when restarting httpd service "bigstart restart httpd"

SSH is fine bug HTTPS is slow & Goes down after seconds.
- jaikumar_f5
  Noctilucent
  Sep 11, 2018
  Yazid,
  
  This would happen when some resource is eating the memory. Can you open a F5 case and upload the qkview for them to review.
- Balancing_Harmo
  Nimbostratus
  Sep 11, 2018
  Hello Yazid/everyone,
  
  Apologies for not updating this thread before, but what we managed to do to stop the crash of webui was adding additional parameters in /etc/tomcat/server.xml:
  
  redirectPort="8443" enableLookups="true" address="127.0.0.1" maxParameterCount="32500" maxConnections="10" <==== Add this parameter to match the Apache MaxClients value keepAliveTimeout="5000" <=====Add this parameter to define a timeout of 5000 milliseconds (or whatever value you want to use) tomcatAuthentication="false" />
  
  And then restart httpd and tomcat service.
  
  Hope this helps!
youssef1
Cumulonimbus
Sep 11, 2018
Hi dude,

I alredy had this kind of behaviour, I advise you to modify "management ressource provisioning"

-Go to : System ›› Resource Provisioning : Module Allocation - For Management (MGMT) module switch from small to large. it will help you improve the fluidity of the GUI.

For information I had encounter this behaviour because of Large configuration embeded on the same device (ASM, APM, LTM...).

Let me know if this tips help you.

Regards