FOG Web GUI speed and default storage activity

[Wayne Workman]

@jgallo said in FOG Web GUI speed and default storage activity:

Is the value in seconds or minutes for the check in time in FOG?

Seconds.

[JGallo]

@wayne-workman

Ok so I have tried to decrease the client checkin time and it seems like it helps but eventually ends up causing that message. I even went to the extent of not sitting on the homepage just to make sure and after an hour I go back and check and still have those connections messages.

I will try one more thing and if this doesn’t work i will just deal with it but could I raise the number of vCPU on Hyper-V from 2 to 4? Will this help improve performance? That’s basically the only thing left to do to improve performance on the fog server. I did make the change from dynamic memory to static. thanks.

[Jim Graczyk]

@Sebastian-Roth
@george1421

Guys,

Is there any way to alter the choice of pages that the Web UI goes to upon sign in?

I’m seeing very long signin times but the web UI is mostly very fast in my installations. I’ve got 9 remotes sites, each with 1 storage node, some of the sights are connected in over 4G LTE.

Signing into FOG takes variously long times, depending on how the 9 connections are doing.

I could do without the dashboard page and the load it generates. I’d be happy if the default page were anything but the Dashboard.

Jim

[george1421]

@jim-graczyk There is not currently an option for that, but (in my limited experience it might be trivial to include that feature). The developers might include a new setting in FOG Settings->Login Settings to allow the FOG admin to change their login landing page. If you look in the url the only difference between the dashboard and any other page is just the node reference.

But then might raise the question, if not the dashboard, then what should be the default landing page? And might that landing page be different on a per user bases? (just thinking of reasons why we might not want this feature). Either way, I would surely make a feature request out of this idea. I fell it does have a moderate amount of merit.

[Wayne Workman]

@jgallo said in FOG Web GUI speed and default storage activity:

could I raise the number of vCPU on Hyper-V from 2 to 4? Will this help improve performance?

That would only help if your host system isn’t overburdened. If you have too many VMs on it already with too many cores assigned, and not enough cores available, it’ll just make things worse. But if you have plenty of resources, then it would help.

Also, set your client checkin time to something like 300 seconds (five minutes) and see if that makes a difference. Keep in mind the change here isn’t immediate - the clients have to checkin once more to actually get the new setting.

[JGallo]

@wayne-workman

I don’t have too many VM’s. I do have 4 but each of those has either 1 or 2 vCPU’s allocated to them. I have now set 4 vCPU’s for the fog server VM and I still have that issue. I also set the client checkin time to 300 with same issue.

Here is what I noticed. I see that the FOG server disk I/O is about 15% give or take on a constant basis. I also noticed that all the disk activity is from apache2 with user www-data and mysql is using up to 5GB of memory at times just on idle. Could this be some programming bug or my database needs to be cleared?

[Wayne Workman]

@jgallo How many hosts do you have in your environment that have the FOG Client installed?

[JGallo]

@wayne-workman

I don’t have any. We use Group Policy to manage printers, settings, etc. Back in the day we used the FOG Client when autojoin domain features were utilized. We don’t anymore due to large amounts of chromebooks replacing aging PC’s.

[Wayne Workman]

@jgallo What are the link speeds between the main fog server and the other nodes? How many images do you have? What’s the FOG IMAGE REP SLEEP TIME in fog settings set to?

[JGallo]

@wayne-workman

At the secondary schools, the connection speed to our district office is 1Gb and the primary schools are at 100mb. The FOG IMAGE REP SLEEP TIME is set to 10800.

[Wayne Workman]

@jgallo How consistent is the problem? The “a valid connection cannot be established” problem. Any rhyme or pattern? Is this when imaging is happening?

[JGallo]

@wayne-workman

on working branch 57 it was very consistent even with all the changes made to fog and the vCPU’s. I have been updating all the storage nodes and fog to working branch 64 today and the problem is still persistent. The only pattern I have observed is that upon rebooting the fog sever, the valid connection messages do not appear for about an hour or so. Then the messages begin to appear for random nodes that I have the graph enabled. At random times, the messages tend to go away but then come back upon selecting another storage node on the dashboard.

[Wayne Workman]

@jgallo Do you know what version of fog this problem started with?

[JGallo]

@wayne-workman

I know that I went from 1.4.4 to 1.5.0 RC1 if I recalled. I know when I upgraded I made a huge leap. New interface and all. During that time there were replication issues and eventually updated to 1.5.0 RC7 which still had replication issues. I then upgraded to 1.5.0 RC9 which replication had major issue that was resolved in a working branch. So I have been on working branch 57 until about an hour ago I went to 64 with all nodes and fog server. I have been observing this issue since I have been on 1.5.0 from the new interface. I never had this issue in 1.4.4

[Wayne Workman]

@jgallo said in FOG Web GUI speed and default storage activity:

The only pattern I have observed is that upon rebooting the fog sever, the valid connection messages do not appear for about an hour or so.

I’m thinking about this - I’d like you to try to restart only Apache and see if it has the same effect or not. On CentOS/Fedora/RHEL it’s systemctl restart httpd and on Ubuntu 16/Debian8/Debian9 it’s systemctl restart apache2 and on Ubuntu 14-,debian7- it’s service apache2 restart

[JGallo]

@wayne-workman

Tried that and still get the database connection message.

[Wayne Workman]

@jgallo During when the problem is happening, what does this command return? free -h;uptime

[JGallo]

@wayne-workman
I have rebooted due to upgrade to working branch. FYI.

             total        used        free      shared  buff/cache   available
Mem:            15G        510M        181M         47M         14G         14G
Swap:          4.0G        268K        4.0G
 15:59:54 up  1:56,  2 users,  load average: 0.24, 0.19, 0.21```

[Wayne Workman]

@jgallo You have 14GB cached in RAM, which I’ll say is substantial. You can clear that with the below command:
sudo sh -c "sync; echo 3 > /proc/sys/vm/drop_caches"
Does the issue resolve after this? Also, check free -h afterwards.

[JGallo]

@wayne-workman

went down to 139MB. LOL dam that was a lot of cache. Wish I had it in my pocket.