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View Full Version : what do these listings and terms mean...?


stapel
02-15-2006, 03:07 PM
I'm trying to be a responsible user and keep track of what's happening on my server, but I don't know what some of these listings mean. And the documentation for WebHost Manager (WHM) seems, well, a bit too cryptic for this old haus-frau. ;)

In the "Today's CPU Usage" display yesterday morning, there was the following:
Note: Percentages are based on one cpu.
If you have 2 cpus divide the number in half
to get the percentage of all cpu power used

User Domain %CPU %MEM Mysql Processes
[user] [domain] 10.20 0.00 0.0

Top Process %CPU 7.0 httpd [domain] [/filename1.gif]
Top Process %CPU 6.5 httpd [domain] [/filename2.gif]
Top Process %CPU 6.2 httpd [domain] [/filename3.gif]
The second row after the "Note" (the "[user] [domain]" line) was highlighted in yellow, and by the end of the day had turned red. Should I be worrying?

(Note: I'm on a virtual-private-server account, with "AMD Dual Opteron Server" and "512MB RAM Guaranteed, 2048MB RAM Burstable".)


At the same time as the above display, the "Service Status" display showed the following:
Server Load 0.80 (2 cpus)
Memory Used 61.6 %
Swap Used 26.64 %
Disk vzfs (/) 3 %
How does this relate to "Today's CPU Usage", if at all? What is "Disk vzfs"? If I'm using 0% memory (from the first screen), then how am I using 61.6% memory (in the second screen)? What does "0.80 (2 cpus)" mean? What is being measured?


Meanwhile, in Virtuozzo, I found the following in the "Resources" screen:
Resource Capacity
CPU 28.0%
Load Average 0.22, 0.39, 0.37

Resource Capacity
System 19.14%
How are these CPU "averages" being found? What do they mean? What is meant by "system"?


Also, I know I'm supposed to check my "QoS" listing in Virtuozzo frequently, and that this listing is related to something-or-other failing or stopping or some such, but what exactly is "QoS"?

Thank you for your patience while I learn. :blush:

Eliz.

stapel
02-20-2006, 03:39 PM
Well, I don't feel so bad, if nobody else knows what to make of this, either. :look:

Eliz.

nickn
02-20-2006, 04:33 PM
All the above looks okay :)

Basically, the first report will show you what processes have used the most CPU over the day, it's httpd, which is pretty standard on a web server. The second report shows you current usage, again, pretty standard, the load on the server is very good, CPU usage at 60% is great.

Third is basically giving you the overall system status of the VPS from outside of the VPS.

stapel
02-21-2006, 12:36 PM
...the load on the server is very good, CPU usage at 60% is great.
Thank you for the reassurances, but I'm afraid I'm not seeing where you're getting that the CPU usage is at sixty percent...? What am I misreading?

Thank you.

Eliz.

nickn
02-21-2006, 01:00 PM
Thank you for the reassurances, but I'm afraid I'm not seeing where you're getting that the CPU usage is at sixty percent...? What am I misreading?

Thank you.

Eliz.

Sorry Eliz, that shouldn't been Memory usage at 60%. Keep in mind *nix in general will use as much memory as possible, then release memory as needed to other applications...

stapel
02-21-2006, 01:21 PM
So you would second the recommendations regarding caching and KeepAliveTimeout that were suggested elsewhere (http://www.webhostingtalk.com/showthread.php?t=485733)?

If you're serving static files then a lightweight httpd such as lighttpd together with enforced long caching times for some files (hours or days) will dramatically reduce your overheads.
you can probably tweak a few things in your httpd.conf - especially your KeepAliveTimeout which I would set to about 3-5 for your site.
I would also strongly suggest loading the expires module and setting your static files to cache client side for a longer amount of time

Thank you so much for your time and advice.

Eliz.