11
votes
4answers
3k views

Why is 1 of my 24 CPUs Pegged at 100%?

I have an HP ProLiant DL380 G7 system using 2 6-core CPUs, with Hyper-threading enabled, for a total of 24 logical CPUs (as seen by Windows). When running our application, total system CPU ...
2
votes
1answer
421 views

Should CPU usage be so low while memory usage is high on heavy mysql server?

I'm using ubuntu server 12.04 x64. The server receives a lot of requests to mysql through apache web server (it's light interface). From mysql stats I see there is approx 250 queries / second from 8 ...
1
vote
2answers
1k views

httpd high cpu usage slowing down server response [duplicate]

my client has a image sharing website with about 100.000 visitor per day it has been slowed down considerably since this morning when i checked processes i've notice high cpu usage from http .... ...
0
votes
2answers
77 views

When upgrading hardware to increase program performance, which should I consider first CPU, RAM or both? [duplicate]

I have a simple script that I wrote in PHP (which, after reading lots of QAs seems to have less than desirable memory management). It's an extremely small script that loops through configuration ...
-1
votes
1answer
657 views

High CPU Usage in windows server 2003

In one of our production servers the CPU usage is 100% and thus some of the backup jobs failed. In windows server 2003 cms.exe shows : 50%, tomcat_3.exe : 25%, and tomcat_1.exe : 25%. Please help me ...
6
votes
1answer
765 views

Very uneven CPU utilization with SQL Server 2012 on 2 processor computer with 16 cores / processor

After installing SQL Server Enterprise 2012 with the Server + Cal license model, on a computer with 2 processors each with 16 cores (and no hyperthreading involved) and putting the server under ...
3
votes
1answer
2k views

Disabling CPU management

If I add the following processor.max_cstate=0 to the kernel command line for boot up, does that disable all CPU power management and throttling? I also found: ...
0
votes
2answers
3k views

How much resources should backup tools be using? ( issues with clBackup )

My hosting provider makes backups of our servers using a tool called clBackup which pushes files over the network. Below is one ps output we took and reported to our provider: top - 10:06:24 up 25 ...
3
votes
1answer
372 views

Truecrypt - disk stops reading/writing with regular intervals (Ubuntu)

I am running Ubuntu Lucid with a raid0 setup Intel Xeon X3440 - 4x (2x 2.9GHz) 16GB RAM I got a 1.9TB truecrypt7.0 file container with AES located in my /home (where raid is). When testing ...
1
vote
1answer
764 views

CPU is very spikey and erratic, network latency. Windows Server 2003

Something is making my server go crazy. First it was just the network had some bad latency, then I noticed it was on the server, not the network. I thought it to be HDD related but I am not sure. It ...
2
votes
5answers
403 views

Does Overclocking Anything Shorten It's Life? [closed]

From a business standpoint... If intel could take a 3.0 GHz CPU, and overclock it to 4.0 GHz - whilst still covering their warranty they would do so. It's absolutely free and makes the chip perceived ...
0
votes
2answers
382 views

Linux: CPU usage artificially capped somehow?

This is the CPU usage graph of a server: It seems that the CPU usage reached a hard limit at 24. This is a 32-core server so it should be able to go beyond 24 with ease. But that's not the case. ...
0
votes
4answers
957 views

MySQL server CPU usage shot up for no apparent reason. Any idea why?

I have a server dedicated to MySQL. In the middle of the night its CPU usage just shot up for no apparent reason. Here're the graphs: As you can see CPU usage just shot up at Fri 3:30am. Most of ...
1
vote
1answer
768 views

Does Windows performance degrade past a certain level of CPU utilization?

Is there a recommended average CPU threshold in running Windows boxes based on experience in other shops? Background: We are running with Windows Server 2003 32-bit OS. Servers are handling a major ...
1
vote
3answers
1k views

Can a SQL Server have a CPU bottleneck when Processor Time is under 30%

Is it in principle possible for the CPU to be the bottleneck on a SQL Server if the Performance Counter Processor:Processor Time is constantly under 30% on all cores? Or does low Processor Time ...
2
votes
2answers
100 views

Guaranteeing Shell Responsiveness on Pegged System

So my system is getting DOS'd, or I've just opened a kind-of-huge file (openstreetmaps planet.osm). The system goes totally unresponsive... so unresponsive that it'll take about 10 minutes to get into ...
2
votes
2answers
1k views

Http gzip compression and performance

I've always tried to enable gzip compression on web servers because it seemed to have very low CPU cost and you obtain a significant data transfer reduction. Now I we have a public server that has ...