Temperature Above Threshold, Cpu Clock Throttled
Jun 21, 2007
Is this behavior normal when running a utility such as bonnie++?
I'm running bonnie++ to check for the performance of my drive. When it gets to the part of Writing with putc()... the syslog starts to pop the message in the screen saying:
Message from syslogd@machine at Wed Jun 20 18:06:41 2007 ...
machine kernel: CPU0: Temperature/speed normal
I'm using the following OS:
OS CentOS 5
This is the uname information:
Linux machine.domain.com 2.6.18-8.el5 #1 SMP Thu Mar 15 19:46:53 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
This is the output of bonnie++
[root@machine ~]# bonnie++ -x 3 -u 0 -n1
Using uid:0, gid:0.
name,file_size,putc,putc_cpu,put_block,put_block_cpu,rewrite,rewrite_cpu,getc,getc_cpu,get_block,get_block_cpu,seeks,seeks_cpu,num_files,seq_create,se q_create_cpu,seq_stat,seq_stat_cpu,seq_del,seq_del_cpu,ran_create,ran_create_cpu,ran_stat,ran_stat_cpu,ran_del,ran_del_cpu
Writing with putc()...done
Writing intelligently...done
Rewriting...done
Reading with getc()...done
Reading intelligently...done
start 'em...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
bigblue.diversityjobs.com,8G,63756,90,96753,25,43654,9,66384,94,104946,10,292.7,0,1,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++
Writing with putc()...
Message from syslogd@bigblue at Wed Jun 20 18:06:41 2007 ...
bigblue kernel: CPU0: Temperature/speed normal
done
Message from syslogd@machine at Wed Jun 20 18:06:43 2007 ...
bigblue kernel: CPU1: Temperature above threshold, cpu clock throttled
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Oct 1, 2008
Is there a command I can issue using Putty, and logged in as root or admin, to see what temperature my server cpu is running at.
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Sep 22, 2008
if there is a command to check the CPU temperature. Is the following the right way?
cat /proc/acpi/thermal_zone/THRM/temperature always gives 30 C.
I recently got a Intel Quad Core with 8 GB RAM. When the load is nearing 1.00, the kernel flashes the message below. It is always CPU1 and CPU2 while CPU3 and CPU0 is reported to be normal.
====================================================
Sep 22 00:07:47 server2 kernel: CPU2: Temperature above threshold, cpu clock throttled
Sep 22 00:07:47 server2 kernel: CPU3: Temperature/speed normal
Sep 22 00:07:49 server2 kernel: CPU1: Temperature above threshold, cpu clock throttled
Sep 22 00:07:49 server2 kernel: CPU0: Temperature/speed normal
=====================================================
and /proc/acpi/thermal_zone/THRM/* always gives the following
====================================
<setting not supported>
cooling mode: critical
<polling disabled>
state: ok
temperature: 30 C
critical (S5): 110 C
====================================
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Jun 26, 2007
I have been loosely monitoring the system temperature on my co-located 1U server and have noticed fluctuations of up to 9 degrees Celsius (or around 18 degrees Fahrenheit) depending on the time of day, and the current weather in the city the data center is located.
In the dead of night the system usually reads around 28C but in mid afternoon it will get up to 34 - 38C, not terribly hot, but the effect of the constantly changing temps on the hard drives has me concerned. Server load doesn't seem to be a huge contributor to the temp increase since it's peak load times are usually from late evening until early morning, so I'm guessing this is the data center heating up and cooling down following the outside weather patterns.
do any of you others see temperature swings like this on your servers and how much would be normal?
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Jul 30, 2008
how to read CPU Temperature on CentOS 4.6. and kernel 2.6.9 (CentOS kernel from yum)
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Apr 20, 2008
what are the 'standards' for server temperatures.
We are testing some new DELL servers, and we're hitting 65 - 70degrees Celcius, was wondering if anyone experiences these temperatures.
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Jul 26, 2007
We have a very small server/network/telecommunications room with one server rack housing 2 racked Dell servers, 2 3com router, 1 switch, 2 UPSes and 2 tower servers.
In addition, our phone system is housed in this room.
The temperature is normally about 77 degrees Fahrenheit. It is a VERY small room and central air does not reach the room. Their is only a portable A/C(I guess its fairly powerful) that we leave on all night and day at its max. However, the temperature stays about a constant 77 degrees.
I read in some articles that the temp should be about 58 degrees Fahrenheit. Is that true?
Is our equipment being damaged by the temperature in the room?
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Sep 16, 2007
I select a vps of Smokyhosts last friday, but I found the clock of it an hour off the correct time,
eg. I set the timezone to UTC, the correct NTP time is 3:00, but the clock of vps is display 2:00, It's an hour before the correct time.
I think this is an error when they first set the clock of host node, I send several tickets to Smokeyhosts support, but they told me I can set to another timezone not in my country, I think this is not reasonable.
and they told me they do not allow any time change requests for the hardware node even if it's error.
Since the clock of VPS is an hour error, even if I can set another timezone not my country. but if I have a forum on this VPS, and user can set their own timezone settings, they would be puzzled to find what they seclectd timezone is always an hour off,
I must be explain this to them? I think this is not acceptable.
I understand the NTP would be impossible to all VPS, but they should ensure the host node's clock is correct relatively, now it's an hour off, I think they can correct this easily if they would like to do.
another small question is when I get the vps, Mysql was installed, but the user "mysql" is not exist in system, So mysql service can't start, I add this myself, and it's ok.
Now all other things looks well except the clock.
their support always response quickly, i'm very satisfied with them.
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Jun 19, 2009
I have an VPS at cheapvps.co.uk since November 2007. It has worked like a charm until a week ago. Since the massive crack from last week and the subsequent shutdown & boot, the clock on my VPS is going crazy.
Clock is really accelerated, a minute in the real world equals to more than 2 minutes within the VPS. I'm having lots of problems with dates in the future, and cheapvps support team is working to get this solved with no success.
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May 12, 2009
One of our server's system clock seems to gradually creep away from the correct time. It has been causing us a lot of issues. After one day it becomes more than one hour off. After each minute it becomes a few seconds off.
Any ideas what could be causing this? It's uptime is ~2 months so it doesn't happen when it goes offline, it happens while it is running.
Right now we have a cronjob running ntpdate every few minutes as even with the ntpd service running it would end up off by several minutes when we would check. I have a feeling this isn't a very reliable fix though.
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Feb 17, 2007
Mountain View (CA) - As a company with one of the world's largest IT infrastructures, Google has an opportunity to do more than just search the Internet. From time to time, the company publishes the results of internal research. The most recent project one is sure to spark interest in exploring how and under what circumstances hard drives work - or not.
There is a rule of thumb for replacing hard drives, which taught customers to move data from one drive to another at least every five years. But especially the mechanical nature of hard drives makes these mass storage devices prone to error and some drives may fail and die long before that five-year-mark is reached. Traditionally, extreme environmental conditions are cited as the main reasons for hard drive failure, extreme temperatures and excessive activity being the most prominent ones.
A Google study presented at the currently held Conference on File and Storage Technologies questions these traditional failure explanations and concludes that there are many more factors impacting the life expectancy of a hard drive and that failure predictions are much more complex than previously thought. What makes this study interesting is the fact that Google's server infrastructure is estimated to exceed a number of 450,000 fairly mainstream systems that, in a large number, use consumer-grade devices with capacities ranging from 80 to 400 GB in capacity. According to the company, the project covered "more than 100,000" drives that were put into production in or after 2001. The drives ran at a platter rotation speed of 5400 and 7200 rpm, came from "many of the largest disk drive manufacturers and from at least nine different models."
Google said that it is collecting "vital information" about all of its systems every few minutes and stores the data for further analysis. For example, this information includes environmental factors (such as temperatures), activity levels and SMART parameters (Self-Monitoring Analysis and Reporting Technology) that are commonly considered to be good indicators to describe the health of disk drives.
In general, Google's hard drive population saw a failure rate that was increasing with the age of the drive. Within the group of hard drives up to one year old, 1.7% of the devices had to be replaced due to failure. The rate jumps to 8% in year 2 and 8.6% in year 3. The failure rate levels out thereafter, but Google believes that the reliability of drives older than 4 years is influenced more by "the particular models in that vintage than by disk drive aging effects."
Breaking out different levels of utilization, the Google study shows an interesting result. Only drives with an age of six months or younger show a decidedly higher probability of failure when put into a high activity environment. Once the drive survives its first months, the probability of failure due to high usage decreases in year 1, 2, 3 and 4 - and increases significantly in year 5. Google's temperature research found an equally surprising result: "Failures do not increase when the average temperature increases. In fact, there is a clear trend showing that lower temperatures are associated with higher failure rates. Only at very high temperatures is there a slight reversal of this trend," the authors of the study found.
In contrast the company discovered that certain SMART parameters apparently do have an effect drive failures. For example, drives typically scan the disk surface in the background and report errors as they discover them. Significant scan errors can hint to surface errors and Google reports that fewer than 2% of its drives show scan errors. However, drives with scan errors turned out to be ten times more likely to fail than drives without scan errors. About 70% of Google's drives with scan errors survived the first eight months after the first scan error was reported.
Similarly, reallocation counts, a number that results from the remapping of faulty sectors to a new physical sector, can have a dramatic impact on a hard drive's life: Google said that drives with one or more reallocations fail more often than those with none. The observed average impact on the average fail rate came in at a factor of 3-6, while about 85% of the drives survive past eight months after the first reallocation.
Google discovered similar effects on hard drives in other SMART categories, but them bottom line revealed that 56% of all failed drives had no count in either one of these categories - which means that more than half of all failed drives were put out of operation by factors other than scan errors, reallocation count, offline reallocation and probational counts.
In the end, Google's research does not solve the problem of predicting when hard drives are likely to fail. However, it shows that temperature and high usage alone are not responsible for failures by default. Also, the researcher pointed towards a trend they call "infant mortality phase" - a time frame early in a hard drive's life that shows increased probabilities of failure under certain circumstances. The report lacks a clear cut conclusion, but the authors indicate that there is no promising approach at this time than can predict failures of hard drives: "Powerful predictive models need to make use of signals beyond those provided by SMART."
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Nov 19, 2008
There is serious clock skew all across the 4 CTs I have put in an OpenVZ HN which runs Debian GNU/Linux, the kernel Linux is v2.6.26, waldi tree. The HN shows correct time, the CMOS RTC is bang correct.
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Mar 27, 2009
Let me try this question in here as I think there are many companies in here who have remote employees.
Can anyone recommend an online punch clock system to keep track of employee time in's and out's? We would need something that is easy to do payroll and it has to be online so remote users can easily access it.
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Mar 27, 2007
I am running windows 2003, and I patched it with the timezone windows update, everything was fine, but when I looked today, the clock is one hour slow.
But when I run my php scripts, it shows the time being correct. I thought php grabbed the time from the system? Perhaps this is just a bug with the clock, and the internal system time is correct? It is the only thing I can think of.
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Jan 8, 2009
which type of CPU would be better for a web server that will run Windows, PHP, ColdFusion, mail, DNS, and IIS. Would a dual core CPU with a higher clock speed do better than a quad core CPU with lower clock speed? For instance, would a dual core 3 Ghz processor do better than a quad core at 2.4Ghz?
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Jun 2, 2007
I'm trying to upgrade from php 5.2.0 to 5.2.2 but for some reason I receive the following errors:
/scripts/easyapache
Quote:
make [@php-5.2.2]...(-j 2 clean)....Done
make [@php-5.2.2]...(-j 2).................................
Message from syslogd@matrix at Sat Jun 2 15:06:17 2007 ...
matrix kernel: CPU0: Temperature above threshold
Message from syslogd@matrix at Sat Jun 2 15:06:17 2007 ...
matrix kernel: CPU1: Temperature above threshold
Message from syslogd@matrix at Sat Jun 2 15:06:17 2007 ...
matrix kernel: CPU1: Running in modulated clock mode
Message from syslogd@matrix at Sat Jun 2 15:06:17 2007 ...
matrix kernel: CPU0: Running in modulated clock mode
..............
Message from syslogd@matrix at Sat Jun 2 15:06:31 2007 ...
matrix kernel: CPU0: Temperature above threshold
Message from syslogd@matrix at Sat Jun 2 15:06:31 2007 ...
matrix kernel: CPU1: Temperature above threshold
Message from syslogd@matrix at Sat Jun 2 15:06:31 2007 ...
matrix kernel: CPU1: Running in modulated clock mode
Message from syslogd@matrix at Sat Jun 2 15:06:31 2007 ...
Running cPanel/WHM, Centos.
I've never had the above before,
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Apr 17, 2007
I have worked with VMWare quite a bit, and have found that no matter what tweaking you do a clock skew of up to a minute (relative to the host clock, itself kept accurate enough via NTP) is unavoidable at times, at least for a Linux 2.6.x based guest.
Do any of the common technologies allow guests to be kept more closely in sync with the host clock and so be more accurate (assuming the host's clock isn't wide of the mark, of course)? Do some of the technologies work OK with using NTPd to regulate the guest clock (under VMWare this is bad idea as it "conflicts" with VMWares own clock synchronisation method potentially making things worse than they otherwise would be).
The reason for the question is that I'm playing with some code that will run on a few different locations and while I can use an external source to fake a clock to the accuracy I want (+/- a second or two) most of the time, I wouldn't have to if I could rely on the VM's wall-clock being that accurate. If the project goes anywhere (my toy projects usually don't!) it would use real machines, but at this stage I'd rather avoid that expense/hassle.
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Oct 14, 2014
Can not change in 24 hour Clock mode Plesk 12?The scheduled backups start false, because in Plesk 12 running 12 hours mode.The language in Plesk is German.
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Jan 3, 2009
just out of interest, does anyone know a ssh command(s) to bring up your servers hardware stats? Cpu type and clock speed, memory, disks etc.
I've looked everywhere for a shell command to show cpu type with no luck.
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