25 votes
Accepted
Do CPU credits exist for c5d.large instances? And if not, why not?
CPU credits only apply to T2/T3 instances. Each T2/T3 instance accumulates some CPU credits per second and also when it's in use (i.e. not "idle") it spends these CPU credits. When it runs out of ...
- 26.3k
9 votes
Accepted
PHP-FPM using 100% CPU on a server that has 16 threads
I would use php-fpm settings with pm = static. From my experience high traffic websites work better with pm static rather than dynamic/ondemand. You can get an ideea about the memory used by a php-fpm ...
- 443
9 votes
Load average greater than number of CPUs
Linux load average is a number equal to the number of the running processes plus a number of processes ready to run and waiting for available CPU plus the number of processes in uninterruptible state (...
- 11.6k
9 votes
Windows File server heavy cpu usage - Render Farm with many clients reading data at once
A few things to note, that 40Gbps NIC is only connected to one socket/NUMA-node - so if it's associated with the second socket then any file-sharing workload handled by the first socket will have to ...
- 102k
7 votes
CPU load for high performance computing
Load average shows the queue of threads ready to run. In Linux, this includes also threads waiting for disk. It could happen that a broken NFS server could increase the load average to insane numbers. ...
- 19.1k
7 votes
Accepted
ZFS: arc_prune is using 100% CPU with high load average
Something is forcing ZFS to reclaim memory by shrinking ARC. To immediately solve this problem, you can try issuing echo 1 > /proc/sys/vm/drop_caches to drop Linux pagecache only, or echo 3 > /...
- 52.5k
6 votes
How to check gpu usages on aws ec2 gpu instance?
Use: nvidia-smi -h to see the options. Display info arguments: Display only selected information: MEMORY, UTILIZATION, ECC, TEMPERATURE, POWER, CLOCK, ...
- 61
6 votes
Root user consume huge amount of CPU
If your company has a breach response process, I would invoke that now. Otherwise: This looks potentially malicious, I would recommend looking at it closer in /proc. With a root privilege shell, ...
- 1,118
6 votes
Accepted
How can I monitor CPU usage and processes on Windows Server 2012 as a service over a 24 hour period?
Using Daniel K's suggestion of performance monitor, I found out how to do this. Load up Performance Monitor Go to 'Data Collector Sets' Expand 'User Defined' Make a new 'Data Set' Select Create ...
- 358
6 votes
AWS server completely shutting down because of the insufficient CPU memory (server-kernel: out-of-memory )
What may be causing the problems with the CPU usage Bad configuration. First you need to reduce the memory overcommit (the default heuristic is way too optimistic on server hosts). There is lots of ...
- 23.9k
5 votes
How is RAM and CPU allocated if no manual changes are applied to an Ubuntu Server
If you need to limit memory usage on the same server, your best bet will be to either Use two Virtual Machines, ideally KVM so that you can use the existing Ubuntu server to host the VMs. However, ...
- 1,392
5 votes
Accepted
How is RAM and CPU allocated if no manual changes are applied to an Ubuntu Server
RAM is first-come-first-serve. If userA runs 9 processes that allocate 10% of memory each, and then userB logs on, userB will see only 10% of memory left. In the event that memory is exhausted, ...
- 390
5 votes
High CPU Load on Synology by smbd
I had also the same problem with : random slow load problem when I navigate into folder with Windows Explorer hight CPU usage by the smbd process (~50%) when the random problem that talk about ...
5 votes
Accepted
50% Load on 2 CPU is the same that 100% Load on One CPU?
It's not quite that simple. With one thread or process that burns as much CPU as possible, it will max out at 50% CPU on a dual CPU system. Or, some systems will show it as 100% CPU, because the ...
- 8,584
5 votes
How can I monitor CPU usage and processes on Windows Server 2012 as a service over a 24 hour period?
Windows Server has a built-in tool to show performance data in real time or to collect data in logs for later review. I think that this will do exactly what you are looking for. See this article for ...
- 697
5 votes
Can I have multiple threads running in parallel in a pod with a CPU limit set to 500 millicores?
You certainly can run 2 threads in a container at once using 25% of the cputime each. However, as for whether these will be run exactly together, I'm not 100% sure. Running the following tests do seem ...
- 307
5 votes
Running a cluster 24x7 at full load. Possible damages?
how long will it be able to sustain without any physical damage? If you buy decent production-quality servers then no, you shouldn't see any damage. In fact there's an argument that you'd see less ...
- 102k
4 votes
Why do user and system cpu in cpuacct.stat not add up to cpuacct.usage?
I'm not a kernel developer, but, digging through the kernel source code, cpuacct.usage (updated via cgroup_account_cputime) and cpuacct.stat (updated via cgroup_account_cputime_field seem to be ...
- 41
4 votes
Accepted
Does AWS charge for CPU Usage?
AWS gives you control over this. Typically the T instance have a hard limit on the CPU allowed, with no additional costs. The new T2 / T3 unlimited capability lets you use more CPU and get charged for ...
- 33.9k
4 votes
What is the relation between IO wait utilisation and load average
(Assuming Linux, although the general concept can be applied to other operating systems.) A workload cannot be described only by the load average and %iowait. Those are metrics that only summarize ...
- 36.5k
4 votes
Accepted
One process takes all server resources (iowait?)
It is not a process, it is the time things are waiting for IO. I would say you possibly have a hard disc there that is totally overloaded at those times. Like ridiculously overloaded - possibly by: ...
- 52.1k
4 votes
Accepted
Can I have multiple threads running in parallel in a pod with a CPU limit set to 500 millicores?
Yes, CPU limits in Kubernetes are implemented using the Linux CPU quota subsystem (at least on Linux, not sure on Windows). That system works by giving the cgroup a total count of timeslices it is ...
- 878
4 votes
Is 'Max Cpu' at 100% normal?
It's aggregation rule, not the actual usage. When metrics are collected, they have (for CPU) a single metric: current CPU load. If metrics are collected 6 times a minute, there are 6 values. When ...
- 326
4 votes
100% CPU load caused by service "perfctl"
The fact that the user is www is a bit suspect. Are you running AppArmor? Are you running a web service that is exposed to the public? This looks to me like your server is compromised, and someone has ...
- 3,620
4 votes
100% CPU load caused by service "perfctl"
I have encountered the same malware. You can try to check the all cronjob task whether is suspicious or not. check the cron job list with all user for user in $(cut -f1 -d: /etc/passwd); do echo $...
- 141
4 votes
Windows File server heavy cpu usage - Render Farm with many clients reading data at once
The system process being that busy means the OS is having do deal with heavy overhead, either from its internal workings or from device drivers. Some likely culprits: NIC firmware/drivers (are they ...
- 73.1k
3 votes
How to throttle Chrome's CPU usage?
There's no native way to throttle CPU usage, but you can set process affinity to only one core. One way to do this via Group Policy is to deploy a scheduled task. If you only have one server, you can ...
- 53.3k
3 votes
Need help trouble shooting high CPU usage by PHP-fpm
In my case, after running top, pid (3174) of top consuming CPU (user time was 11.8%us) was identified: top - 12:43:19 up 1:35, 2 users, load average: 0.97, 1.05, 1.11 Tasks: 265 total, 2 running, ...
- 31
3 votes
How is RAM and CPU allocated if no manual changes are applied to an Ubuntu Server
By default, users are unlimited memory-wise in Ubuntu, and in this case it's "first come, first serve". In other words, User A could use up all the memory and leave nothing for a second user. Note ...
- 101k
3 votes
Optimal configuration of "Processor load is too high" trigger in Zabbix
I would suggest something like this: {Template OS Linux:system.cpu.load[percpu,avg15].avg(15m)}>1.8 The purpose being that you want a slower response time on your alarms rather than raising to a ...
- 31
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