Tag Info

New answers tagged

0

Why is "Processor load is too high" false alarm in your case? It's real symptom for me - CPU is saturated. IMHO: use only {Template OS Linux:system.cpu.load[percpu,avg1].avg(5m)}>5 but threshold depends on your server - what and how is it doing. But >5 value is suspicious for me. Example: CPU usage can be low, but CPU load high - in this case it can ...


1

Removing unused modules sometimes has the opposite effect as the server is then not able to cache effectively for example, but assuming this is not the problem, the other issue I think might be happening is that you may be low on memory and therefore the so called "disk thrashing" (high IO) occurs, this is very possible specially on a virtual host. A ...


0

There is a very simple way to this, at least in IIS8, don't know if this existed in IIS6. Anyway I think it's helpful. You go to IIS Select your server on the left click Icon Worker Processes see CPU / Memory per application


0

Your network utilization increased at the same time, which indicates you are receiving more requests on this server, or more demanding ones with larger responses. If you haven't changed your configuration, this doesn't necessarily indicate something is wrong. You are probably just getting more traffic.


0

InnoDB and FusionIO are very CPU-aggressive individually, but even more so together. I have old posts about this Aug 25, 2013 : MySQL / Fusion IO Configuration Question Jun 19, 2013 : MySQL using too much CPU The key here is to be a little more liberal in tuning InnoDB. SUGGESTIONS You need to choose one or more of the following suggestions: Decide ...


2

So even with all the tweaks and a upgrade to the latest 2.6 kernel that CentOS provides we were still seeing the hangs. Not as much as before but still seeing them. The fix was to upgrade to the 3.10.x series kernel that CentOS provides in their centosplus repo here http://mirror.centos.org/centos/6/xen4/x86_64/Packages/ This has done away with all ...


2

You can run ps -o lstart PID Which will give the start time of the process.


0

If you know PID of script; you can get the start time of script with stat -c %z /proc/PID Additionally you can analyze what's going on in script with strace e.g. strace -p PID -s 128 -tT This will give you idea where time is spent in this process which appears to be trashing your CPU


0

I suggest wrapping the php script inside a shell script: date >/your/log ; /usr/bin/time /path/to/your.php


2

The problem is clear not a disk related problem. And this is clear from the hanged strace: open("/proc/18679/cmdline", O_RDONLY) = 5 read(5, /proc is an interface between kernel and userspace. It does not touch the disk at all. If something is hanged reading the arguments of a command it is usually a kernel related problem, and unlikely a storage one. ...


7

In general, I've seen this happen because of a stalled-read. This is confirmed by your strace output. The attempt to read /proc/xxxx/cmdline file hangs while you're running ps aux command. The momentary spikes in I/O are starving the system's resources. A load of 90-160 is extremely bad news if it's storage subsystem-related. For the storage array, can you ...



Top 50 recent answers are included