svchost using 100 cpu

Sometimes, the Linux server running Nginx, php-cgi (PHP-FPM) Web services, suddenly the system load up, use the top command to view, many php-cgi process CPU utilization is close to 100%. Later, I tracked the discovery that this kind of situation is closely related to PHP's file_get_contents () function. In large and medium-sized Web sites, API interface calls based on the HTTP protocol are commonplace. PH

way, when all php-cgi processes are stuck in the file_get_contents () function, the Nginx + PHP WebServer can no longer process new PHP requests, nginx returns "502 Bad Gateway" to the user ". Modify this parameter to set the maximum execution time of a PHP script. For example, if file_get_contents () is changed to 30 s, and the webpage content is slow to be obtained, this means that 150 php-cgi processes can only process 5 requests per second, webServer is also difficult to avoid "502 Bad Gate

Recently installed on the VirtualBox CentOS, suddenly found the CPU fan turned, a check, the original VirtualBox on the CentOS almost in 100% use VirtualBox assigned to its CPU core. On the internet to find a half-day, finally found a method, namely: Modify the/etc/grub.conf file, in the kernel row after adding the parameter "divider=10", after testing, sure enou

Phenomenon: power-on or login, usereventagent consumes CPU 100%, memory consumption per second crazy growth, reached over 20G was Force QuitReproducible: 100% ReproductionWorkaround: Repair Disk PermissionsThe following are the same cases, but are resolved by banning certain system startup itemshttps://discussions.apple.com/message/26003314#message26003314http://

CUDA program Run CPU 100% problem is a bit of a headache, in the experimental process called the kernel function, and then call Cudamemcpyasync, but now there will be a block in this so-called Async api,strace followed a bit, Found that 99.999% were allClock_gettime (Clock_monotonic_raw, {2461, 485666623}) = 0So there's an inspiration, why don't I write a similar poll function, but I'm polling every 1 minut

causes the php-cgi process CPU 100% is not the only one, then, how to determine the file_get_contents () function is caused? First, use the top command to see the php-cgi process with high CPU usage. Copy CodeThe code is as follows: Top-10:34:18 up 724 days, 21:01, 3 users, Load average:17.86, 11.16, 7.69 tasks:561 Total, running, 546 sleeping, 0 stopped, 0 zom

; Of course, this is not the only reason that led to the php-cgi process CPU 100%, so how do you determine if the file_get_contents () function caused it? First, use the top command to view the php-cgi process with a high CPU utilization rate. Copy Code code as follows: Top-10:34:18 up 724 days, 21:01, 3 users, Load average:17.86, 11.16, 7.69

This article mainly introduces the PHP random record MySQL rand () caused by the CPU 100% solution, has a certain reference value, now share to everyone, the need for friends can refer to MySQL database has 10 tens of thousands of data, using rand () to extract random 10 records, resulting in high server CPU consumpt

file_get_contents () function, the WebServer of this nginx+php is no longer able to process the new PHP request, and Nginx will return "502 bad Gateway" to the user. Modify this parameter to set a PHP script maximum execution time is necessary, but the symptom does not cure the root causes. For example, change to To achieve a thorough solution, PHP programmers can only get rid of the habit of directly using file_get_contents ("http://example.com/")

Release time: 2007-02-09 Poisoning symptoms: The boot CPU is 100%, check the process, the original is Cmd.exe occupy the vast majority of the CPU. The CPU utility rate returns to normal after the Cmd.exe is turned off. But again, the CPU is

I use Web API made a website, the site is very simple, the request is a few common parameters, submitted to the server, in the Web API to do a parameter verification, and then go to access Redis the time command in the YYYY-MM-DD and finally calculates the result of the time command's return hh:mm: the form of SS, returned in JSON format. Number of requests per second: 1500 times.CPU occupy 100%Both memory and IO are relatively low.cpu:e5800Memory: 4g

Situation: When we are using iisat this time, if the device is mistakenly shut down (power-off Wait), restart the machine, and then use iisat the same time, we often find that inetinfo.exe occupies 100% of the cpu and is useless after iis is reinstalled. The solution for this problem is to re Symptom: inetinfo accounts for 1