After php encryption is put into the server apache occupies a high cpu. after php encryption is put into the server apache occupies a high cpu, it is easy to reach 100% local encryption program test no problem, mainly Internet, once encrypted, the cpu usage is high after apache is restarted, and no website is accessed.
, generally recommended xcache.size depending on how much php file, Xcache.count and CPU core number is the same:[Xcache.admin]Xcache.admin.enable_auth = OffXcache.admin.user = "XCache"Xcache.admin.pass = ""[XCache]Xcache.shm_scheme = "Mmap"xcache.size=1024mXcache.count =16Xcache.slots =8kXcache.ttl=0Xcache.gc_interval =0xcache.var_size=16mXcache.var_count =1Xcache.var_slots =8kXcache.var_ttl=0Xcache.var_maxttl=0Xcache.var_gc_interval =300Xcache.test
In performance tests, top commands are often used to monitor the CPU and memory usage of a process over a period of time. Output to the file once every 10 seconds. The following code processes the output top file and obtains the CPU utilization. memory has the largest, minimum, and average value. Topfile = raw_input ("please input the topfile path :")
Try:
Top =
Check tomcat memory usage by the program and view tomcat memory usageRecently, the company's online tomcat often has no chance of downtime, and summarizes the problem locating methods for reference only:Error message:
Maximum number of threads (200) created for connector with address null and port 9443# There is insufficient memory for the Java Runtime Environment to continue.# Cannot create GC thread. Out
If you use the task manager in Windows to view the status of each process, you can see that the total CPU usage of the system is the sum of processes.
However, this is not the case when top or other tools are used in Linux. There are often processes with a very high CPU usage up to 90%, but the system's
Background:An alarm is reported when the CPU usage is higher than the standardTroubleshooting:1. No queries with extremely high CPU performance were found during tracking2. Check the CPU usage of the kernel to see if it is caused
.[sql_handle]) As Dest 7 WHERE [session_id]>50 8 ORDER by [Cpu_time] DESCSimulate some of the CPU time-consuming actionsThere are also the number of CPU and user scheduler and the maximum number of worker threads, to check whether the worker is exhausted or to troubleshoot CPU usage1--View
Parallel recovery of large oracle transactions leads to database performance degradation-high cpu usage-processing ideas parallel recovery of large oracle transactions leads to database performance degradation-high cpu usage processing ideas large transaction rollback large-scale transaction rollback has a very high co
maximum CPU usage of each thread. (How to set it? Can I only set a fixed percentage or can I set a dynamic value based on the CPU usage of the current server ?)
(2) serialize the functions A and B, that is, create a queue. If a user wants to execute one of the functions a and B,
function in a certain period of time. Press F12 on the keyboard to open the developer tool and switch to the profiles page, as shown below:
650) This. width = 650; "src =" http://s3.51cto.com/wyfs02/M01/33/EC/wKioL1Oql23y_iYOAAIWz5WQIOg374.jpg "Title =" q1.jpg "alt =" wkiol1oql23y_iyoaaiwz5wqiog374.jpg "/>
Select the collect JavaScript CPU profile option and click the start button to start recording. Then, use the same operation test password input
Linux ps command to view the cpu and memory usage sorting (conversion), linuxps
Run the following command to View Details:
ps -aux | sort -k4,4nps auxw --sort=rssps auxw --sort=%cpu
Ps commands in linux
% CPU usage of the cpu pr
Nodejs mkdirP module causes high CPU usage, nodejsmkdirpNodejs mkdirP module causes high CPU usage
When I recently deployed the node. js project on the server and started it, I found that the cpu usage of the node process was arou
. It mainly depends on thread blocking.Main Code:
ThreadMXBean tm = ManagementFactory.getThreadMXBean();tm.setThreadContentionMonitoringEnabled(true);long [] tid = tm.getAllThreadIds();ThreadInfo [] tia = tm.getThreadInfo(tid, Integer.MAX_VALUE);long [][] threadArray = new long[tia.length][2];for (int i = 0; i long threadId = tia[i].getThreadId();long cpuTime = tm.getThreadCpuTime(tia[i].getThreadId())/(1000*1000*1000);threadArray[i][0] = threadId;threadArray[i][1] = cpuTime;}
The following thre
FAM and gamin to monitor changes to the file/directory of the file system and then notify mono when it is running, in this way, the efficiency is greatly reduced, and the performance is very bad. If mono cannot detect inotify, fam, and gamin, Mono uses the last option to manage watcher, which is implemented in managed code, A separate thread is used for monitoring and polling changes to the file system in the selected file/directory. Because the application may (and sometimes not in ASP. NET) r
1. Create a folder named monitor in the webapps folder.
2 monitor to create a WEB-INF and SRC
3 New web. xml and classes in the WEB-INF
4. Web. XML content
5. The servlet accepted by write processing is shown below. As follows:
Import Java. io. ioexception;
If it is a request sent by curl, the value of the CPU usage is obtained and written to the cpu.txt file. If the user accesses this servlet through
Nodejs mkdirP module causes high CPU usageNodejs mkdirP module causes high CPU usage
When I recently deployed the node. js project on the server and started it, I found that the cpu usage of the node process was around 40%. At that time, I was very puzzled, the newly started
Parallel recovery of large oracle transactions leads to database performance degradation-high cpu usage
The rollback of a large transaction has a very high cost, not only locking the required resources
And the CPU and IO consumption, especially IO, will be extremely intensive. At this time, we hope to reduce the number of rollback results.
. It is impossible to s
Analysis on High CPU usage of HBase Thrift2High-level analysis of HBase Thrift2 CPU usageDirectory
Directory 1
1. symptom 1
2. Problem locating 2
3. Solution 5
4. Related Code 5
1. symptom description
Port 9090 of the external connection times out, but the telnet port always succeeds. Using the top Command, we found that the
Now I'll do two things when I create the image:1. In the build each image, add the specific version number;2. Write the startup script for all applications.It is common for an application to create a child process. In the vast majority of systems, you can create a child process, read its output, check the return value on exit, and so on, and then leave it to the INIT process for resource recycling after the program finishes.But for
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