Many users are now plagued by slow database problems and are struggling to pay for a professional DBA that is too expensive. Software maintenance personnel on the database is not so deep understanding, so that the problem can not be resolved, or can
Http://www.cnblogs.com/bangerlee/archive/2012/08/30/2659435.html
Introduction
The CPU occupies a high amount of unnecessary. Application response is slow. Suffers from the lack of analytical tools.
Oprofile leverages CPU hardware level performance
Tomcat abnormal stop, process is killedThe corresponding Tomcat logs are as follows:/application/tomcat-service-8080/bin/catalina.sh:line 386:4370 killed "/usr/local/jdk/bin/java" "-
1.1 Viewing CPU consumption valuesTypically, this type of failure occurs when the user has a long response time, the WebLogic server is running abnormally slow, the request or operation times out, and so on. After receiving the fault notification,
Solve the Problem of CPU resource depletion caused by a large number of latch free databases in production. latchfree
At noon, the cpu of a database we produced remained high.
Using the following SQL statement, we can view the database waiting and
I. Common usage
Several common usage methods of redis include:
Redis single copy;
Redis multi-copy (Master/Slave );
Redis sentinel (Sentinel );
Redis cluster;
Self-developed redis.
Ii. Advantages and disadvantages of various usage methods
1.
I have already learned some basic Bios knowledge and settings in the previous article. In this article, I will introduce Bios overclocking settings in more detail, it is expected to be helpful for players who want to overclock but do not miss the
Server monitoring?? In addition to deploying WebApp, you need to monitor the service's exception information and server performance metrics when building the server, and notify the administrator of any exceptions.?? The server was built using
When a Linux system encounters a problem, we not only need to view the system log information, but also need to use a large number of performance monitoring tools to determine which part (memory, CPU, hard disk ......) An error occurred. In Linux,
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