Redis Performance Tuning: Save the effect of SNAPSHOT on performance, redissnapshot
Some time ago, the Development Environment reported that access to the Redis server was very slow, and each request took several seconds. 2 ~ This will happen again in three days.
I checked the Linux performance and there is no problem.
ObjectiveIn the field of big data computing, Spark has become one of the increasingly popular and increasingly popular computing platforms. Spark's capabilities include offline batch processing in big data, SQL class processing, streaming/real-time computing, machine learning, graph computing, and many different types of computing operations, with a wide range of applications and prospects. In the mass reviews, many students have tried to use spark in various projects. Most students, including t
This article mainly describes how to locate the performance problems of the Site Based on some simple tools and Simple phenomena.
The topics in this chapter are as follows:
General performance tuning process
Analyze page loading information using analysis tools
Analyze performance bottlenecks using analysis tools
Front-end main performance optimization point accept-encoding:gzip for resource compressionGzip compression mode browser support situation:
Netscape 6+ (Netscape 4-5 does, but with some bugs).
Internet Explorer 5.5+ (July) and IE 4 if set to http/1.1.
Opera 5+ (June 2000)
Lynx 2.6+ (some time before 1999)
Firefox 0.9.5+ (October 2001)
Chrome since forever
Safari since forever (as far as I can tell)
Disadvantage: CPU re
Recently it has been a tangle of performance analysis and tuning how to start with hardware first, or from code or database first. From the operating system (CPU scheduling, memory management, process scheduling, disk I/O), Network, Protocol (HTTP, TCP/IP), or from application code, database tuning, middleware configuration and so on.Single middleware also sub-we
MYSQL Performance Tuning and architecture design-instance analysis of factors affecting MYSQL Performance
Requirement overview
A simple discussion zone system requires users, user groups, and group discussion areas.
Brief analysis
1) tables that need to store user data;
2) tables that need to store group information and user-group relationships;
3) tables that ne
below: The total number of instances created on the left, the structure of the instance on the right, and the reference description below, which can be seen in the class Cyclicdependencies and referenced by HashMap.This can determine the location of the leak, and then according to the actual situation to analyze and solve. JVISUALVM remotely monitor Tomcat 1 and modify the remote Tomcat's catalina.sh profile, where it adds:
java_opts="$JAVA _opts
-djava.rmi.server.hostname=192.168.
Over the past decade, Oracle has become one of the most professional databases in the world. For IT professionals, it is important to ensure that Oracle's powerful features are used to improve the productivity of their companies. One of the most effective ways to do this is through Oracle tuning. It has a large number of tuning parameters and techniques to improve the p
Label:Poptest is the only training institute for developing Test and development engineers in China, aiming at the ability of the trainees to be competent in automated testing, performance testing and testing tools development. If you are interested in the course, please consult qq:908821478, call 010-84505200. 1 Overview of Performance optimizationsThis chapter provides an introduction Toperformance
. GC Tuning target has three basic ideas: Reduce GC frequency, can increase the heap space, reduce unnecessary object generation, reduce GC pause time, can be achieved by reducing heap space, using the CMS GC algorithm, avoid full GC, adjust the CMS trigger scale, avoid Promotion Failur E and Concurrent mode failure (the older generation allocates more space, increases the number of GC threads to recover faster), reduces large object generation, and s
purpose of the flow queue data is to determine the data in the table where the data will be keptis insert,update and delete, and each operation generates the corresponding log information. In MySQL, if theThe storage engine that holds the transaction, the amount of this log generation is doubled. And if we go through some mature third-party queue software toThe performance of this queue data processing function will be multiplied.3. Super-Large text
Performance TuningIt is undoubtedly a huge topic and a very important part of many projects. Performance Tuning is well known. After all, performance tuning covers too many aspects.ArticleLet's take a look at the process of performance
efficiency. Some of the original tuning settings, such as Mapjoin, PPD predicate push-down, and so on, have realized the automatic tuning in the continuously evolving products. Different stages of product tuning parameters and details will be inconsistent, but familiar with the tuning ideas and methods can be done ext
This technical article is provided by the "International Oracle user group" (ioug). It is an organization composed of user groups. This organization provides high-quality information, training, networking, and support, to improve the level of Oracle Database experts and database developers. This article is excerpted from the foreseeable procedural performance tuning of Oracle Applications by David Welch. Cl
System Performance Tuning tool under Perf event:linux 2011-05-27 10:35 Liu Ming Ibmdwfont Size:T | T The Perf Event is a performance diagnostic tool that is distributed and maintained with the Linux kernel code, maintained and developed by the kernel community. Perf can be used not only for performance statistical ana
the "CPU" button to start a CPU profiling session, VisualVM will detect all applicationsThe method that is called. When entering a method, the thread issues a "method entry" event when exiting the methodA "Method Exit" event is also issued, and these events contain timestamps. Then VisualVM will put eachThe total execution time and number of invocations of the called method are displayed according to the run-time length.In addition, we can filter the analysis results by the method name filter b
strong support for the application performance diagnosis.Back to top of pagePerformance optimization PracticesAfter introducing some of the commonly used performance diagnostic tools, here are some examples from the JVM layer, the application code layer, and the database tier, combined with our practice in Java application tuning.JVM Tuning: GC PainSogou Commerc
With the Apple WWC Conference out of the latest version of Mac 10.11.5,lz Anel not live a "geek" mood, in the first time with the VMware virtual machine installed. Then a variety of Kaka here to share the experience of optimizing Mac virtual machine.1 removing dashboard from the dockEvery time you point to this inevitable card machine, the glass effect virtual graphics card can be unbearable, decisively mov
Analysis of the Process of neutral performance tuning in software testing-Linux general technology-Linux programming and kernel information. The following is a detailed description. Performance Tuning is undoubtedly a huge topic and a very important part of many projects. It is well known that
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