apache spark performance tuning

Want to keep your project running at high performance? Here are some tips you can take to eliminate cache bottlenecks, as well as some other performance tuning recommendations.Most developers think that performance optimization is a complex topic that requires a lot of work experience and relevant knowledge theory. Wel

. htaccess file.# do not let unwanted background processes run.# never write pages or log files on a network disk, such as NFS.# do not let Apache (httpd) run in inetd mode.# Don't let x Windows run on your WEB server, turn off X with Ctrl-alt-backspace.# Avoid using SSI tags.# in the CGI script:* File I/o: The fewer files you open, the better.* Shell command: Use full path to invoke shell command.* If your site is primarily powered by CGI, then use M

performance problems, adjust performance parameters to fix problems, and monitor system performance after adjustment to determine whether to retain changes or roll back. Summary: Collect data to establish a baseline Enable optimization and select appropriate default values Check the chart. Is our optimization correct? Submit or roll back Identify potential

　　MLlib is a distributed machine learning library built on spark that leverages Spark's in-memory computing and the benefits of iterative computing to dramatically improve performance. At the same time, because of the rich expressive force of Spark operator, the algorithm development of large-scale machine learning is no longer complex.MLlib is the implementation

excerpt from: http://uule.iteye.com/blog/2114697Summary of JVM garbage collection and performance tuningSeveral strategies for tuning the JVMFirst, JVM memory model and garbage collection algorithm1. According to the Java Virtual Machine specification, theJVM divides the memory into: New (Young Generation) Tenured (old generation) Permanent generation (Perm) Where new and tenured belon

Tags: blog http os ar using SP file Data artOne, no longer for the Apache process siltation, depletion of memory and troubled0./etc/my.cnf, add the following line to the mysqld paragraph:Log-slow-queries=queries-slow.log Restart MySQL As appropriate, for a period of time, execute the mysqldumpslow command, or view Datadir/queries-slow.log directly, to find out the SQL statement that executes the timeout. Where DataDir is the storage path

The first two blog posts on the deployment and configuration of Apache knowledge, this article will explain in detail the production environment of the Apache service in all aspects of the optimization debugging. Production environment, we certainly will not deploy Apache after the finished take to the line. Light pole on the battlefield waiting to be finished!

effectively improve performance if external storage is used.13. Adjust Linux file descriptor limitsLinux limits the number of file descriptors that any process can open, with the default limit of 1024 per process, which may hinder benchmarking clients (such as Httperf and Apachebench) and the Web server itself from getting the best performance, with one process per connection for

System Performance Tuning for CentOS servers Linux is an open-source operating system that supports various hardware platforms. Linux servers are world-renowned. The main difference between Linux and Windows is that, by default, a Linux server does not provide a GUI (graphical user interface) but a command line interface. The main purpose of the GUI is to efficiently process non-interactive processes. The r

VMware ESX Server is the most popular virtual software PRODUCT on the Intel platform on the current server market. Compared to other virtual software products, the greatest advantage of ESX is that it can greatly reduce the resources occupied by the host system. The ESX server kernel runs directly above the hardware, and the system stability and performance are greatly improved. ESX server is also well-suited for enterprise applications because it sup

Most developers take for granted that performance optimization is complex and requires a lot of experience and knowledge. Well, you can't say it's completely wrong. Optimizing your application for optimal performance is not an easy task. But that doesn't mean that if you don't have the knowledge, you can't do anything. Here are 11 easy-to-follow recommendations and best practices to help you create a well-p

Content:1, the shuffle on the re-description;2, shuffle performance optimization;The core ability is to be able to easily harness shuffle, hash, Sort, tungsten wire plan, to deal with different scenarios, Spark1.6.0 is the default sortbasedshuffleFrom the more general aspects of the shuffle, has been from the hash and sort two point of view on the shuffle==========shuffle Performance

server itself is written in the Java language and needs to run on top of the Java Virtual machine. Java virtual machines are simply an application of the operating system, and other applications, such as Apache, have no intrinsic difference to the operating system. But the operating system is running in a certain hardware environment, including CPU, memory, network card and hard disk and so on. At so many levels, each level of the factors will affect

, that is, the so-called "know each other, the victorious" principle.Purchase Address:http://www.china-pub.com/3501136Course Requirements 1. Have a strong interest in performance testing.2. Need a certain programming foundation, can read basic C language code can. But need to have certain self-study ability, this is the performance completes the performance test

Web server itself to obtain the best performance, each Apache connection uses a process, so it will not be affected, but a single process Web server, such as Zeus is a file descriptor for each connection, therefore, it is easy to be affected by the default limit.The file opening limit is a limit that can be adjusted using the ulimit command. The ulimit-aS command displays the current limit, and the ulimit-

Why do you want performance tuning? Most Linux distributions are designed to be fully compatible with most computers in the marketplace. This is a fairly mixed set of hardware (hard drive, video card, NIC, etc.). So Red Hat, Suse,mandriva and some other distribution vendors have chosen some conservative settings to make sure the installation is successful.Simply put: Your distribution is running well, but

number of errors is less, performance also enhanced 1.3 Tomcat configuration Modify the TOMCAT1/TOMCAT2 configuration file Server.xml to set the Jvmroute: L Configure the Tomcat configuration file (Server.xml) in the 184 server, as shown below: L Configure the Tomcat configuration file (Server.xml) in 234 server, as follows: 1.4 cluster Test 1. Tomcat default home page in 184 server index.html (Path:%tomcat_home%\webapps\root\index.html), added at th

analysis of Web container thread pool server > Application server > (server name) > Thread pool > Webcontainer minimum Size: 10 Maximum size: 50 monitor Web container thread pool maximum by TPV (within acceptable time range), set EJB cache server > Application server > (server name) > EJB tell cache set > EJB cache setting > Cache large Small cache Size: 2053 Purge interval: 3000 For example through TPV monitoring found that Ejbstore () has a high call rate and CPU utilization is very low, can

Talking about linux performance tuning 9: changing system default limits; talking about linux performance tuning 8: Removing unnecessary overhead http://www.2cto.com/os/201307/228393.html After reading the first two articles, we are trying to save resources for our real services. Problem: our service is actually used..

Mapper)With ORM (Object relational Mapper), you can gain reliable performance gains. All the things an ORM can do, can be written manually. However, this requires a senior expert.The most important thing about ORM is "Lazy Loading", that is to say, only when the need to take the value of the time to really do. But you also need to be careful about the side-effects of this mechanism, because this is likely to degrade