postgresql performance tuning

can pay attention to the 0.9 release released soon. The developer also rewritten a set of consumer in Java. Combine the two sets of APIs and remove the dependency on zookeeper. It is said that performance has greatly improved OH ~ ~ list of all parameter configurationsBroker default parameters and configurable list of all parameters:http://blog.csdn.net/lizhitao/article/details/25667831Kafka principle, basic concept, broker,producer,consumer,top

System performance has always been a hot topic. Do operation of the past few years have been engaged in performance tuning, writing this article is also a summary of the work.The first step in tuning is to say why tuning? That is, the system analysis, analysis also need to h

SQLSever Performance Tuning (All) dbccopentran how to view disk IO operation information the SETSTATISTICSIOON command is used to display SQLServer information about the disk activity volume generated by the Transact-SQL statement. Me SQL Sever Performance Tuning checkpoint dbcc dropcleanbuffers dbcc freeproccache dbcc

The DB2 tutorial you are looking at is: IBM DB2 basic Performance tuning. Buffer pool If you have experience using DB2 UDB, you should know that the buffer pool is a space in memory that is allocated separately to the DB2 database manager, allowing it to add new data to the database or to respond to a query that returns a buffer from the disk to some data data pages.Because accessing data from memory is bo

Tags: different issues lob STR Peak Multi-table BSP must not1.MySQL Performance Tuning IdeasWhat if a server has a long time load too high/ periodic load is too large , or occasionally stuck how to handle ? is it a cyclical change or an occasional problem ? is a problem with overall server performance , or the question of a single statement? ? specific to a sing

Tags: Profiler Performance Performance Analyzer tuning performance calibrationSQL Server Profiler-performance tuningPerformance has enough reason to become a hot topic. Today's business is fiercely competitive, and if users think that an application is too slow, they will im

Article Title: Linux performance monitoring and tuning (CPU ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. In fact, there are many articles on this part on the Internet. Why is this article still available? There are several reasons why it is the motivation of my tra

Hardware preparation environment: Hard Disk: 16 SAS15KRAID5 with 512 MCacheCPU: AMD4 core two memory: 16 GB software environment: Operating System: RedHatAS4.62.6.9 Hardware preparation environment: Hard Disk: 16 SAS 15 K RAID5 with 512 MCacheCPU: AMD 4-core two-core memory: 16 GB software environment: Operating System: RedHat AS4.6 2.6.9 Hardware preparation environment: Hard drive: 16 SAS 15 k raid 5 with 512 MCache CPU: AMD 4-core two Memory: 16 GB Software environment: Operating System:

conditions, filtering conditions, aggregate queries, and sorting fields as index candidate fields. C. Combine frequently-used fields to form a composite index. The field order of the composite index is the same as that of the primary key. You also need to put the most commonly used fields in front, put the fields with low repetition rate in front. D. Do not add too many indexes to a table because the index affects the insert and update speeds. Indexing is not only a matter of consideration when

Hardware preparation environment: Hard drive: 16 SAS 15 k raid 5 with 512 MCache CPU: AMD 4-core two Memory: 16 GB Software environment: Operating System: RedHat AS4.6 2.6.9-67. ELsmp Mysql: 5.0. Performance Tuning based on different scenarios is as follows: Scenario: Write operations (insert, query, and delete) are intensive, and the data capacity far exceeds the memory size (minimum is more than GB, or ev

Article Source: http://hi.baidu.com/top2top/blog/item/0bea951600a16050f2de322b.html apache2.0 prefork and worker module Performance Tuning The performance improvement of Apache 2.0 is the most attractive. On UNIX systems that support POSIX Threads, Apache can use different MPM to run in a mix of multi-process and multi-thread modes to enhance the scalabi

MySQL Performance tuning my.cnf detailedHttps://blog.linuxeye.cn/379.htmlProvides a MySQL 5.6 version suitable for MY.CNF profiles on 1GB memory VPS (click here to download the file): [Client] Port = 3306 Socket =/tmp/mysql.sock [Mysqld] Port = 3306 Socket =/tmp/mysql.sock Basedir =/usr/local/mysql DataDir =/data/mysql Pid-file =/data/mysql/mysql.pid user = MySQL bind-address =

embedded devices, or memory, hard disk space, etc., by using the method of sacrificing CPU, to obtain the original need more memory or hard disk space to complete the work;3. A very simple time to change the space of the algorithm: the implementation of a, b two variable value exchange. The commonly used algorithm is to use the intermediate variables, and the introduction of additional variables means that more space is to be used, the following algorithm, you can eliminate the intermediate var

Official tools: Web address: HTTP://PAN.BAIDU.COM/S/1PKGRSRPOfficial: Https://download.xamarin.com/profiler/profiler-windows.msiXamarin Profiler, using this tool, helps us to tune software performance to find the bottleneck of the application.A high memory-intensive code call is monitored. Quickly resolve code that affects program performance.For the use of this tool, see:https://developer.xamarin.com/guides/cross-platform/deployment,_testing,_and_met

1 , JAVA Performance Tuning-do not use expressions in loop conditionsWhen we learn about Java Performance Tuning, we often see this passage: In the case of No compilation optimization, in the loop, the loop condition will be repeatedly calculated, if you do not use complex expressions, and the loop condition value is n

a text teaches you database performance tuning (attached to a large hospital real case) Preface An engineer at Microsoft once had a very figurative metaphor for performance tuning: Peeling onions. I also very much agree, let us to a layer of a layer of the outside its mysterious veil. six major factors The followi

Label:MySQL performance checking and tuning methodPublished: October 4, 2009 published by: OurmysqlSource: Sudone.com was read: 3,524 times only 1 ReviewsI have been using MySQL this database software, it works relatively stable, high efficiency. In the face of severe performance problems, there are generally several possibilities: 1, the index is no

, you can copy the collection into an array.Pay attention to redraw and re-typesetting, batch modify style, operate DOM tree offline, cache and reduce access to layout information.Use absolute coordinates in animations, using drag-and-drop proxies.Minimize the number of event handles using event-managed technology.Algorithm and process optimizationThe performance characteristics of the for,while,do-while cycle are similar, and no one is faster or slow

default.Copying files between OSS, currently only supports copying object and does not support copying multipart.General recommendationsJobs * Parallel and CPU cores are 1:1,2:1, but not too bigToo many concurrent numbers will directly fill the network card, the CPU will be crowded. It is recommended to observe the environment CPU, network, process/thread condition while concurrencyReferenceOssutil Large File Breakpoint continuationPlease add a link to the original link descriptionThis article

, default is 2 Reviews: These two parameters control the merging and splitting of the PG directory, and when the number of files in the directory is less than filestore_merge_threshold that, the object files of the directory are merged into the parent directory, and if the number of files is greater than the directory filestore_merge_threshold*16*filestore_split_multiple , the directory is split into two subdirectories. Set a reasonable value to speed up indexing of object files