mongodb insert performance tuning

I. Analysis Phase In general, there are often too many areas of concern in the system analysis phase, system functionality, availability, reliability, security requirements tend to attract most of our attention, but we must note that performance is a very important non-functional requirements, must be based on the characteristics of the system to determine its real-time requirements, response time requirements , hardware configuration, and so on. It

Label:MySQL performance tuning and architecture design--1th chapter MySQL Basic introductionPreface:As one of the most popular open source database software, MySQL database software has been widely known. But in order to take care of the readers who are not familiar with MySQL, this chapter will make a brief introduction to MySQL. The main content includes MySQL each function module composition, each module

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. Indexi

. Experiments have found that different indexes can be created on the master/slave database without interfering with each other (this is related to replication configuration). This makes it possible to create more optimized indexes based on the different usage patterns of the master and from the database. I saw on a foreign blog that using the dynamic view of SQL Server 2005, indexes are automatically created based on the usage patterns of the database, just like adaptive indexing mach

, and SQL server database can all display the execution plan of a given statement. I have analyzed in detail the execution plans of these three databases, and there is no essential difference between them. Therefore, the content in this article is suitable for these three databases. Similarly, it should be suitable for the vast majority of other databases. A deep understanding of Single-Table execution is the basis for understanding the multi-Table execution plan. The DM database displays more i

operations, although PHP file operation efficiency is not low;41, optimize the Select SQL statement, as far as possible, as little as possible to insert, update operation (on the update, I was a bad batch);42, as far as possible the use of PHP internal functions (but I have to find a php non-existent function, wasted can write a custom function of time, experience problem ah!);PS: Built-in functions are nearly an order of magnitude more efficient tha

some code that can be used to parse the ISO-8601 date string, and simply rewrite it to use it.Well, just use C to make it look good, but do you believe that we have a better plan!If you can control the date format you are working with, try to choose a Unix timestamp. You can easily convert from timestamp to NSDate:-(nsdate*) Datefromunixtimestamp: (nstimeinterval) timestamp {return [nsdate Datewithtimeintervalsince1970:timestamp]; }This will be faster than using C to parse the date string!It is

be reported as ' too many connections ' error. For the value setting of wait_timeout, it should be judged according to the operation condition of the system.# After the system has been running for a period of time, you can view the current system's connection status through the show Processlist command, if you find a large number of sleep status of the connection process, the parameter setting is too large,# you can make the appropriate adjustments smaller. To set Interactive_timeout and wait_t

This article describes some of the most useful ways to adjust the JSP and servlet to make your servlet and JSP pages respond faster and more scalable. And in the case of increasing the number of users, the system load will show a trend of smooth and long. In this article, I'll use some examples and configuration methods to make your application's performance unexpectedly elevated. Some of these tuning techn

value setting of wait_timeout, it should be judged according to the operation condition of the system.# After the system has been running for a period of time, you can view the current system's connection status through the show Processlist command, if you find a large number of sleep status of the connection process, the parameter setting is too large,# you can make the appropriate adjustments smaller. To set Interactive_timeout and wait_timeout at the same time will not take effect.[Mysqldump

filtering out unwanted records before group by. The following two queries return the same result but the second one is significantly faster.The code is as follows:Low efficiency:SELECT JOB, AVG (SAL)From EMP GROUP job has job = ' president ' and AVG (SAL) >xxxEfficient:SELECT JOB, AVG (SAL)From EMPWHERE JOB = ' President 'OR job = ' MANAGER ' GROUP JOB having and AVG (SAL) >xxx7, usually, if the statement can avoid the use of subqueries, as far as possible without sub-query.Because the overhead

authorize other users with the permissions that they own, usually with the following: With GRANT option to achieve the purpose of authorization.9, we can grant all available permissions for a level to a user through the grant all statement:Grant all on TEST.T4 to ' ABC ';Note: The above five permissions: Table,column,routine the objects that are dependent upon authorization must be present, unlike database level, which can be authorized when the current database does not exist.4.2.4 access Cont

, Running-------------------+-----------------+-------+------------- +--------------------Maxscale> list SerUnknown or missing option for the list command. Valid Sub-commands is:Clients List all clientsDcbs List All DcbsFilters List All FiltersListeners List all listenersModules List all currently loaded modulesMonitors List all monitorsServices List all the servicesServers List all serversSessions List all sessionsThreads List Polling ThreadsCommands List Registered commandsMaxscale> quit 4 tes

SQL Server Performance Tuning entry (graphic version) Step 1: capture sample data during business peaks(About 2 hours ). The tool used is the profiler that comes with sqlserver, also known as the event probe. For example, after entering, click the button on the leftmost side to create a new trail: DBO permission is required for logon, therefore, you can log on with SA or use Windows integrated verification

the optimal number of threads" ) b. Increasing the cache C. Where the insert operation is performed frequently, bulk insert with native SQL (persistence layer using Eclipselink)2. Parameter adjustment A.JVM memory parameters B. Database connection pool parameters3. The function realizes the design adjustment (least wants to see)According to the actual situation to adopt appropriate means adjust

MyEclipse Performance Tuning First experiencea brief introduction to the working environment, MyEclipse2014, you know.There is a Web-based workflow engine in the project, as long as the CPU is almost exhausted (although it looks like 27%, it has completely accounted for one of the cores of my 4-core CPU)A quick way to start profiling:Right-click on the project root directoryCreate a new configuration under

customer_idFrom subscriberwhere Prim_resource_val in (' x271051128 '))and Owner_type = ' P 'By crawling the execution plan, the Subscriber table was found to have gone through a full table scan. This corresponds to the performance impact of the production environment is still relatively large.The tuning of this problem can be fully optimized by the business level and can be referred to http://blog.itpub.ne

Buffer"->: "10.4.3 Sort Buffer and Join Buffer" From ochefRecommendation sequence 2Original article: "Blog: http://www.orawh.com /"->: "Blog: http://www.ixdba.com /" P18Original article: "such as update, delte, insert, create"->: "Such as update, delete, insert, and create" Latest Update: 2009.10.19 From: Jasper CheP108Original article: "TL_WRITE_ALLOW_WRITE"->: "WRITE_ALLOW_WRITE"Original article: "P108 L

} }Look at the comments, the change of the next method to get the data set, the same number of data, the execution took only 12 minutes to complete.81 minutes of the picture is not posted out, run 81 minutes is too pit.12 minutes or too slow, see everyone big blog, so ready to insert data that segment optimization.Http://www.cnblogs.com/linfei721/archive/2013/06/07/3123579.html Public voidAllocateallplans () {varEmployees = _efwor

. However, each update causes the table's query cache to be emptied. So, you can put this field in another table, so that you do not affect the user ID, user name, user role of the constant read, because the query cache will help you to add a lot of performance. In addition, you need to note that these separated fields form the table, you do not regularly join them, otherwise, this performance will be worse