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Oracle Performance AnalysisSoftware Environment: Oracle 11g, dual-machine RAC.Problem:Large table (Tens) query, slow operation, often timeout terminal (ORA-01013: User request to cancel the current operation)Analysis:1) partition Table2) Historical Data archiveSolve:Adoption of Scenario 2). Create history tables, Create Table as Select * from where ...Deletes the table data. The amount of data is to

cache common attribute. You can cache the id of the result set of the object and query the cache lifecycle. When the associated table is modified, the query cache lifecycle ends, the query cache has nothing to do with the session lifecycle and can be performed across sessions. Query cache only applies to query. list (). query. iterate () does not use query cache to query common attributes.Query cache configuration and usage:1. Modify the hibernate. cfg. xml file to enable the query cache. The d

1. Learning ObjectivesLearn more about the working mechanism and usage of level 2 cache in nhive.2. Development Environment and necessary preparationDevelopment Environment: Windows 2003, Visual Studio. NET 2005, SQL Server 2005 Developer EditionPrerequisites: the first five nhibana Learning Series: Start of nhibana learning-1. Start of nhibana learning-to-one, and start of nhibana learning-to-quit, 3-Level

-blocking refers to whether the process needs to wait if the data accessed by the process is not yet ready.Synchronous and asynchronous refers to the mechanism to access data, synchronous refers to the request and wait for the completion of the I/O operation, when the data is ready to be blocked while reading and writing, asynchronous refers to the request data can continue to process other tasks, and then wait for the I/O operation is completed, which makes the process not block when the data r

Label:Windows Azure Platform Family of articles Catalog In the previous section, I explained that before we did the Azure performance test, we first needed to submit the permeability test sheet 　　Windows Azure Handbook (8) Azure Performance Test (1) Next, the author will introduce the performance test, the need to pay attention to the problems to introduce: (1)

PLSQL _ Statistical Information Series 2 _ errors in program performance (CASE) and plsql statistics Created By BaoXinjian I. Summary In a stable database with performance, all jobs must be completed within a certain period of time. In the past, in a banking system, a job was originally completed in 30minutes, but after 3hours, it was still running Excluding the

other elements are downloaded during page rendering.If you find that your page is always in the loading status, it is probably caused by the $ (document). Ready function. You can bind the jquery function to the $ (window). Load event to reduce the CPU usage during page loading.It will be executed after all HTML (including $ (Window). Load (function () {// jquery function initialized after the page is fully loaded .}); Some special effects, such as drag-and-drop, visual effects

other elements are downloaded during page rendering.If you find that your page is always in the loading status, it is probably caused by the $ (document). Ready function. You can bind the jquery function to the $ (window). Load event to reduce the CPU usage during page loading.It will be executed after all HTML (including $ (Window). Load (function () {// jquery function initialized after the page is fully loaded .}); Some special effects, such as drag-and-drop, visual effects an

Use Snapshot isolation to improve system performance. Start Snapshot isolation. this function is available in sql2005. you can use the following connection to find out what is Snapshot isolation and how to do it. starting Snapshot isolation can improve your performance and solve some resource locking problems to varying degrees. Refer: Http://msdn.microsoft.com/zh-cn/library/tcbchxcb (vs.80). aspx Http://ms

Solution 2: optimize the code To do well, you must first sharpen your tools. To optimize the code, you must first find the bottleneck of the Code. The most common method is to add log or print, and delete the code after debugging is complete, which is troublesome. Python also provides many profile tools: profile, cProfile, hotshot, and pystats. However, these tools provide poor readability, the function or row takes the most time at a glance. Python l