what pool size

Most ADO. NET data providesProgramUse a connection pool to Improve the Performance of applications built around Microsoft's disconnected. net structure. The application first opens a connection (or obtains a connection handle from the connection

The above section describes the memory pool implemented by using arrays + single-chain tables in amps. This section describes another implementation method. The idea of this method is as follows: its memory pool structure is a double-chain table

MySQL OOM troubleshooting 1 The mysql database of a game business is hit by OOM on multiple servers, but what is the cause of OOM? In fact, the direct cause of OOM is not complicated. It is because the server memory is insufficient and the kernel

New Features of MySQL 5.7 and new features of MySQL 1. IntroductionIn the MySQL circle, we can feel everyone's expectations and enthusiasm for MySQL 5.7. It seems that everyone can't wait to understand, learn, and use MySQL 5.7. So, we can't help

Solution to ORA-4031 errors In the face of ORA-4031 error, your heart will not send? The ORA-4031 can easily cause an abnormal database crash, which will crash when Oracle's core processes fail to get the Shared Pool memory. Of course, ORA-4031 is

Sometimes this error occurs: Note: An unhandled exception occurs during the execution of the current Web request. Check the stack trace information to learn about this error and CodeDetailed information about the cause of the error. Exception

I. Introduction: the most important part of database adjustment is to rewrite the SQL code with poor running efficiency. The SQL code after rewriting may be significantly different from the previous one in terms of running efficiency! However, when

Threadpoolexecutor detailedConstruction method:threadpoolexecutor (int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, BlockingQueue workQueue, ThreadFactory threadFactory, RejectedExecutionHandler handler) Corepoolsize-the

sdk3.0, using the internal thread pool, multithreading concurrently executes. Thread pool size equals 5, up to 128After sdk3.0, a thread is executed using the default serial thread pool, and the next thread is executed sequentially. sdk4.3 when the

Invokeany and InvokeAll explained clearly, our final part is about the execution of the executor process, the actual thread pool execution, in order to understand the process of executor execution, the Java corresponding thread pool must be

Reprint http://www.cnblogs.com/zhujiabin/p/5404771.html Describes the drawbacks of new thread and the use of Java four thread pools, which is also true for Android. This article is a basic article that will share some advanced features of the

thread pool Description:Multithreading technology mainly solves the problem of multiple threads executing in the processor unit, which can significantly reduce the idle time of the processor unit and increase the throughput capacity of the processor

under what circumstances the thread pool is used. 1. Single task processing time is relatively short2. The number of tasks to be addressed is largebenefits of using a thread pool:1. Reduce the time spent on creating and destroying threads and the

Access | data | system One of the major changes introduced by Ado.net is the substitution of the combination of DataTable,DataSet,DataAdapter and DataReader objects for ADO The Recordset object. A DataTable represents a collection of rows in a

a Dispatchers 1.1 Understanding the dispenser The dispatcher is the role of a communications coordinator, primarily responsible for the receipt and delivery of messages. It is primarily based on a certain distribution strategy that controls the

The project is used to the thread pool, but in fact many people are not familiar with the principle, here just tidy up Threadpoolexecutor The Java.uitl.concurrent.ThreadPoolExecutor class is the core class in the thread pool. Construction

Jndi: Specify Jndi name for data source is enabled: Specifies whether the data source should be started. Note: Runtime support for this property is not available in the next release. Statistics Enabled: Defines whether to enable runtime statistics.

Cache Pool:The flush pool is an area in memory that DB2 will use to put data into the buffer pool to improve performance. The buffer pool is too small for each query to still operate on the disk, which does not achieve the buffering effect. The

Transferred from: http://blog.csdn.net/wyzxg/article/details/7700394MySQL official website configuration description Address: http://dev.mysql.com/doc/refman/5.5/en/innodb-parameters.htmlOther references:"High performance MySQL"-8.4.5 innodb buffer

MySQL Root Password Reset1 Login failed, mysqladmin change password failed[Email protected] var]# mysqladmin-u root password ' 123456 'Mysqladmin:connect to server at ' localhost ' failedError: ' Access denied for user ' root ' @ ' localhost '