file system cache

This is a case of a client that was processed 1 months ago, which is roughly the first time a certain RAC node instance was restarted, with alert log we can find that the node 2 instance of the RAC cluster has been forcibly terminated, as follows

Copy Code code as follows: Error_reporting (2047); /* * Class IO (snakevil complete 03.25.04) (v1.0.0.0) * * [Description] * This class is used for processing file systems. * * [function] * * * * * * * * * LIST_DIR ($dir _path); *

Apache Agent returns 502 SolutionError log:Solution:Proxypass/test/http://127.0.0.1:92/test/retry=1 acquire=300 timeout=300proxypassreverse/test/http://127.0.0.1:92/test/TimeoutThe link time-out, in seconds. If not set, Apache waits until there is a

In the previous development, there are many errors or poor performance, and then checked the data have been corrected, here can share:1. mysql Database issues(1) MySQL database if you have previously installed, the installation may occur after the

Basic concepts of load balancing Load balancing is a computer network technology used to distribute loads across multiple computers (computer clusters), network connections, CPUs, disk drives, or other resources to achieve optimal resource usage,

Http://www.centoscn.com/CentOS/help/2014/1014/3940.html A. Memory usage instructionsThe free command provides a more concise view of system memory usage relative to top:[Root@rac1 ~]# FreeTotal used free shared buffers Cachedmem:1035108 1008984 2612

Blocking: When a user process accesses data, if IO is not completed, wait for IO to complete or make a system call to determine whether IO is completeNon-blocking: When a user process accesses data, it returns a status value immediately, whether or

Plug-in Search Path When the GStreamer program is running, search for plug-ins in the following order: PATH gst_plugin_path_1_0 or gst_plugin_path gst_plugin_ System_path_1_0 or gst_plugin_system_path Each environment variable contains a list of

Analysis of LoadRunner Performance Test index Object Counters Descrīption Reference value Memory Available Mbytes The number of physical memory available. If the value of the available MBytes is small (4

window| Tips If you need to reinstall Windows XP, you usually have to reactivate it. In fact, if you back up the Wpa.dbl file in the Windowssystem32 directory the first time you activate it, you don't have to work on the activation. After you reload

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 few years ago I wrote an article on Aix tuning, and now that Aix 7 appears, it is necessary to re-examine the basic tuning that needs to be done on AIX systems. Many technical levels (TL) and some recommendations that have been released may change.

Source: Http://chaoqun.17348.com/2008/08/memcached_work_with_mysqlThis is the experience of Fotolog, the legend of the larger site than Flickr, Fotolog on 21 servers deployed 51 memcached instances, a total of 254G cache space available, cache up to

MySQL's binlog detailedWhat is BinlogThe Binlog log is used to record all statements that have updated data or that have potentially updated data (for example, a delete that does not match any row). Statements are saved as "events," which describe

With the improvement of a large number of default options, MySQL 5.6 has significantly fewer options than the previous version needs tuning. In this article I will describe the configuration items that need to be optimized. InnoDB settings

MySQL Binlog Detailed1. PrefaceThe log is to record every change in the database into a dedicated file, which is called a log file. MySQL only opens the error log by default, because too many logs will affect the processing performance of the system.

Database schema-relatedArchitecture of a Database System. Joseph M. Hellerstein, Michael stonebraker and James Hamiltonone of Michael Stonebraker's papers, the Turing Award winner, specifically describes the architecture of the database and the

With the improvement of a large number of default options, MySQL 5.6 has significantly fewer options than the previous version needs tuning. In this article I will describe the configuration items that need to be optimized. InnoDB settings

First, IntroductionThe Nmon tool helps to display all of the important performance optimization information on one screen and dynamically updates it. This efficient tool can work on any dumb screen, Telnet session, or even dial-up lines. In addition,

Original address: http://www.2cto.com/database/201108/100546.htmlThe MYSQLD server maintains two variables. Global variables affect the global operation of the server. Session variables affect specific client connection-related operations.When the