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case 7: return "The transaction branch has been heuristically committed."; case 8: / return "The transaction branch may have been heuristically completed."; case 5: return "The transaction branch has been heuristically committed and rolled back."; case 6: return "The transaction branch has been heuristically rolled back."; case 9: return "Resumption must occur

The following Table below shows the signals that are used by the JVM. The signals have been grouped in the table by type or use, as follows:Exceptions: The operating system synchronously rai...

When a signal is raised that is of interest to the JVM, a signal handler is called. This signal handler determines whether it has been called for a Java or non-Java thread. If the signal is for a Java...

1.MustGather: Generating Userdumps For Performance, Hang or High CPU Issues on Windows​If you are experiencing one of the symptoms listed below, this MustGather will assist in collecting userdump (user.dmp) files.​2.MustGather: Performance, Hang, or High CPU Issues on HP-UX​You are experiencing performance degradation, hang, no response, hung threads, CPU starvation, high CPU utilization, deadlocks, timeouts, or network problems, but are unsure what to collect. This MustGather

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http://www.dbspecialists.com/files/presentations/wait_events_10g.html Integrigy Corporation Oracle, Database, audit, security, Session, v$session, sys_context, fine grained auditing, fga 11.9999 Normal 0 7.8 pt 0 2 false false false MicrosoftInternetExplorer4 st1:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-nam

http://www.softcov.com/database/common--oracle-wait-event-descriptions-1.html【REVIEW】 Oracle wait events is an important measure of operating conditions based on Oracle and indicators. The concept of waiting for the event introduced in Oracle7.0.1.2, roughly 100 to wait for the event. In this paper, Oracle common wait events in detail.Oracle wait events is an important measure of operating conditions based on Oracle and indicators. The concept of waiting for the event introduced in

http://www.itpub.net/thread-877110-1-5.htmlSubject: SQL Parsing Flow Diagram Doc ID: Note:32895.1 Type: REFERENCE Last Revision Date: 20-OCT-2005 Status: PUBLISHED PURPOSE ~~~~~~~ The document gives a overview of Parsing. SCOPE & APPLICATION ~~~~~~~~~~~~~~~~~~~ For users requiring a general overview of how parsing works. Introduction ============ This article show the parsing mechanism as a f

ust about every DBA has had to deal with ora-1000 errors, "Maximum open cursors exceeded." This article will discuss initialization parameters that affect open cursors, the difference between open and cached cursors, closing cursors, and monitoring open and cached cursors. Open cursors Open cursors take up space in the shared pool, in the library cache. To keep a renegade session from filling up the library cache, or clogging the CPU with millions of parse requests, w

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In Oracle 10gR2, you can now choose to break this fourth property. Oracle's new asynchronous commit feature essentially allows you to trade durability for speed on a transaction-by-transaction basis. You can choose to break ACID compliance in this way by default, at the instance level; or you can choose to break it at the individual transaction level. Asynchronous Commit By default, Oracle's commits are durable. Oracle writes your changes to disk and doesn't return control of t

emca -deconfig dbcontrol db -repos recreate[@more@]

set autotrace offset autotrace onset autotrace traceonlyset autotrace on explainset autotrace on statisticsset autotrace on explain statisticsset autotrace traceonly explainset autotrace traceonly statisticsset autotrace traceonly explain statisticsset autotrace off explainset autotrace off statisticsset autotrace off explain statisticsSetting autotrace allows to display some statistics and/or an query execution plan for DML statements.set autotrace on: Shows the execution plan as well as sta

wait events to possible causes and gives an overview of the Oracle data that could be most useful to review next. Table 10-1 Wait Events and Potential Causes Wait Event General Area Possible Causes Look for / Examine buffer busy waits Buffer cache, DBWR Depends on buffer type. For example, waits for an index block may be caused by a primary key that is based on an ascending sequence. Examine V$SESSION while the problem is occurring to determine the ty

select * from v$license;V$LICENSE This view contains information about license limits. Column Datatype Description SESSIONS_MAX NUMBER Maximum number of concurrent user sessions allowed for the instance SESSIONS_WARNING NUMBER Warning limit for concurrent user sessions for the instance SESSIONS_CURRENT NUMBER Current number of concurrent user sessions SESSIONS_HIGHWATER NUMBER Highest number of concurrent user sessions since the instance

Rapidshare is a file hosting goldmine if you know how to search it properly. There are basically two ways to do that. First, you can use Google search parameters to search Rapidshare. Several websites offer a basic search interface that does nothing more than to add the parameters to your searches and display the Google search results. Then there is a different kind of website that has its own database and performs searches using it.Rapidshare是一个非常有用文件共享主机。但是它自己并没有提供

from IBMJava 性能准则 在编写Java应用程序时，以下是基本的准则： 使用字符串缓冲区而不是字符串连接，当进行连续字符串操作时要避免不必要地创建那些最终必须经过垃圾回收的对象。 避免连续写入 Java 控制台以减少字符串操作、文本格式化以及输出的花费。 必要时通过使用变量的原语类型来避免对象创建和操作的花费。 经常高速缓存用过的对象以减少必须的垃圾回收数量，并且避免重复创建对象的需求。 尽可能分组本地操作以减少 Java 本地接口（JNI）的调用。 只有在必要时再使用同步方法，以此限制在 JVM 和操作系统中的多

Monitoring and Management Tools You can use the following tools to monitor JVM performance and resource consumption. The tools described in this section are unsupported and experimental, and should be used with that in mind. They may not be available in future JDK versions. Platform support: jconsole: all platforms.jps, jstat, and jstatd: all platforms except Windows 98 and Windows ME. For more information, see Monitoring and Management for the Java Platform. java.lan

Logman.exe loadTOCNode(2, 'moreinformation'); 您可以使用 Logman.exe 工具来完成以下操作： 通过指定远程计算机名称来从一个中央位置远程启动和停止日志文件数据收集。在一台计算机上配置数据收集，然后 从一个中央位置将该配置复制到多台计算机上。查询当前运行的日志和跟踪。示 例 loadTOCNode(3, 'moreinformation'); 如果 Sample_Log 是本地计算机上的一个现有性能日志的名称，logman start Sample_Log 命令将启动该日志。Relog.exe loadTOCNode(

TIME评选出了2009年最佳的50个网站。其中Flickr排名首位，; C H- j$ b4 l v( }8 N FlickrCalifornia CoastlineDeliciousMetafilterpopurlsTwitterSkypeBoing BoingAcademic EarthOpenTableGoogleYouTubeWolfram|AlphaHuluVimeoFora TVCraiglookShop GoodwillAmazonKayakNetflixEtsyPropertyShark.comRedfinWikipediaInternet ArchiveKivaConsumerSearchMetacriticPollsterFacebookPandora and Last.fmMusicoverySpotifySupercookYelpVisuwordsCouchSurfingBabyNameWizard.com's NameVoyagerMintTripItAardvarkdrop.ioIssuuPhotosynth