Recommended articles about event analysis content

SQL*Net more data to client SQL*Net message to client SQL*Net more data from client SQL*Net message from client A friend in the group gave an awr report. Generally speaking, we rarely see SQL* Net waiting events become top events, and if they occur, we still need to clear up these waiting events. ​ ​​ ​ SQL*Net more data to client SQL*Net message to client SQL*Net more data from client SQL*Net message from client A friend in the group gave me an awr report. Generally speaking, we rarely see waiting events such as SQL*Net becoming top events, but if they do occur, we still need to have a clear understanding of these waiting events. Let’s first look at S

1. SQL*Net network-related wait event analysis

Introduction: SQL*Net more data to client SQL*Net message to client SQL*Net more data from client SQL*Net message from client A friend in the group gave an awr report. Generally speaking We rarely see wait events like SQL*Net become top events, but if they occur, we still need to clear up these wait events.

2. 10053 event An analysis case

#Introduction: There are two tables in the test library with consistent data (the table has composite primary key A+B), but DELETE TABLE FROM T1/T2 WHERE is also executed. When A=1 AND ROWNUM100;, the deletion time of T1 table is very long, and the deletion time of T2 table is very fast. Viewing the execution plan in PLSQL or sqlplus is the same, indicating that index range scanning is used. PLAN_TABLE_OUTPUT -------

3. SQLServer 2012's AlwaysOn specifies the data synchronization link to eliminate network jitter

Introduction: Cause of the incident: There has been a recent R&D response. After a database was switched from 08 to 12 environment, write operation submission delays occurred from time to time; Event analysis: After ruling out problems such as system resource contention, preliminary analysis may Due to network jitter, the synchronous mode alwayson node often experiences session timeout waiting for submission. After investigation, it was found that the extended event was not

4. Jquery Ajax Learning Example 7 Ajax All Process Event Analysis Example_jquery

Introduction: JQuery will trigger many events during the execution of Ajax.

5. jQuery source code analysis - Event analysis_jquery

Introduction: For javascript event expansion, all libs are almost the same. With jquery and prototype, yui and Ext, the primary issue to be solved is compatibility. All libs will wrap events and unify their attributes to solve their compatibility.

6. Only IE9/10 supports both onload and onreadystatechange event analysis of script elements_javascript skills

Introduction : From the test results, it can be seen that IE9 has begun to support the onload event of script. We have always used the above two events to determine whether the js file has been loaded.

7. Javascript event analysis in touch screen_javascript skills

Introduction: This article mainly introduces JavaScript events in touch screens, examples analyze the types, principles and related usage techniques of touch screen events. Friends in need can refer to the following

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