wait event

We usually need to view multiple awr reports during O & M. If there are many reports, it will be very troublesome for us to make a copy. There is also a troublesome factor. Generally, our rac has multiple nodes. Then we have to open one copy of

The concept of wait events is introduced from ORACLE7.0.12, with approximately 100 wait events. In ORACLE8.0, this number is increased to about 150. in ORACLE8I The concept of wait events is introduced from ORACLE 7.0.12, with roughly 100 wait

PXDeq: Response. Thisisnormallyconsideredanidleevent, butcancauseexcessiveCPUinsomecases. SolutionReducethedegreeofparallelisminthequeryifexcessive PX Deq: Execution Msg Occurs when a parallel slave is waiting to be told what to do. this is normally

Note: The following indicators are taken from the performance analysis indicators provided by the Oracle performance analysis tool Statspack.   Indicator Name Indicator description Indicator range Indicator Unit 1.

2014-12-18 BaoxinjianI. Summary Oracle's wait events are an important basis for measuring Oracle health and metrics.The concept of wait events was introduced in Oracle7.0.1.2, with roughly 100 waiting events.This number is increased to

Oracle dynamic performance view v $ event_name The V $ EVENT_NAME view lists a set of waiting events. It provides information about sessions that must be waiting for processing: Official Document referenceV $ EVENT_NAME V$EVENT_NAMEDisplays

Oracle online redo log files record all changes to the database (DML, DDL, or structural changes made to the data by the administrator ), it is used for accidental deletion or downtime to use log files for data recovery to ensure data integrity.

Background PostgreSQL 9.6 Dynamic View pg_stat_activity new Wait_event_type, wait_event wait event display. When the session is in a waiting state, wait_event and Wait_event_type are Non-null, indicating the type the session is waiting for.

Related redo wait events1. The following describes 12 directly related log wait events, but only the first few are worth noting.1. Log File parallel writeThis is a major wait event when logs are cached to log files. although the name of this time

After 11 GB, we use the v $ wait_chains view to diagnose the database hang and Contention11g. after the database hang is occupied, we will perform hanganalyze on the database for analysis. after 11 GB, we can use a new view v $ wait_chains to

One. DB file Parallel Write wait eventQuote from the following blog:Http://oradbpedia.com/wiki/Wait_Events_-_db_file_parallel_writeDB file Parallel writeThe db file parallel write wait event belongs to the Oracle database writer (DBWR) process

[Oracle] common wait event db file scattered read for tables that are frequently accessed, if no index is created or an appropriate index is not created, Oracle can only scan the entire table, this will cause a large number of waiting events. During

Active session History ReportActive session HistoryV$active_session_ The history view provides information on extracting session activity at the instance level. The active session is sampled once per minute and stored in a circular buffer in the SGA.

Active session History ReportActive session HistoryV$active_session_ The history view provides information on extracting session activity at the instance level. The active session is sampled once per minute and stored in a circular buffer in the SGA.

Oracle wait events are an important basis and indicator for measuring the operating status of oracle. The concept of wait events is introduced in oracle7.0.1.2, with approximately 100 wait events. In Oracle 8.0, this number was increased to

  The main purpose of a checkpoint is to refresh dirty blocks in a way that has minimal impact on the daily operations of the database. Dirty blocks are constantly generated. How can I refresh the dirty blocks to the disk? Before 8i, Oracle

Complete program at Download: http://download.csdn.net/detail/dijkstar/7913249The event created by the user layer is an handle handle, and the kernel-created kernel mode of kevent is a thing. As a result, events created at the application layer can

from the white master (eel with) to log file sync waiting event Optimization summary, for you puber to learn the reference:The log file Sync average wait time exceeds 7ms, if the waiting time is too long, it means that log write is too long each

Some scenes of Tx-row lock contentionoriginal 2016-07-11 Ishin and Emme Estevan (Eson)Cloud and ink technology expertsThis article is organized from the July 7 Thursday night Cloud and the grace of the great auditorium guests easy to share the

Processing and using the redo log Buffer Configure and use redo log BufferServer Processes making changes to data blocks in the buffer cache generate redo dataInto the log buffer. lgwr begins writing to copy entries from the redo log bufferThe