In-depth analysis of Oracle Library Cache

In-depth analysis of Oracle Library Cache In-depth analysis of Oracle Library Cache Each object in the database cache is divided into multiple parts in the database cache for storage. Oracle aims to achieve more flexible memory management, because

Table space-based Incomplete recovery of RMAN (TSPITR)

Table space-based Incomplete recovery of RMAN (TSPITR) Table space-based Incomplete recovery of RMAN (TSPITR) Table Space Time Point recovery (TSPITR): Concept You can execute TSPITR to quickly restore one or more tablespaces to a previous

Building a high-performance database cache for redis master-slave Replication

Building a high-performance database cache for redis master-slave Replication 1. What is redis master-slave replication? Master-Slave replication. When a user writes data to the Master, the data file is sent to Slave through the Redis Sync mechanism,

How to view and delete a unique index in mysql

How to view and delete a unique index in mysql How to view and delete a unique index in mysql. View unique indexes: Show index from mytable; // mytable is the table name. The query result is as follows: After a unique index is

Bison executable not found in PATH by mysql install, bisonexecutable

Bison executable not found in PATH by mysql install, bisonexecutable [Root @ luozhonghua mysql-5.5.21] # cmake.-DCMAKE_INSTALL_PREFIX =/usr/local/mysql-DMYSQL_DATADIR =/data/mysql-DSYSCONFDIR =/etc -- Check size of pthread_t-- Check size of

Online expansion of database UNDO tablespaces and expansion of database undo tables

Online expansion of database UNDO tablespaces and expansion of database undo tables Log on to the oracle database server with an ORACLE account Method 1: View the tablespace name and file location: select tablespace_name, file_id,

MySQL batch SQL statement and mysql batch SQL statement

MySQL batch SQL statement and mysql batch SQL statement MySQL supports batch processing to execute a batch of SQL statements. The following example shows how MySQL executes SQL statements in windows batch processing. Create table test (id int, name

ORACLE uses with as and hint materialize to optimize SQL to solve low FILTER efficiency and hintmaterialize

ORACLE uses with as and hint materialize to optimize SQL to solve low FILTER efficiency and hintmaterializeZookeeper During project creation, a page uses SQL statements similar to the following to query data, I replaced the table name and field in

Adjusting the size of oracle sga causes ORA-00851 and ORA-00844 errors, sgaora-00844

Adjusting the size of oracle sga causes ORA-00851 and ORA-00844 errors, sgaora-00844Today, I adjusted the sga size. As a result, the following error is returned when I restart the database.SQL> alter system set sga_max_size = 1024 M scope =

How to obtain the variable value bound to an oracle SQL statement, oraclesql

How to obtain the variable value bound to an oracle SQL statement, oraclesql When diagnosing SQL Performance problems, we sometimes need to obtain the actual value of the variable it binds, and then bring the actual value into the SQL statement, use

How does navicat import SQL files?

How does navicat import SQL files? Tools-data transmission-Files How does navicat import SQL files? Navicat 8,Click the one that runs the SQL file. How can I import a local SQL database file to a mysql database? How can I use Navicat for MySQL?

Set the maximum number of mysql connections in CentOS to 1040 too persistent connection and centosmysql.

Set the maximum number of mysql connections in CentOS to 1040 too persistent connection and centosmysql.When the maximum number of connections is small, the error "1040 too connection" may occur.You can modify the configuration file to modify the

SSRS Fields cannot be used in page headers or footers, ssrsfooters

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MYSQL table errors when writing Chinese characters or assigning values to fields. mysql assigns values.

MYSQL table errors when writing Chinese characters or assigning values to fields. mysql assigns values. -- When modifying the field value or writing it directly, Chinese characters become garbled. [Note the Database Name and remember to modify it.] -

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In-depth analysis of MySQL ERROR 1045 (28000) and mysql28000

In-depth analysis of MySQL ERROR 1045 (28000) and mysql28000 After a user is created in MySQL over the past few days, the access request is denied. The ERROR code is ERROR 1045 (28000 ). I searched the internet for a long time and found many

Dba_hist_ SQL _plan, dbahistsqlstat

Dba_hist_ SQL _plan, dbahistsqlstat I would like to express my gratitude for the help of elders who have prepared this article. The applicable oracle database version is oracle 10 Gb or later.   This view is important because one column in this view

[Translated from mos] ABMR: A method to test the Recover feature of the Automatic Block in the asm environment, mosabmr

[Translated from mos] ABMR: A method to test the Recover feature of the Automatic Block in the asm environment, mosabmrABMR: how to test the Recover feature of the Automatic Block in the asm EnvironmentReference Original:ABMR: How to test Automatic

Analysis of slow expdp backup and expdp backup

Analysis of slow expdp backup and expdp backup -- Export Problem Analysis-- Two time Statement Analysis: This statement exports only 4,059,292 of the Data. After 10 minutes, the data does not continue to be exported.Snap Id Snap Time Sessions

How to restore the FlashBack Delete table by mistake in PLSQL flash?

How to restore the FlashBack Delete table by mistake in PLSQL flash? 1. SCN Concept After the Oracle database is updated, the SCN is automatically maintained by the DBMS to accumulate an increasing number. There are four SCN types in the Oracle

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