A Simple Analysis of ORA-01113 Problems

A Simple Analysis of ORA-01113 Problems When starting a database, various problems may always occur in the open stage, such as daunting errors. ORA-01113: file 1 needs media recovery I have noticed that this problem may occur in many scenarios, and

Four full recovery scenarios in archive Mode

Four full recovery scenarios in archive Mode In data backup and recovery, rman is basically used, but from the internal principle of the database, for media recovery, there are actually two things to do: restore and recover.Restore is a copy similar

Oracle Tutorial: kill deadlock process in Oracle

Oracle Tutorial: kill deadlock process in Oracle In Oracle, stored procedures or functions that frequently access packets may cause deadlocks. Scripts of deadlocked objects cannot be run, causing freezing or an exception: too many connections are

Clone and install the database in Oracle 10g and 11g

Clone and install the database in Oracle 10g and 11g Sometimes in many work environments, if the configurations of several machines are similar to each other, we don't need to install the database software over and over again. We can complete the

Deletion policy for expired keys in Redis

Deletion policy for expired keys in Redis We have learned that Redis is a memory database, and data in Redis is stored in the memory in the form of key-value, which is maintained and managed by the Redis server, memory is precious. unwanted data or

Installing Oracle 12C in RHEL7.0

Installing Oracle 12C in RHEL7.0 Installing Oracle 12C in RHEL7.0 1. Check whether the system kernel version meets the requirements 2. Install the rpm package 3. Add the following content to/etc/sysctl. conf and use sysctl-p to make the

Oracle Tutorial: ORA-25153 temporary tablespace is empty, ORA-01652 cannot pass 128

Oracle Tutorial: ORA-25153 temporary tablespace is empty, ORA-01652 cannot pass 128 I wrote a complex select statement, and suddenly Oracle reported: ORA-25153 temporary tablespace is empty, this error, so I checked online, found the following

MySQL database master-slave and master-master replication configuration demonstration

MySQL database master-slave and master-master replication configuration demonstration Experimental System: CentOS 6.6 _ x86_64 Prerequisites: Prepare the compiling environment in advance, and disable both firewall and selinux. Tutorial Description:

Example of Incomplete recovery based on time points

Example of Incomplete recovery based on time points When it comes to Incomplete recovery, there are generally three scenarios: Incomplete recovery based on time points, Incomplete recovery based on scn, and incomplete recovery based on cancel.In all

Learning notes on five types of Redis objects

Learning notes on five types of Redis objects When using Redis, we directly access String, List, Hash, and Set objects ), sortedSet. Basic commands include String (get set) List (lpush rpush lpop rpop lrange) Hash (hget hset hlen hgetall) set (sadd

Oracle 11g partition maintenance (4) -- Exchanging Partitions

Oracle 11g partition maintenance (4) -- Exchanging Partitions Swap Partition You can convert a partition (or sub-partition) into a non-partition table by exchanging data segments, or convert a non-partition table into a partition (or sub-partition)

MySQL primary key constraints and uniqueness constraints

MySQL primary key constraints and uniqueness constraints MySQL primary key constraints and uniqueness constraints are both indexes. The differences between them are: The primary key field can be unique, but the primary key field cannot be NULL.

Connection to MySQL database (driver not loaded) with QT5.5 in CentOS7 (64-bit)

Connection to MySQL database (driver not loaded) with QT5.5 in CentOS7 (64-bit) To connect to MySQL using qt, you need to share the driver of libqsqlmysql. so. The path is under the plugin/sqldrivers directory. At first glance, it is available, but

Oracle 11g DataGuard usage Summary

Oracle 11g DataGuard usage Summary Compared with 10 Gb, Oracle's 11g replica uard has the most advantageous feature of active replica uard. This improvement has prompted users to upgrade the database from 10 Gb to 11 GB, read/write splitting is

Install MySQL in CentOS 7

Install MySQL in CentOS 7 Let's talk about how to install the MySQL database in CentOS 7. I hope it will help you. Download the source from the MySQL official website and use yum for installation: # Wget

Redis command details

Redis command details Redis command details 1. set setnx setex Set associates the value of the string value with the key. If the key already exists, it overwrites the original one. If it does not exist, it is created. Setnx sets the key value as

Redis Command Execution Process

Redis Command Execution Process This problem is simple and simple. The client sends a command request, the server reads the command request, and then the command executor searches for the command implementation, executes the Preparatory operation,

Installation and configuration of Percona XtraDB Cluster

Installation and configuration of Percona XtraDB Cluster Percona XtraDB Cluster is a high availability and scalability solution for MySQL users based on Percona Server. It includes the Write Set REPlication patch and uses the Galera 2.0 library,

Node. js log management package

Node. js log management package Nodejs log management toolkit: log4js and winston 1. Use of log4js 1) Add dependencies to package. json "Log4js ":"~ 0.6.21" 2) Write A log4js configuration file log4js_conf.json {"Appenders ":[{"Type":

The "pitfalls" and key points encountered during Oracle RAC installation (2), oraclerac

The "pitfalls" and key points encountered during Oracle RAC installation (2), oraclerac (1) install dependency packages In addition to system configuration parameters, installing Oracle in Linux is another Trivial operation. This installation

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