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I have re-installed mysql in Linux. After the installation, I cannot start it. The prompt can #39; tconnecttolocalmysqlserverthroughsocket #39; v appears. I have re-installed mysql in Linux. After the installation, I cannot start it. The prompt can #

The test environment is inexplicably deleted from several important data records. Since only the public account is deleted in the binlog, you cannot query who logged on to the database during that time period. The test environment is inexplicably

1. Use SQLPlus to modify the relationship between Oracle sessions and processes: sessions1.1 * processes + 5 Use sys and log on to: SQLgt; show 1. Use SQLPlus to modify the relationship between Oracle sessions and processes: sessions = 1.1 *

Test environment: CentOS6.4x86MySQL5.5.381. What is MySQL multi-instance? Multiple MySQL instances enable multiple different servers on one machine. Test environment: CentOS 6.4x86 MySQL 5.5.38 1. What is MySQL multi-instance? Multiple MySQL

GoldenGate (OGG for short) provides real-time capturing, conversion, and delivery of transaction data in heterogeneous environments. Golden Gate (OGG for short) provides real-time capturing, conversion, and delivery of transaction data in

Step 1: create a directory for storing database files and log files in the $ ORACLE_BASEoradata and $ ORACLE_BAS Step 1: create a directory for storing database files and log-related directories in $ ORACLE_BASE \ oradata and $ ORACLE_BAS

The operating system is SunOS5.10 database version: OracleRAC11.2.0.3.0. This host has two databases, and one node of RAC is located on it. There is another database. The operating system is SunOS 5.10 database version: Oracle RAC 11.2.0.3.0. This

ORA-07445: Exception error: core dump [ldxsnf () + 625] [SIGSEGV ORA-07445: Exception error: core dump [ldxsnf () + 625] [SIGSEGV Error message in ALERT Log: Mon Jan 20 15:03:22 2014Incremental checkpoint up to RBA [0x442f. abd.0], current log

Mysqlslap is a benchmark tool provided by mysql. It has the following advantages: Data Query, simple syntax, and flexible and easy to use. this tool can simulate multiple clients to send query updates to the server concurrently, and provides

In earlier versions, it is much easier to adjust the Innodb_Buffer_Pool_size to take effect only after the mysql process is restarted. Application scenarios of this function: 1. Machines In earlier versions, it is much easier to adjust the

A prerequisite system environment: centos6.1 Script: backs up the specified database on the specified server, transfers it to another backup host through scp, and then sends a backup success email to the specified mailbox: first, in the backup

Learn how Oracle Data Recovery Advisor (DRA) helps us in this situation! Data recovery consultant (DataRecoveryAdvisor) is an Oracle Database Engineer Learn how Oracle Data Recovery Advisor (DRA) helps us in this situation! Data Recovery Advisor is

Mariadb or mysql replication is mostly backward compatible. This means that newer servers can be slave servers of older versions. Replication usually does not significantly increase services Mariadb or mysql replication is mostly backward compatible.

ORA-03113: communication channel at the end of the file process ID4781 view alter. log found that the online log file has problems online method to see is not very familiar with, see a lot of errors or ORA-03113: communication channel at the end of

OCM _ simplify Oracle10.2.0.1.0 installation and upgrade to 10.2.0.2.0 OCM _ simplify Oracle10.2.0.1.0 installation and upgrade to 10.2.0.2.0 I. Here, we mainly use the Oracle-validated package to simplify some configurations for installing the

Top leads to high CPU usage: top Top: Super high CPU usage: top-16:41:04 up 184 days, 2 users, load average: 19.97, 18.38, 18.36 Tasks: 584 total, Top:Top-16:41:04 up 184 days, 2 users, load average: 19.97, 18.38, 18.36Task: 584 total, 1

We will share with you the Oracle control file technology. I want to go into details about the role of control files? It is important for children aged 90 to 5 to control documents. We will share with you the Oracle control file technology. I want

Before Oracle11g, if you want to add a column in a large table and set the default value, it will be a very tragic thing. Sometimes you have to choose the online redefinition function to implement it. Before Oracle 11g, if you want to add a column

MongoDB deployment experiment series of articles, MongoDB as a NoSQL Database, has continued to heat up in recent years, more and more enterprises are trying to replace the original Database with MongoDB MongoDB deployment experiment series of

MongoDB deployment experiment series of articles, MongoDB as a NoSQL Database, has continued to heat up in recent years, more and more enterprises are trying to replace the original Database with MongoDB MongoDB deployment experiment series of