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The latest MHA verification encountered the error DBD: mysql: dr: imp_data_sizeunexpectedly. The DBD package has been installed. Below is the problem The latest MHA verification encountered the error DBD: mysql: dr: imp_data_size unexpectedly. The

RHEL7 is available for download in May 2014. The following information can be found in ldquo of MOS and rdquo Certification: 12.1.0.2 has passed the certification on rhel7. 12.1.0.1 on rhel7 RHEL 7 was available for download in May 2014. The

Oracle11.2.0.4 alert started by dbinstance of a single instance Oracle 11.2.0.4 alert started by db instance of a single instance Oracle 11.2.0.4 alert started by db instance of a single instance Fri Jan 09 03:11:17 2015DIAG started with pid = 1

After Oracle is upgraded to 11.2.0.4, The NUMA warning is displayed in the alert Log. After Oracle is upgraded to 11.2.0.4, The NUMA warning is displayed in the alert Log. Note: the articles related to this article are: After upgrading to 11.

Recently, when optimizing the hierarchical query of Oracle partition tables, I found that partitions are not used. I did an experiment and found that partitions are still usable, but there are some requirements in writing. Recently, when optimizing

In the past, we introduced the method of using mysqldumpslow to analyze slow query logs. As the work progresses, we found another more useful method: To record slow logs to the mysql count. In the past, we introduced the method of using

MySQL environment: master: 192.168.202.129: 3306 slave: 192.168.202.129: 3307,192.168 .202.129: 3307,192.168 .202.130: MySQL environment: master: 192.168.202.129: 3306 slave: 192.168.202.129: 3307,192.168 .202.129: 3307,192.168 .202.130: MySQL

If you have not installed Ubuntu or feel that your Ubuntu system version is low and want to change it, set the swap partition (swap) to a greater value (at least 4 GB) during partitioning ), If you have not installed Ubuntu or feel that your Ubuntu

The Cacti official website provides templates for monitoring MySQL. Only the default port 3306 can be monitored, but the current port is not 3306. How can we monitor it? The Cacti official website provides templates for monitoring MySQL. Only the

Run the command # chkconfig -- listTheprogram to solve MySQL self-startup in Ubuntu. Run the command: # chkconfig -- listThe program Run the following command to solve MySQL self-startup in Ubuntu: # Chkconfig -- listThe program 'chkconfig' is

In project development, it is inevitable that you need to track SQL Execution statements on the database server. By tracking SQL Execution statements, we can determine that When Upper-layer applications are executing SQL statements In project

OracleScheduler is a powerful scheduled scheduling program. It not only schedules jobs running in local databases, but also initiates these jobs on remote hosts. Oracle sched is a powerful scheduled scheduling program. It not only schedules jobs

Redis adopts the persistent RDB mode. Redis uses the copyonwrite mechanism of the fork command. When a snapshot is generated, the entire process is copied out, fork generates a sub-process, and then Redis persistent RDB mode. Redis uses the copy on

In the Oracle10.2.0.3 environment, perform a Master/Slave switchover drill to query the switchover status of the master database after the application is disabled and the master database is restarted: In the Oracle 10.2.0.3 environment, perform a

The deployment of simple Memcached proxy Twemproxy is a lightweight Redis and Memcached proxy, which is mainly used to reduce the number of connections to the backend cache server. Open source by Twitter The deployment of simple Memcached proxy

ORA-21561: OIDgenerationfailed ORA-21561: OID generation failed A very strange problem occurs: Linux5.8 + Oracle 11.2.0.3 When starting the database, an error is reported: [Oracle @ tivoli02 ~] $ Sqlplus/as sysdba SQL * Plus: Release 11.2.0.3.0

I have encountered the problem that MySQL can be connected locally but cannot be connected remotely. I have not recorded the problem. I encountered this problem on the new ECS instance on the cloud today. I will record the solution process. I have

I. MySQL subquery position when one query is another, the subquery is called subquery (the query statement contains nested query statements ). Subquery is also a frequently used Query type. Therefore, Optimization I. MySQL subquery position when one

A MySQL table is created with a field of the Date type. The default value is 0000-00-, and PrepareStatement is used for query. The query result is A MySQL table is created with a field of Date type. The default value is 0000-00-00 00:00:00, and

On Linux, the default maximum number of connections for 64-bit or 32-bit apsaradb for MongoDB instances is 819. We do not know about the Windows platform, and no one may use apsaradb for MongoDB for production on the Windows platform. On Linux, the