MySQL read_log_event (): 'found invalid event in binary Log'

MySQL read_log_event (): 'found invalid event in binary Log' MySQL is known for its ease of use. It can install N different versions on the same server to facilitate testing and migration. In addition, mysql is integrated in most Linux systems and

In practice, the libdata1 file of the Zabbix-Server database MySQL is too large.

In practice, the libdata1 file of the Zabbix-Server database MySQL is too large. Today, the root space of our zabbix-server machine is insufficient. I found that the libdata1 file under/var/lib/mysql/is too large, which has reached 41 GB. I

Mysqldump back up and restore a MySQL database

Mysqldump back up and restore a MySQL database Brief Introduction: The mysqldump command can be used to export all specified databases and tables as SQL scripts, which can be used on Mysql in different sections. For example, to upgrade the Mysql

Implementation of MySQL read/write splitting in RHEL6.5

Implementation of MySQL read/write splitting in RHEL6.5 I. Requirements 1. Configure two MySQL servers and one proxy server to implement read/write splitting of the MySQL proxy. 2. You only need to access the MySQL proxy server. The actual SQL query

Deep Redis memory recovery and object sharing

Deep Redis memory recovery and object sharing Memory reclaim The C language does not have the automatic memory recovery function. Redis builds a memory recovery mechanism based on the reference counting technology in its own object system. Through

Oracle and MySQL String concatenation

Oracle and MySQL String concatenation I. MySQL In Java, we usually use the plus sign (+) to concatenate strings. in MySQL, we can also use the plus sign (+). For example: Add test data first Create table test (Id INT,Name VARCHAR (10 ),Score

Oracle inserts timestamp data

Oracle inserts timestamp data Oracle table structure: Create table TEST (Id integer,BIRTHDAY TIMESTAMP); Insert a date to a TIMESTAMP field using JDBC Import java. SQL. Connection;Import java. SQL. DriverManager;Import java. SQL.

Character set 'utf8mb4' is not a compiled character set

Character set 'utf8mb4' is not a compiled character set A Character set error occurred during a recent MySQL Data migration. The prompt is "character set 'utf8mb4' is not a compiled Character set ". That is, the character set utf8mb4 is not a

Impdp terminate ORA-7445 due to fatal errors [kpodpals]

Impdp terminate ORA-7445 due to fatal errors [kpodpals] Basic ElementsThe day before yesterday, I finally successfully exported all the data to the user. Today, the user told me that the exported data cannot be imported. First, I asked the user what

Define system fields in QlikView and qlikview Fields

Define system fields in QlikView and qlikview Fields In Settings-> User Preferences, there is a "Show System Fields" option. If this option is selected, you can select the system field when creating a List Box. Otherwise, no. How to define system

Oracle Installation tutorial, oracle Installation tutorial

Oracle Installation tutorial, oracle Installation tutorial The installation of Oracle reminds me of the time when I installed SQL server last year. I 'd like to record the installation and hope to help some people. First of all, I will not talk much

Use 10046 to view the execution plan and read the trace file, 10046 trace

Use 10046 to view the execution plan and read the trace file, 10046 traceThere are many ways to view the SQL Execution Plan. 10046 events are one of them. different from other SQL Execution plans, when we encounter complicated SQL statements, we can

[Oracle] oracledba8 NOLOGGING, oraclenologging

[Oracle] oracledba8 NOLOGGING, oraclenologging You noticed that the index tablespace in your database requires Recovery. However, instead of discovery a media recovery, you decide D to re-create the indexes in a new tablespace. Which two options wou

Crash recovery and AUTORESTART parameters, crashautorestart

Crash recovery and AUTORESTART parameters, crashautorestartThe impact of this parameter setting has been experienced twice in the production system:For the first time, an unimportant system WAS installed on a virtual machine. All applications of

Implementation of Redis standalone database, redis Standalone Database

Implementation of Redis standalone database, redis Standalone Database Standalone Database implementation Principle The Redis server saves all databases in the db array of the redis. h/redisServer structure in the server status. Each item in the db

Mysql timestamp valid range, mysql range

Mysql timestamp valid range, mysql range Things From_unixtime/unix_timestamp overflow, unavailable Cause The number of seconds since returned by from_unixtime is the result of int type, and the valid range of int Is [-2 ^ 31 + 1, 2 ^

[EBS] Chinese patch6678700 error note,

[EBS] Chinese patch6678700 error note, The following error is reported when an EBS12.1.1 patch is installed in patch6678700: ATTENTION: All workers either have failed or are waiting: FAILED: file XLIFFLoader. class on worker ....ATTENTION: Please

MySQL InnoDB Storage engine lock, mysqlinnodb

MySQL InnoDB Storage engine lock, mysqlinnodbConcept:A lock is used to manage concurrent access to shared files. Innodb locks the database at the row level. However, the innodb Storage engine uses locks in multiple places inside the database to

Installing mysql: warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, how to install dsa

Installing mysql: warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, how to install dsa[Root @ localhost yum. repos. d] # rpm-e -- nodeps mysqlError: package mysql is not installed[Root @ localhost yum. repos. d] # rpm-qa | grep mysql[Root @

[Oracle] export ledba5 A mapping table must have been created., export ledba5mapping

[Oracle] export ledba5 A mapping table must have been created., export ledba5mapping While designing your database, you have created the EMPLOYEES tab Le as an index-organized (IOT). You want to create a bitmap index on The JOD_ID column to make

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