Galera Indicators updated
This commit is contained in:
Jean-Marie Renouard
parent
3b5b7cf733
commit
5153752349
1 changed files with 219 additions and 206 deletions
425
INTERNALS.md
425
INTERNALS.md
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## MySQLTuner Internals
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## Table of contents
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* [MySQLTuner steps](#mysqltuner-steps)
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* [Get login information steps](#mysqltuner-get-login-information-steps)
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* [System checks](#mysqltuner-system-checks)
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* [Server version checks](#mysqltuner-server-version-checks)
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* [MySQL Storage engine general information](#mysql-storage-engine-general-information)
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## MySQLTuner Internals
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## Table of contents
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* [MySQLTuner steps](#mysqltuner-steps)
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* [Get login information steps](#mysqltuner-get-login-information-steps)
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* [System checks](#mysqltuner-system-checks)
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* [Server version checks](#mysqltuner-server-version-checks)
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* [MySQL Storage engine general information](#mysql-storage-engine-general-information)
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* [Security checks](#mysqltuner-security-checks)
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* [CVE checks](#mysqltuner-cve-checks)
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* [Database information](#mysqltuner-database-information)
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* [Index information](#mysqltuner-index-information)
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* [Connections information](#mysqltuner-connections-information)
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* [Server information](#mysqltuner-server-information)
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* [Sort, join and temp table information](#mysqltuner-sort-join-and-temp-table-information)
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* [Global buffer information](#mysqltuner-global-buffer-information)
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* [Query cache checks](#mysqltuner-query-cache-checks)
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* [Slow queries checks](#mysqltuner-slow-queries-checks)
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* [Replication checks](#mysqltuner-replication-checks)
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* [InnoDB information](#mysqltuner-innodb-information)
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* [ARIADB information](#mysqltuner-ariadb-information)
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* [MYISAM information](#mysqltuner-myisam-information)
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## MySQLTuner steps
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* Header Print
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* Get login information
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* Set up some OS variables
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* Toss variables/status into hashes
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* Get information about the tuning connexion
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* Check current MySQL version
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* Suggest 64-bit upgrade
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* Show enabled storage engines
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* Show informations about databases (option: --dbstat)
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* Show informations about indexes (option: --idxstat)
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* Display some security recommendations
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* Calculate everything we need
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* Print the server stats
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* Print MyISAM stats
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* Print InnoDB stats
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* Print AriaDB stats
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* Print replication info
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* Make recommendations based on stats
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* Close reportfile if needed
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* Dump result if debug is on
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## MySQLTuner get login information steps
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* Is a login possible?
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* Force socket?
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* Remote connection?
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* _Specifying available RAM is required_
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* Got user/pass on command line?
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* mysql-quickbackup credentials available?
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* Plesk credentials available?
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* DirectAdmin credentials available?
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* Debian maintenance account credentials available?
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* Just try a login
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* If working, and .my.cnf isn't there, **WARNING**
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* If working, and .my.cnf is there, okay
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* Prompt for creds on the console
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## MySQLTuner system checks
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* 32-bit w/>2GB RAM check
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## MySQLTuner Server version checks
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* EOL MySQL version check
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* Currently MySQL < 5.1 are EOF considerated.
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* Using 5.5+ version of MySQL for performance issue (asynchronous IO).
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## MySQL Storage engine general information
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* Get storage engine counts/stats
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* Check for DB engines that are enabled but unused
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* Look for fragmented tables
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* Look for auto-increments near capacity
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* Look for table with autoincrement with value near max capacity
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## MySQLTuner security checks
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* Is anonymous user present?
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* Users without passwords
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* Users w/username as password
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* Users w/o host restriction
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* Weak password check (possibly using cracklib later?)
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* Using basic_passwords.txt as password database
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* Password list checks can be avoid (option: --skippassword)
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## MySQLTuner CVE vulnerabilities detection
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* [CVE checks](#mysqltuner-cve-checks)
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* [Database information](#mysqltuner-database-information)
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* [Index information](#mysqltuner-index-information)
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* [Connections information](#mysqltuner-connections-information)
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* [Server information](#mysqltuner-server-information)
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* [Sort, join and temp table information](#mysqltuner-sort-join-and-temp-table-information)
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* [Global buffer information](#mysqltuner-global-buffer-information)
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* [Query cache checks](#mysqltuner-query-cache-checks)
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* [Slow queries checks](#mysqltuner-slow-queries-checks)
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* [Replication checks](#mysqltuner-replication-checks)
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* [InnoDB information](#mysqltuner-innodb-information)
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* [ARIADB information](#mysqltuner-ariadb-information)
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* [MYISAM information](#mysqltuner-myisam-information)
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## MySQLTuner steps
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* Header Print
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* Get login information
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* Set up some OS variables
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* Toss variables/status into hashes
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* Get information about the tuning connexion
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* Check current MySQL version
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* Suggest 64-bit upgrade
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* Show enabled storage engines
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* Show informations about databases (option: --dbstat)
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* Show informations about indexes (option: --idxstat)
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* Display some security recommendations
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* Calculate everything we need
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* Print the server stats
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* Print MyISAM stats
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* Print InnoDB stats
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* Print AriaDB stats
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* Print replication info
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* Make recommendations based on stats
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* Close reportfile if needed
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* Dump result if debug is on
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## MySQLTuner get login information steps
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* Is a login possible?
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* Force socket?
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* Remote connection?
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* _Specifying available RAM is required_
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* Got user/pass on command line?
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* mysql-quickbackup credentials available?
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* Plesk credentials available?
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* DirectAdmin credentials available?
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* Debian maintenance account credentials available?
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* Just try a login
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* If working, and .my.cnf isn't there, **WARNING**
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* If working, and .my.cnf is there, okay
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* Prompt for creds on the console
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## MySQLTuner system checks
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* 32-bit w/>2GB RAM check
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## MySQLTuner Server version checks
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* EOL MySQL version check
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* Currently MySQL < 5.1 are EOF considerated.
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* Using 5.5+ version of MySQL for performance issue (asynchronous IO).
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|
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## MySQL Storage engine general information
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* Get storage engine counts/stats
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* Check for DB engines that are enabled but unused
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* Look for fragmented tables
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* Look for auto-increments near capacity
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* Look for table with autoincrement with value near max capacity
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## MySQLTuner security checks
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* Is anonymous user present?
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* Users without passwords
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* Users w/username as password
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* Users w/o host restriction
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* Weak password check (possibly using cracklib later?)
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* Using basic_passwords.txt as password database
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* Password list checks can be avoid (option: --skippassword)
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## MySQLTuner CVE vulnerabilities detection
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* option: --cvefile
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* Check if your MariaDB or MySQL version contains CVE bulletins.
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## MySQLTuner database information
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* Per database information
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* Rows number
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* Total size
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* Data size
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* Percentage of data size
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* Index size
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* Percentage of index size
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## MySQLTuner index information
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* Top 10 worth selectivity index
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* Per index information
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* Index Cardinality
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* Index Selectivity
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* Misc information about index definition
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* Misc information about index size
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## MySQLTuner Connections information
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* Highest usage of available connections
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* Percentage of used connections (<85%)
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* Percentage of aborted connections (<3%)
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## MySQLTuner server information
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* Uptime: If MySQL started within last 24 hours
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* Bytes received and sent
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* Number of connections
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* Percentage between reads and writes
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* Is binary log activated ?
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* Is GTID mode activated ?
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## MySQLTuner sort, join and temp table information
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* Max memory temporary table size allowed.
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* Percentage of sort using temporary table (<10%)
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* Number of join performed without using indexes (<250)
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* Percentage of temporary table written on disk(<25%)
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* Thread cache (=4)
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* Table cache hit ratio(>2°%)
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* Percentage of open file and open file limit(<85%)
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* Percentage of table locks (<95%)
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* Percentage of binlog cache lock (<90%)
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## MySQLTuner global buffer information
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* Key Buffer
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* Max Tmp Table
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* Per Thread Buffer
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* Read Buffer
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* Read RND Buffer
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* Sort Buffer
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* Thread stack
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* Join Buffer
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* Binlog Cache Buffers size if activated
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## MySQLTuner query cache checks
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* Is Query cache activated ?
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* Query Cache Buffers
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* Query Cache DISABLED, ALL REQUEST or ON DEMAND
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* Query Cache Size
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* Query cache hit ratio (cache efficienty)
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## MySQLTuner memory checks
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* Get total RAM/swap
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* Is there enought memory for max connections reached by MySQL ?
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* Is there enought memory for max connections allowed by MySQL ?
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* Max percentage of memory used(<85%)
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## MySQLTuner slow queries checks
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* Percentage of Slow queries (<5%)
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## MySQLTuner replication checks
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* Is server replication configuarted as slave ?
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* SQL replacation thread running ?
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* IO replacation thread running ?
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* Replication lag in seconds
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* Is Slave configuratedd in read only ?
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## MySQLTuner InnoDB information
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* InnoDB Buffer Pool Size
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* If possible, innodb_buffer_pool_size should be greater data and index size for Innodb Table
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* Innodb_buffer_pool_size should around 75 to 80 % of the available system memory.
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* InnoDB Buffer Pool Instances
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* MySQL needs 1 instanes per 1Go of Buffer Pool
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* innodb_buffer_pool instances = round(innodb_buffer_pool_size / 1Go)
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* innodb_buffer_pool instances must be equals or lower than 64
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* InnoDB Buffer Pool uUsage
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* If more than 20% of InnoDB buffer pool is not used, MySQLTuner raise an alert.
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* InnoDB Read effiency
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* Ratio of read without locks
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* InnoDB Write effiency
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* Ratio of write without locks
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* InnoDB Log Waits
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* Checks that no lock is used on Innodb Log.
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## MySQLTuner ARIADB information
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* Is Aria indexes size is greater than page cache size ?
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* Page cache read hit ratio (>95%)
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* Page cache write hit ratio (>95%)
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## MySQLTuner MYISAM information
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* Key buffer usage (>90%)
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* Is MyISAM indexes size is greater than key buffer size ?
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* Key buffer read hit ratio (>95%)
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* Key buffer write hit ratio (>95%)
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## MySQLTuner database information
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* Per database information
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* Rows number
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* Total size
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* Data size
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* Percentage of data size
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* Index size
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* Percentage of index size
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## MySQLTuner index information
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* Top 10 worth selectivity index
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* Per index information
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* Index Cardinality
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* Index Selectivity
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* Misc information about index definition
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* Misc information about index size
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## MySQLTuner Connections information
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* Highest usage of available connections
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* Percentage of used connections (<85%)
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* Percentage of aborted connections (<3%)
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## MySQLTuner server information
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* Uptime: If MySQL started within last 24 hours
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* Bytes received and sent
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* Number of connections
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* Percentage between reads and writes
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* Is binary log activated ?
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* Is GTID mode activated ?
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## MySQLTuner sort, join and temp table information
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* Max memory temporary table size allowed.
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* Percentage of sort using temporary table (<10%)
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* Number of join performed without using indexes (<250)
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* Percentage of temporary table written on disk(<25%)
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* Thread cache (=4)
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* Table cache hit ratio(>2°%)
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* Percentage of open file and open file limit(<85%)
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* Percentage of table locks (<95%)
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* Percentage of binlog cache lock (<90%)
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## MySQLTuner global buffer information
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* Key Buffer
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* Max Tmp Table
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* Per Thread Buffer
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* Read Buffer
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* Read RND Buffer
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* Sort Buffer
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* Thread stack
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* Join Buffer
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* Binlog Cache Buffers size if activated
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## MySQLTuner query cache checks
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* Is Query cache activated ?
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* Query Cache Buffers
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* Query Cache DISABLED, ALL REQUEST or ON DEMAND
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* Query Cache Size
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* Query cache hit ratio (cache efficienty)
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## MySQLTuner memory checks
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* Get total RAM/swap
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* Is there enought memory for max connections reached by MySQL ?
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* Is there enought memory for max connections allowed by MySQL ?
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* Max percentage of memory used(<85%)
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## MySQLTuner slow queries checks
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* Percentage of Slow queries (<5%)
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## MySQLTuner replication checks
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* Is server replication configuarted as slave ?
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* SQL replacation thread running ?
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* IO replacation thread running ?
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* Replication lag in seconds
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* Is Slave configuratedd in read only ?
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## MySQLTuner InnoDB information
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* InnoDB Buffer Pool Size
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* If possible, innodb_buffer_pool_size should be greater data and index size for Innodb Table
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* Innodb_buffer_pool_size should around 75 to 80 % of the available system memory.
|
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* InnoDB Buffer Pool Instances
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* MySQL needs 1 instanes per 1Go of Buffer Pool
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* innodb_buffer_pool instances = round(innodb_buffer_pool_size / 1Go)
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* innodb_buffer_pool instances must be equals or lower than 64
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* InnoDB Buffer Pool uUsage
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* If more than 20% of InnoDB buffer pool is not used, MySQLTuner raise an alert.
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* InnoDB Read effiency
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* Ratio of read without locks
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* InnoDB Write effiency
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* Ratio of write without locks
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* InnoDB Log Waits
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* Checks that no lock is used on Innodb Log.
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## MySQLTuner ARIADB information
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* Is Aria indexes size is greater than page cache size ?
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* Page cache read hit ratio (>95%)
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* Page cache write hit ratio (>95%)
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## MySQLTuner MYISAM information
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* Key buffer usage (>90%)
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* Is MyISAM indexes size is greater than key buffer size ?
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* Key buffer read hit ratio (>95%)
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* Key buffer write hit ratio (>95%)
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## MySQLTuner Galera information
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* wsrep_ready cluster is ready
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* wsrep_connected node is connected to other nodes
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* wsrep_cluster_status PRIMARY /NON PRIMARY.
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* PRIMARY : Coherent cluster
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* NO PRIMARY : cluster gets several states
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* wsrep_ local_state_comment: Node state
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* SYNCED (uptodate),
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* DONOR(sending information to another node)
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* Joiner(Try to reach cluster group)
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* SYNCED state able to read/write
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* wsrep_cluster_conf_id configuration level must be identical in all nodes
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* wsrep_last_commited committed level must be identical in all nodes
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