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
|
|
@ -1,209 +1,222 @@
|
||||||
## MySQLTuner Internals
|
## MySQLTuner Internals
|
||||||
|
|
||||||
## Table of contents
|
## Table of contents
|
||||||
|
|
||||||
* [MySQLTuner steps](#mysqltuner-steps)
|
* [MySQLTuner steps](#mysqltuner-steps)
|
||||||
* [Get login information steps](#mysqltuner-get-login-information-steps)
|
* [Get login information steps](#mysqltuner-get-login-information-steps)
|
||||||
* [System checks](#mysqltuner-system-checks)
|
* [System checks](#mysqltuner-system-checks)
|
||||||
* [Server version checks](#mysqltuner-server-version-checks)
|
* [Server version checks](#mysqltuner-server-version-checks)
|
||||||
* [MySQL Storage engine general information](#mysql-storage-engine-general-information)
|
* [MySQL Storage engine general information](#mysql-storage-engine-general-information)
|
||||||
* [Security checks](#mysqltuner-security-checks)
|
* [Security checks](#mysqltuner-security-checks)
|
||||||
* [CVE checks](#mysqltuner-cve-checks)
|
* [CVE checks](#mysqltuner-cve-checks)
|
||||||
* [Database information](#mysqltuner-database-information)
|
* [Database information](#mysqltuner-database-information)
|
||||||
* [Index information](#mysqltuner-index-information)
|
* [Index information](#mysqltuner-index-information)
|
||||||
* [Connections information](#mysqltuner-connections-information)
|
* [Connections information](#mysqltuner-connections-information)
|
||||||
* [Server information](#mysqltuner-server-information)
|
* [Server information](#mysqltuner-server-information)
|
||||||
* [Sort, join and temp table information](#mysqltuner-sort-join-and-temp-table-information)
|
* [Sort, join and temp table information](#mysqltuner-sort-join-and-temp-table-information)
|
||||||
* [Global buffer information](#mysqltuner-global-buffer-information)
|
* [Global buffer information](#mysqltuner-global-buffer-information)
|
||||||
* [Query cache checks](#mysqltuner-query-cache-checks)
|
* [Query cache checks](#mysqltuner-query-cache-checks)
|
||||||
* [Slow queries checks](#mysqltuner-slow-queries-checks)
|
* [Slow queries checks](#mysqltuner-slow-queries-checks)
|
||||||
* [Replication checks](#mysqltuner-replication-checks)
|
* [Replication checks](#mysqltuner-replication-checks)
|
||||||
* [InnoDB information](#mysqltuner-innodb-information)
|
* [InnoDB information](#mysqltuner-innodb-information)
|
||||||
* [ARIADB information](#mysqltuner-ariadb-information)
|
* [ARIADB information](#mysqltuner-ariadb-information)
|
||||||
* [MYISAM information](#mysqltuner-myisam-information)
|
* [MYISAM information](#mysqltuner-myisam-information)
|
||||||
|
|
||||||
## MySQLTuner steps
|
## MySQLTuner steps
|
||||||
|
|
||||||
* Header Print
|
* Header Print
|
||||||
* Get login information
|
* Get login information
|
||||||
* Set up some OS variables
|
* Set up some OS variables
|
||||||
* Toss variables/status into hashes
|
* Toss variables/status into hashes
|
||||||
* Get information about the tuning connexion
|
* Get information about the tuning connexion
|
||||||
* Check current MySQL version
|
* Check current MySQL version
|
||||||
* Suggest 64-bit upgrade
|
* Suggest 64-bit upgrade
|
||||||
* Show enabled storage engines
|
* Show enabled storage engines
|
||||||
* Show informations about databases (option: --dbstat)
|
* Show informations about databases (option: --dbstat)
|
||||||
* Show informations about indexes (option: --idxstat)
|
* Show informations about indexes (option: --idxstat)
|
||||||
* Display some security recommendations
|
* Display some security recommendations
|
||||||
* Calculate everything we need
|
* Calculate everything we need
|
||||||
* Print the server stats
|
* Print the server stats
|
||||||
* Print MyISAM stats
|
* Print MyISAM stats
|
||||||
* Print InnoDB stats
|
* Print InnoDB stats
|
||||||
* Print AriaDB stats
|
* Print AriaDB stats
|
||||||
* Print replication info
|
* Print replication info
|
||||||
* Make recommendations based on stats
|
* Make recommendations based on stats
|
||||||
* Close reportfile if needed
|
* Close reportfile if needed
|
||||||
* Dump result if debug is on
|
* Dump result if debug is on
|
||||||
|
|
||||||
## MySQLTuner get login information steps
|
## MySQLTuner get login information steps
|
||||||
|
|
||||||
* Is a login possible?
|
* Is a login possible?
|
||||||
* Force socket?
|
* Force socket?
|
||||||
* Remote connection?
|
* Remote connection?
|
||||||
* _Specifying available RAM is required_
|
* _Specifying available RAM is required_
|
||||||
* Got user/pass on command line?
|
* Got user/pass on command line?
|
||||||
* mysql-quickbackup credentials available?
|
* mysql-quickbackup credentials available?
|
||||||
* Plesk credentials available?
|
* Plesk credentials available?
|
||||||
* DirectAdmin credentials available?
|
* DirectAdmin credentials available?
|
||||||
* Debian maintenance account credentials available?
|
* Debian maintenance account credentials available?
|
||||||
* Just try a login
|
* Just try a login
|
||||||
* If working, and .my.cnf isn't there, **WARNING**
|
* If working, and .my.cnf isn't there, **WARNING**
|
||||||
* If working, and .my.cnf is there, okay
|
* If working, and .my.cnf is there, okay
|
||||||
* Prompt for creds on the console
|
* Prompt for creds on the console
|
||||||
|
|
||||||
## MySQLTuner system checks
|
## MySQLTuner system checks
|
||||||
* 32-bit w/>2GB RAM check
|
* 32-bit w/>2GB RAM check
|
||||||
|
|
||||||
## MySQLTuner Server version checks
|
## MySQLTuner Server version checks
|
||||||
* EOL MySQL version check
|
* EOL MySQL version check
|
||||||
* Currently MySQL < 5.1 are EOF considerated.
|
* Currently MySQL < 5.1 are EOF considerated.
|
||||||
* Using 5.5+ version of MySQL for performance issue (asynchronous IO).
|
* Using 5.5+ version of MySQL for performance issue (asynchronous IO).
|
||||||
|
|
||||||
## MySQL Storage engine general information
|
## MySQL Storage engine general information
|
||||||
|
|
||||||
* Get storage engine counts/stats
|
* Get storage engine counts/stats
|
||||||
* Check for DB engines that are enabled but unused
|
* Check for DB engines that are enabled but unused
|
||||||
* Look for fragmented tables
|
* Look for fragmented tables
|
||||||
* Look for auto-increments near capacity
|
* Look for auto-increments near capacity
|
||||||
* Look for table with autoincrement with value near max capacity
|
* Look for table with autoincrement with value near max capacity
|
||||||
|
|
||||||
## MySQLTuner security checks
|
## MySQLTuner security checks
|
||||||
|
|
||||||
* Is anonymous user present?
|
* Is anonymous user present?
|
||||||
* Users without passwords
|
* Users without passwords
|
||||||
* Users w/username as password
|
* Users w/username as password
|
||||||
* Users w/o host restriction
|
* Users w/o host restriction
|
||||||
* Weak password check (possibly using cracklib later?)
|
* Weak password check (possibly using cracklib later?)
|
||||||
* Using basic_passwords.txt as password database
|
* Using basic_passwords.txt as password database
|
||||||
* Password list checks can be avoid (option: --skippassword)
|
* Password list checks can be avoid (option: --skippassword)
|
||||||
|
|
||||||
## MySQLTuner CVE vulnerabilities detection
|
## MySQLTuner CVE vulnerabilities detection
|
||||||
|
|
||||||
* option: --cvefile
|
* option: --cvefile
|
||||||
* Check if your MariaDB or MySQL version contains CVE bulletins.
|
* Check if your MariaDB or MySQL version contains CVE bulletins.
|
||||||
|
|
||||||
## MySQLTuner database information
|
## MySQLTuner database information
|
||||||
* Per database information
|
* Per database information
|
||||||
* Rows number
|
* Rows number
|
||||||
* Total size
|
* Total size
|
||||||
* Data size
|
* Data size
|
||||||
* Percentage of data size
|
* Percentage of data size
|
||||||
* Index size
|
* Index size
|
||||||
* Percentage of index size
|
* Percentage of index size
|
||||||
|
|
||||||
## MySQLTuner index information
|
## MySQLTuner index information
|
||||||
|
|
||||||
* Top 10 worth selectivity index
|
* Top 10 worth selectivity index
|
||||||
* Per index information
|
* Per index information
|
||||||
* Index Cardinality
|
* Index Cardinality
|
||||||
* Index Selectivity
|
* Index Selectivity
|
||||||
* Misc information about index definition
|
* Misc information about index definition
|
||||||
* Misc information about index size
|
* Misc information about index size
|
||||||
|
|
||||||
## MySQLTuner Connections information
|
## MySQLTuner Connections information
|
||||||
|
|
||||||
* Highest usage of available connections
|
* Highest usage of available connections
|
||||||
* Percentage of used connections (<85%)
|
* Percentage of used connections (<85%)
|
||||||
* Percentage of aborted connections (<3%)
|
* Percentage of aborted connections (<3%)
|
||||||
|
|
||||||
## MySQLTuner server information
|
## MySQLTuner server information
|
||||||
|
|
||||||
* Uptime: If MySQL started within last 24 hours
|
* Uptime: If MySQL started within last 24 hours
|
||||||
* Bytes received and sent
|
* Bytes received and sent
|
||||||
* Number of connections
|
* Number of connections
|
||||||
* Percentage between reads and writes
|
* Percentage between reads and writes
|
||||||
* Is binary log activated ?
|
* Is binary log activated ?
|
||||||
* Is GTID mode activated ?
|
* Is GTID mode activated ?
|
||||||
|
|
||||||
## MySQLTuner sort, join and temp table information
|
## MySQLTuner sort, join and temp table information
|
||||||
* Max memory temporary table size allowed.
|
* Max memory temporary table size allowed.
|
||||||
* Percentage of sort using temporary table (<10%)
|
* Percentage of sort using temporary table (<10%)
|
||||||
* Number of join performed without using indexes (<250)
|
* Number of join performed without using indexes (<250)
|
||||||
* Percentage of temporary table written on disk(<25%)
|
* Percentage of temporary table written on disk(<25%)
|
||||||
* Thread cache (=4)
|
* Thread cache (=4)
|
||||||
* Table cache hit ratio(>2°%)
|
* Table cache hit ratio(>2°%)
|
||||||
* Percentage of open file and open file limit(<85%)
|
* Percentage of open file and open file limit(<85%)
|
||||||
* Percentage of table locks (<95%)
|
* Percentage of table locks (<95%)
|
||||||
* Percentage of binlog cache lock (<90%)
|
* Percentage of binlog cache lock (<90%)
|
||||||
|
|
||||||
## MySQLTuner global buffer information
|
## MySQLTuner global buffer information
|
||||||
|
|
||||||
* Key Buffer
|
* Key Buffer
|
||||||
* Max Tmp Table
|
* Max Tmp Table
|
||||||
* Per Thread Buffer
|
* Per Thread Buffer
|
||||||
* Read Buffer
|
* Read Buffer
|
||||||
* Read RND Buffer
|
* Read RND Buffer
|
||||||
* Sort Buffer
|
* Sort Buffer
|
||||||
* Thread stack
|
* Thread stack
|
||||||
* Join Buffer
|
* Join Buffer
|
||||||
* Binlog Cache Buffers size if activated
|
* Binlog Cache Buffers size if activated
|
||||||
|
|
||||||
## MySQLTuner query cache checks
|
## MySQLTuner query cache checks
|
||||||
|
|
||||||
* Is Query cache activated ?
|
* Is Query cache activated ?
|
||||||
* Query Cache Buffers
|
* Query Cache Buffers
|
||||||
* Query Cache DISABLED, ALL REQUEST or ON DEMAND
|
* Query Cache DISABLED, ALL REQUEST or ON DEMAND
|
||||||
* Query Cache Size
|
* Query Cache Size
|
||||||
* Query cache hit ratio (cache efficienty)
|
* Query cache hit ratio (cache efficienty)
|
||||||
|
|
||||||
## MySQLTuner memory checks
|
## MySQLTuner memory checks
|
||||||
|
|
||||||
* Get total RAM/swap
|
* Get total RAM/swap
|
||||||
* Is there enought memory for max connections reached by MySQL ?
|
* Is there enought memory for max connections reached by MySQL ?
|
||||||
* Is there enought memory for max connections allowed by MySQL ?
|
* Is there enought memory for max connections allowed by MySQL ?
|
||||||
* Max percentage of memory used(<85%)
|
* Max percentage of memory used(<85%)
|
||||||
|
|
||||||
## MySQLTuner slow queries checks
|
## MySQLTuner slow queries checks
|
||||||
|
|
||||||
* Percentage of Slow queries (<5%)
|
* Percentage of Slow queries (<5%)
|
||||||
|
|
||||||
## MySQLTuner replication checks
|
## MySQLTuner replication checks
|
||||||
|
|
||||||
* Is server replication configuarted as slave ?
|
* Is server replication configuarted as slave ?
|
||||||
* SQL replacation thread running ?
|
* SQL replacation thread running ?
|
||||||
* IO replacation thread running ?
|
* IO replacation thread running ?
|
||||||
* Replication lag in seconds
|
* Replication lag in seconds
|
||||||
* Is Slave configuratedd in read only ?
|
* Is Slave configuratedd in read only ?
|
||||||
|
|
||||||
## MySQLTuner InnoDB information
|
## MySQLTuner InnoDB information
|
||||||
|
|
||||||
* InnoDB Buffer Pool Size
|
* InnoDB Buffer Pool Size
|
||||||
* If possible, innodb_buffer_pool_size should be greater data and index size for Innodb Table
|
* If possible, innodb_buffer_pool_size should be greater data and index size for Innodb Table
|
||||||
* Innodb_buffer_pool_size should around 75 to 80 % of the available system memory.
|
* Innodb_buffer_pool_size should around 75 to 80 % of the available system memory.
|
||||||
* InnoDB Buffer Pool Instances
|
* InnoDB Buffer Pool Instances
|
||||||
* MySQL needs 1 instanes per 1Go of Buffer Pool
|
* MySQL needs 1 instanes per 1Go of Buffer Pool
|
||||||
* innodb_buffer_pool instances = round(innodb_buffer_pool_size / 1Go)
|
* innodb_buffer_pool instances = round(innodb_buffer_pool_size / 1Go)
|
||||||
* innodb_buffer_pool instances must be equals or lower than 64
|
* innodb_buffer_pool instances must be equals or lower than 64
|
||||||
* InnoDB Buffer Pool uUsage
|
* InnoDB Buffer Pool uUsage
|
||||||
* If more than 20% of InnoDB buffer pool is not used, MySQLTuner raise an alert.
|
* If more than 20% of InnoDB buffer pool is not used, MySQLTuner raise an alert.
|
||||||
* InnoDB Read effiency
|
* InnoDB Read effiency
|
||||||
* Ratio of read without locks
|
* Ratio of read without locks
|
||||||
* InnoDB Write effiency
|
* InnoDB Write effiency
|
||||||
* Ratio of write without locks
|
* Ratio of write without locks
|
||||||
* InnoDB Log Waits
|
* InnoDB Log Waits
|
||||||
* Checks that no lock is used on Innodb Log.
|
* Checks that no lock is used on Innodb Log.
|
||||||
|
|
||||||
## MySQLTuner ARIADB information
|
## MySQLTuner ARIADB information
|
||||||
|
|
||||||
* Is Aria indexes size is greater than page cache size ?
|
* Is Aria indexes size is greater than page cache size ?
|
||||||
* Page cache read hit ratio (>95%)
|
* Page cache read hit ratio (>95%)
|
||||||
* Page cache write hit ratio (>95%)
|
* Page cache write hit ratio (>95%)
|
||||||
|
|
||||||
|
|
||||||
## MySQLTuner MYISAM information
|
## MySQLTuner MYISAM information
|
||||||
|
|
||||||
* Key buffer usage (>90%)
|
* Key buffer usage (>90%)
|
||||||
* Is MyISAM indexes size is greater than key buffer size ?
|
* Is MyISAM indexes size is greater than key buffer size ?
|
||||||
* Key buffer read hit ratio (>95%)
|
* Key buffer read hit ratio (>95%)
|
||||||
* Key buffer write hit ratio (>95%)
|
* Key buffer write hit ratio (>95%)
|
||||||
|
|
||||||
|
## MySQLTuner Galera information
|
||||||
|
* wsrep_ready cluster is ready
|
||||||
|
* wsrep_connected node is connected to other nodes
|
||||||
|
* wsrep_cluster_status PRIMARY /NON PRIMARY.
|
||||||
|
* PRIMARY : Coherent cluster
|
||||||
|
* NO PRIMARY : cluster gets several states
|
||||||
|
* wsrep_ local_state_comment: Node state
|
||||||
|
* SYNCED (uptodate),
|
||||||
|
* DONOR(sending information to another node)
|
||||||
|
* Joiner(Try to reach cluster group)
|
||||||
|
* SYNCED state able to read/write
|
||||||
|
* wsrep_cluster_conf_id configuration level must be identical in all nodes
|
||||||
|
* wsrep_last_commited committed level must be identical in all nodes
|
||||||
|
|
|
||||||
Loading…
Reference in a new issue