Basic MySQL load monitor with no external dependencies Uses memcached to cache the replication lag for a short time. More...
Public Member Functions | |
| __construct ( $parent) | |
| Construct a new LoadMonitor with a given LoadBalancer parent. | |
| clearCaches () | |
| Clear any process and persistent cache of lag times. | |
| getLagTimes ( $serverIndexes, $wiki) | |
| Get an estimate of replication lag (in seconds) for each server. | |
| scaleLoads (&$loads, $group=false, $wiki=false) | |
| Perform pre-connection load ratio adjustment. | |
Public Attributes | |
| LoadBalancer | $parent |
Protected Attributes | |
| BagOStuff | $mainCache |
| BagOStuff | $srvCache |
Private Member Functions | |
| getLagTimeCacheKey () | |
Detailed Description
Basic MySQL load monitor with no external dependencies Uses memcached to cache the replication lag for a short time.
Definition at line 28 of file LoadMonitorMySQL.php.
Constructor & Destructor Documentation
◆ __construct()
| LoadMonitorMySQL::__construct | ( | $parent | ) |
Construct a new LoadMonitor with a given LoadBalancer parent.
- Parameters
-
LoadBalancer $parent
Implements LoadMonitor.
Definition at line 36 of file LoadMonitorMySQL.php.
References $parent, ObjectCache\getLocalClusterInstance(), and ObjectCache\getLocalServerInstance().
Member Function Documentation
◆ clearCaches()
| LoadMonitorMySQL::clearCaches | ( | ) |
Clear any process and persistent cache of lag times.
- Since
- 1.27
Implements LoadMonitor.
Definition at line 135 of file LoadMonitorMySQL.php.
References getLagTimeCacheKey().
◆ getLagTimeCacheKey()
|
private |
Definition at line 141 of file LoadMonitorMySQL.php.
Referenced by clearCaches(), and getLagTimes().
◆ getLagTimes()
| LoadMonitorMySQL::getLagTimes | ( | $serverIndexes, | |
| $wiki | |||
| ) |
Get an estimate of replication lag (in seconds) for each server.
Values may be "false" if replication is too broken to estimate
- Parameters
-
array $serverIndexes string $wiki
- Returns
- array Map of (server index => float|int|bool)
Implements LoadMonitor.
Definition at line 46 of file LoadMonitorMySQL.php.
References $cache, $i, $mainCache, $value, as, getLagTimeCacheKey(), use, and wfDebugLog().
◆ scaleLoads()
| LoadMonitorMySQL::scaleLoads | ( | & | $loads, |
$group = false, |
|||
$wiki = false |
|||
| ) |
Perform pre-connection load ratio adjustment.
- Parameters
-
array &$loads string | bool $group The selected query group. Default: false string | bool $wiki Default: false
Implements LoadMonitor.
Definition at line 43 of file LoadMonitorMySQL.php.
Member Data Documentation
◆ $mainCache
|
protected |
Definition at line 34 of file LoadMonitorMySQL.php.
Referenced by getLagTimes().
◆ $parent
| LoadBalancer LoadMonitorMySQL::$parent |
Definition at line 30 of file LoadMonitorMySQL.php.
Referenced by __construct().
◆ $srvCache
|
protected |
Definition at line 32 of file LoadMonitorMySQL.php.
The documentation for this class was generated from the following file:
- includes/db/loadbalancer/LoadMonitorMySQL.php
