rework mssql cache metrics
This commit is contained in:
sebastian.poxhofer
parent
b64ccbe683
commit
6dad58fc8f
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@ -137,49 +137,50 @@ type MSSQLCollector struct {
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mssqlScrapeSuccessDesc *prometheus.Desc
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// Win32_PerfRawData_{instance}_SQLServerAccessMethods
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AccessMethodsAUcleanupbatches *prometheus.Desc
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AccessMethodsAUcleanups *prometheus.Desc
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AccessMethodsByreferenceLobCreateCount *prometheus.Desc
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AccessMethodsByreferenceLobUseCount *prometheus.Desc
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AccessMethodsCountLobReadahead *prometheus.Desc
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AccessMethodsCountPullInRow *prometheus.Desc
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AccessMethodsCountPushOffRow *prometheus.Desc
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AccessMethodsDeferreddroppedAUs *prometheus.Desc
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AccessMethodsDeferredDroppedrowsets *prometheus.Desc
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AccessMethodsDroppedrowsetcleanups *prometheus.Desc
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AccessMethodsDroppedrowsetsskipped *prometheus.Desc
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AccessMethodsExtentDeallocations *prometheus.Desc
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AccessMethodsExtentsAllocated *prometheus.Desc
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AccessMethodsFailedAUcleanupbatches *prometheus.Desc
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AccessMethodsFailedleafpagecookie *prometheus.Desc
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AccessMethodsFailedtreepagecookie *prometheus.Desc
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AccessMethodsForwardedRecords *prometheus.Desc
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AccessMethodsFreeSpacePageFetches *prometheus.Desc
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AccessMethodsFreeSpaceScans *prometheus.Desc
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AccessMethodsFullScans *prometheus.Desc
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AccessMethodsIndexSearches *prometheus.Desc
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AccessMethodsInSysXactwaits *prometheus.Desc
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AccessMethodsLobHandleCreateCount *prometheus.Desc
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AccessMethodsLobHandleDestroyCount *prometheus.Desc
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AccessMethodsLobSSProviderCreateCount *prometheus.Desc
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AccessMethodsLobSSProviderDestroyCount *prometheus.Desc
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AccessMethodsLobSSProviderTruncationCount *prometheus.Desc
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AccessMethodsMixedpageallocations *prometheus.Desc
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AccessMethodsPagecompressionattempts *prometheus.Desc
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AccessMethodsPageDeallocations *prometheus.Desc
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AccessMethodsPagesAllocated *prometheus.Desc
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AccessMethodsPagescompressed *prometheus.Desc
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AccessMethodsPageSplits *prometheus.Desc
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AccessMethodsProbeScans *prometheus.Desc
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AccessMethodsRangeScans *prometheus.Desc
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AccessMethodsScanPointRevalidations *prometheus.Desc
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AccessMethodsSkippedGhostedRecords *prometheus.Desc
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AccessMethodsTableLockEscalations *prometheus.Desc
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AccessMethodsUsedleafpagecookie *prometheus.Desc
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AccessMethodsUsedtreepagecookie *prometheus.Desc
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AccessMethodsWorkfilesCreated *prometheus.Desc
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AccessMethodsWorktablesCreated *prometheus.Desc
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AccessMethodsWorktablesFromCacheRatio *prometheus.Desc
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AccessMethodsAUcleanupbatches *prometheus.Desc
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AccessMethodsAUcleanups *prometheus.Desc
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AccessMethodsByreferenceLobCreateCount *prometheus.Desc
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AccessMethodsByreferenceLobUseCount *prometheus.Desc
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AccessMethodsCountLobReadahead *prometheus.Desc
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AccessMethodsCountPullInRow *prometheus.Desc
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AccessMethodsCountPushOffRow *prometheus.Desc
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AccessMethodsDeferreddroppedAUs *prometheus.Desc
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AccessMethodsDeferredDroppedrowsets *prometheus.Desc
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AccessMethodsDroppedrowsetcleanups *prometheus.Desc
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AccessMethodsDroppedrowsetsskipped *prometheus.Desc
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AccessMethodsExtentDeallocations *prometheus.Desc
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AccessMethodsExtentsAllocated *prometheus.Desc
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AccessMethodsFailedAUcleanupbatches *prometheus.Desc
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AccessMethodsFailedleafpagecookie *prometheus.Desc
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AccessMethodsFailedtreepagecookie *prometheus.Desc
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AccessMethodsForwardedRecords *prometheus.Desc
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AccessMethodsFreeSpacePageFetches *prometheus.Desc
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AccessMethodsFreeSpaceScans *prometheus.Desc
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AccessMethodsFullScans *prometheus.Desc
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AccessMethodsIndexSearches *prometheus.Desc
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AccessMethodsInSysXactwaits *prometheus.Desc
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AccessMethodsLobHandleCreateCount *prometheus.Desc
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AccessMethodsLobHandleDestroyCount *prometheus.Desc
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AccessMethodsLobSSProviderCreateCount *prometheus.Desc
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AccessMethodsLobSSProviderDestroyCount *prometheus.Desc
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AccessMethodsLobSSProviderTruncationCount *prometheus.Desc
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AccessMethodsMixedpageallocations *prometheus.Desc
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AccessMethodsPagecompressionattempts *prometheus.Desc
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AccessMethodsPageDeallocations *prometheus.Desc
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AccessMethodsPagesAllocated *prometheus.Desc
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AccessMethodsPagescompressed *prometheus.Desc
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AccessMethodsPageSplits *prometheus.Desc
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AccessMethodsProbeScans *prometheus.Desc
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AccessMethodsRangeScans *prometheus.Desc
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AccessMethodsScanPointRevalidations *prometheus.Desc
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AccessMethodsSkippedGhostedRecords *prometheus.Desc
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AccessMethodsTableLockEscalations *prometheus.Desc
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AccessMethodsUsedleafpagecookie *prometheus.Desc
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AccessMethodsUsedtreepagecookie *prometheus.Desc
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AccessMethodsWorkfilesCreated *prometheus.Desc
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AccessMethodsWorktablesCreated *prometheus.Desc
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AccessMethodsWorktablesFromCacheRatio *prometheus.Desc
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AccessMethodsWorktablesFromCacheRatio_Base *prometheus.Desc
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// Win32_PerfRawData_{instance}_SQLServerAvailabilityReplica
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AvailReplicaBytesReceivedfromReplica *prometheus.Desc
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@ -194,7 +195,8 @@ type MSSQLCollector struct {
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// Win32_PerfRawData_{instance}_SQLServerBufferManager
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BufManBackgroundwriterpages *prometheus.Desc
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BufManBuffercachehitratio *prometheus.Desc
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BufManBuffercachehits *prometheus.Desc
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BufManBuffercachelookups *prometheus.Desc
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BufManCheckpointpages *prometheus.Desc
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BufManDatabasepages *prometheus.Desc
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BufManExtensionallocatedpages *prometheus.Desc
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@ -253,6 +255,7 @@ type MSSQLCollector struct {
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DatabasesGroupCommitTime *prometheus.Desc
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DatabasesLogBytesFlushed *prometheus.Desc
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DatabasesLogCacheHitRatio *prometheus.Desc
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DatabasesLogCacheHitRatio_Base *prometheus.Desc
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DatabasesLogCacheReads *prometheus.Desc
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DatabasesLogFilesSizeKB *prometheus.Desc
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DatabasesLogFilesUsedSizeKB *prometheus.Desc
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@ -317,13 +320,14 @@ type MSSQLCollector struct {
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GenStatsUserConnections *prometheus.Desc
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// Win32_PerfRawData_{instance}_SQLServerLocks
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LocksAverageWaitTimems *prometheus.Desc
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LocksLockRequests *prometheus.Desc
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LocksLockTimeouts *prometheus.Desc
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LocksLockTimeoutstimeout0 *prometheus.Desc
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LocksLockWaits *prometheus.Desc
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LocksLockWaitTimems *prometheus.Desc
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LocksNumberofDeadlocks *prometheus.Desc
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LocksAverageWaitTimems *prometheus.Desc
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LocksAverageWaitTimems_Base *prometheus.Desc
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LocksLockRequests *prometheus.Desc
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LocksLockTimeouts *prometheus.Desc
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LocksLockTimeoutstimeout0 *prometheus.Desc
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LocksLockWaits *prometheus.Desc
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LocksLockWaitTimems *prometheus.Desc
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LocksNumberofDeadlocks *prometheus.Desc
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// Win32_PerfRawData_{instance}_SQLServerMemoryManager
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MemMgrConnectionMemoryKB *prometheus.Desc
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@ -657,11 +661,17 @@ func NewMSSQLCollector() (Collector, error) {
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nil,
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),
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AccessMethodsWorktablesFromCacheRatio: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "accessmethods_worktables_from_cache_ratio"),
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prometheus.BuildFQName(Namespace, subsystem, "accessmethods_worktables_from_cache_hits"),
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"(AccessMethods.WorktablesFromCacheRatio)",
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[]string{"instance"},
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nil,
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),
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AccessMethodsWorktablesFromCacheRatio_Base: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "accessmethods_worktables_from_cache_lookups"),
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"(AccessMethods.WorktablesFromCacheRatio_Base)",
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[]string{"instance"},
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nil,
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),
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// Win32_PerfRawData_{instance}_SQLServerAvailabilityReplica
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AvailReplicaBytesReceivedfromReplica: prometheus.NewDesc(
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@ -726,12 +736,18 @@ func NewMSSQLCollector() (Collector, error) {
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[]string{"instance"},
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nil,
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),
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BufManBuffercachehitratio: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "bufman_buffer_cache_hit_ratio"),
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BufManBuffercachehits: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "bufman_buffer_cache_hits"),
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"(BufferManager.Buffercachehitratio)",
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[]string{"instance"},
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nil,
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),
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BufManBuffercachelookups: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "bufman_buffer_cache_lookups"),
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"(BufferManager.Buffercachehitratio_Base)",
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[]string{"instance"},
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nil,
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),
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BufManCheckpointpages: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "bufman_checkpoint_pages"),
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"(BufferManager.Checkpointpages)",
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@ -1055,8 +1071,14 @@ func NewMSSQLCollector() (Collector, error) {
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nil,
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),
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DatabasesLogCacheHitRatio: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "databases_log_cache_hit_ratio"),
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"(Databases.LogCacheHitRatio)",
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prometheus.BuildFQName(Namespace, subsystem, "databases_log_cache_hits"),
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"(Databases.LogCacheHits)",
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[]string{"instance", "database"},
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nil,
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),
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DatabasesLogCacheHitRatio_Base: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "databases_log_cache_lookups"),
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"(Databases.LogCacheLookups)",
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[]string{"instance", "database"},
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nil,
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),
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@ -1425,8 +1447,14 @@ func NewMSSQLCollector() (Collector, error) {
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// Win32_PerfRawData_{instance}_SQLServerLocks
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LocksAverageWaitTimems: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "locks_average_wait_seconds"),
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"(Locks.AverageWaitTimems)",
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prometheus.BuildFQName(Namespace, subsystem, "locks_wait_time_seconds"),
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"(Locks.LockWaitTime. Total time in ms which locks have been holding resources)",
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[]string{"instance", "resource"},
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nil,
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),
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LocksAverageWaitTimems_Base: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "locks_count"),
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"(Locks.LockCount. count of how often requests have run into locks)",
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[]string{"instance", "resource"},
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nil,
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),
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@ -1862,7 +1890,8 @@ type win32PerfRawDataSQLServerAccessMethods struct {
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Usedtreepagecookie uint64
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WorkfilesCreatedPersec uint64
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WorktablesCreatedPersec uint64
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WorktablesFromCacheRatio uint64
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WorktablesFromCacheHits uint64
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WorktablesFromCacheLookups uint64
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}
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func (c *MSSQLCollector) collectAccessMethods(ch chan<- prometheus.Metric, sqlInstance string) (*prometheus.Desc, error) {
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@ -2177,7 +2206,14 @@ func (c *MSSQLCollector) collectAccessMethods(ch chan<- prometheus.Metric, sqlIn
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ch <- prometheus.MustNewConstMetric(
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c.AccessMethodsWorktablesFromCacheRatio,
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prometheus.CounterValue,
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float64(v.WorktablesFromCacheRatio),
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float64(v.WorktablesFromCacheHits),
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sqlInstance,
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)
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ch <- prometheus.MustNewConstMetric(
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c.AccessMethodsWorktablesFromCacheRatio_Base,
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prometheus.CounterValue,
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float64(v.WorktablesFromCacheLookups),
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sqlInstance,
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)
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return nil, nil
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@ -2281,7 +2317,8 @@ func (c *MSSQLCollector) collectAvailabilityReplica(ch chan<- prometheus.Metric,
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// https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-buffer-manager-object
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type win32PerfRawDataSQLServerBufferManager struct {
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BackgroundwriterpagesPersec uint64
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Buffercachehitratio uint64
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Buffercachehits uint64
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Buffercachelookups uint64
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CheckpointpagesPersec uint64
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Databasepages uint64
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Extensionallocatedpages uint64
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@ -2327,9 +2364,16 @@ func (c *MSSQLCollector) collectBufferManager(ch chan<- prometheus.Metric, sqlIn
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)
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ch <- prometheus.MustNewConstMetric(
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c.BufManBuffercachehitratio,
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c.BufManBuffercachehits,
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prometheus.GaugeValue,
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float64(v.Buffercachehitratio),
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float64(v.Buffercachehits),
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sqlInstance,
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)
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ch <- prometheus.MustNewConstMetric(
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c.BufManBuffercachelookups,
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prometheus.GaugeValue,
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float64(v.Buffercachehits),
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sqlInstance,
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)
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@ -2703,7 +2747,8 @@ type win32PerfRawDataSQLServerDatabases struct {
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DBCCLogicalScanBytesPersec uint64
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GroupCommitTimePersec uint64
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LogBytesFlushedPersec uint64
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LogCacheHitRatio uint64
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LogCacheHits uint64
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LogCacheLookups uint64
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LogCacheReadsPersec uint64
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LogFilesSizeKB uint64
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LogFilesUsedSizeKB uint64
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@ -2821,7 +2866,14 @@ func (c *MSSQLCollector) collectDatabases(ch chan<- prometheus.Metric, sqlInstan
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ch <- prometheus.MustNewConstMetric(
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c.DatabasesLogCacheHitRatio,
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prometheus.GaugeValue,
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float64(v.LogCacheHitRatio),
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float64(v.LogCacheHits),
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sqlInstance, dbName,
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)
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ch <- prometheus.MustNewConstMetric(
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c.DatabasesLogCacheHitRatio_Base,
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prometheus.GaugeValue,
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float64(v.LogCacheLookups),
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sqlInstance, dbName,
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)
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@ -3298,7 +3350,8 @@ func (c *MSSQLCollector) collectGeneralStatistics(ch chan<- prometheus.Metric, s
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// - https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-locks-object
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type win32PerfRawDataSQLServerLocks struct {
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Name string
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AverageWaitTimems uint64
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LockWaitTime uint64
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LockCount uint64
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LockRequestsPersec uint64
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LockTimeoutsPersec uint64
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LockTimeoutstimeout0Persec uint64
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@ -3323,7 +3376,14 @@ func (c *MSSQLCollector) collectLocks(ch chan<- prometheus.Metric, sqlInstance s
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ch <- prometheus.MustNewConstMetric(
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c.LocksAverageWaitTimems,
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prometheus.GaugeValue,
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float64(v.AverageWaitTimems)/1000.0,
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float64(v.LockWaitTime)/1000.0,
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sqlInstance, lockResourceName,
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)
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ch <- prometheus.MustNewConstMetric(
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c.LocksAverageWaitTimems_Base,
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prometheus.GaugeValue,
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float64(v.LockCount)/1000.0,
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sqlInstance, lockResourceName,
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)
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@ -249,7 +249,27 @@ Name | Description | Type | Labels
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_This collector does not yet have explained examples, we would appreciate your help adding them!_
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## Useful queries
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_This collector does not yet have any useful queries added, we would appreciate your help adding them!_
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### Buffer Cache Hit Ratio
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When you read the counter in perfmon you will get the the percentage pages found in the buffer cache. This percentage is calculated internally based on the total number of cache hits divided by the total number of cache lookups over the last few thousand page accesses.
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This collector retrieves the two internal values separately. In order to calculate the Buffer Cache Hit Ratio in PromQL.
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```
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wmi_mssql_bufman_buffer_cache_hits{instance="host:9182", exported_instance="MSSQLSERVER"} /
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wmi_mssql_bufman_buffer_cache_lookups{instance="host:9182", exported_instance="MSSQLSERVER"}
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```
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This principal can be used for following metrics too:
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- AccessMethodsWorktablesFromCacheHitRatio
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- accessmethods_worktables_from_cache_hits
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- accessmethods_worktables_from_cache_lookups
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- LogCacheHitRatio
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- databases_log_cache_hits
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- databases_log_cache_lookups
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- AverageLockWaitTime
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- locks_wait_time_seconds
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- locks_count
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## Alerting examples
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_This collector does not yet have alerting examples, we would appreciate your help adding them!_
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