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Foglight for SQL Server (Cartridge) 5.9.3.20 - User Guide

Introduction to this Guide Using Foglight for SQL Server
Viewing the Databases Dashboard Overview Dashboard Advisories Dashboard Monitoring Data Replication Monitoring SQL Performance Reviewing Memory Usage Reviewing the Instance Activity Reviewing Database Usage Reviewing the Services Using the HADR Drilldown Using the Logs Drilldown Reviewing Configuration Settings Viewing User-defined Performance Counters and Collections
Monitoring Business Intelligence Services Administering Foglight for SQL Server
Configuration Settings Managing Foglight for SQL Server Agent Settings Reviewing Foglight for SQL Server Alarms Generating Reports Monitoring SQL Server instances on VMware servers
Glossary
A
Access methods Adhoc SQL Plans Alarm Alert Allow updates Anonymous subscription Authentication AutoClose AutoGrow Automatic Discovery AutoShrink B Batch BCP (Bulk Copy Program) Blocking Books Online Bound trees Buffer Buffer cache Buffer pool Bulk copy Bulkinsert Bulk load C Cache CAL Calibration Cardinality Cartridge Chart Checkpoint process Client network utility CLR Compile Connect Connection Connectivity software CPU Usage Cursors D Data access components Data file Data storage engine Database Database object DataFlow DBCC DBID DBO Deadlock Disk queue length Disk transfer time Disk utilization DiskPerf Distributing instance Distributor DMO Drilldown DTC DTS E Error log Event alert Execution contexts Extended stored procedures Extent External procedures F File Filegroup File cache Foglight Agent Manager Foglight Management Server Foreign key Forwarded records Free buffers Free list Free pages Free potential Free space Freespace scans Full text search G GAM Ghosted records Growth increment GUID H Hash buckets Hashing Heap Hit rate Hit ratio Host name Host process I I/O Index Indid Integrated security Intent Locks J Job K Kernel memory Kernel mode Kill L Latch Lazy writer Licensing Lightweight pooling Lock Lock area Lock escalation Lock mode Log Log cache Log writer Logical I/O LRU LSN M Master MaxSize MDAC Metric Misc.normalized trees Model Monitor page file N Named pipes Net library NIC Null O OBID Object plans OLAP OLAP service OLTP Optimizer Optimizer cache osql P Page life expectancy Paging Panel Parse Parser Per seat licensing Per server licensing Performance alert Physical I/O Physical read Physical write PID Pinned Plan Plan cache Potential growth Prepared SQL plans Primary key Privileged mode Procedure cache Procedure plans Process Profiler Publication database Publisher Publisher databases Publishing server Pull subscription Pulse Push subscription Q Query plan R RAID Random I/O Read ahead Recompile Referential integrity Relational data engine Replication procedure plans Role Rollback S sa Schema locks Sequential I/O Session Severity SGAM Shared locks Show advanced options SMP Sort, Hash, Index Area SPID Spike Spinner SQL Agent Mail SQL Mail SQL Plans SQL Server Agent SQL Server authentication SQL Server books online Standard deviation Stolen pages Stored procedure Support service SYSADMIN role T TDS TempDB Temporary tables and table variables Threshold Torn page detection Transaction Trigger Trigger plans Truncate Trusted U UMS Unused space User connection area User mode V Virtual log file VLF W Waitfor Windows authentication mode Working set
Reference
SQL PI Repository Cold Backup Procedure SQL Performance Investigator Metrics
Active Time All SQL Agents CPU Usage All SQL Agents Resident Memory Usage Availability Average Physical I/O Operations Average SQL Response Time Backup Recovery Wait Blocked Lock Requests Checkpoint Pages CLR Wait CPU Usage CPU Wait Cursor Synchronization Wait Database Replication Wait Deferred Task Worker Wait Degree of Parallelism Disk Utilization DTC CPU Usage DTC Resident Memory Usage Distributed Transaction Wait Executions Ended Executions Started External Procedures Wait Full Scans Full Text Search CPU Usage Full Text Search Resident Memory Usage Full Text Search Wait Free Buffer Wait Hosted Components Wait IO Bulk Load Wait IO Completion Wait IO Data Page Wait IO Wait Latch Buffer Wait Latch Wait Latch Savepoint Wait Lazy Writes Lock Wait Lock Bulk Update Wait Lock Exclusive Wait Lock Intent Wait Lock Requests Lock Schema Wait Lock Shared Wait Lock Update Wait Lock Wait Log Buffer Wait Log Flushes Log Other Wait Log Synchronization Wait Log Wait Log Write Wait Memory Wait Network IO Wait Network IPC Wait Network Mirror Wait Network Wait Non SQL Server CPU Usage Non SQL Resident Memory Usage OLAP CPU Usage OLAP Resident Memory Usage OLEDB Provider Full Text Wait Other CPU Usage Other Miscellaneous Wait Other Wait Overall CPU Page Life Expectancy Page Splits Parallel Coordination Wait Physical I/O Physical Memory Used Physical Page Reads Physical Page Writes Probe Scans Plan Cache Hit Rate Range Scans Rec Ended Duration Remote Provider Wait Run Queue Length Samples Service Broker Wait Session Logons Session Logoffs SQL Agent CPU Usage SQL Agent Resident Memory Usage SQL Executions SQL Mail CPU Usage SQL Mail Resident Memory Usage SQL Recompilations SQL Response Time SQL Server Background CPU Usage SQL Server Cache Memory SQL Server Connections Memory SQL Server Connections Summary SQL Server Foreground CPU Usage SQL Server Resident Memory Usage SQL Server Swap Memory Usage Synchronous Task Wait Table Lock Escalation Target Instance Memory Total CPU Usage Total Instance Memory Virtual Memory Used
Rules Collections and Metrics

Latches and Locks

Purpose

This collection provides statistic details about latches and locks, such as wait time, requests and occurrences.

Type

System.

Collection Sampling Intervals
 
 
Frequency Mode
Collection Interval (In Seconds)

Real-time

20

Online

60

Offline

300

Collection Metrics
 
 
Display Name
Description

Average Latch Hit Wait Time

The wait time of latch requests that were satisfied.

Average Lock Duration

Average duration of blocked lock requests

(100 * Lock Wait) /Blocked Lock Requests.

Average Lock Requests Wait Time

 

Average Lock Wait Time

The average wait time, in milliseconds, of lock requests that were satisfied.

Blocked Lock Requests

Number of lock requests that could not be satisfied immediately, causing the caller to block and wait before acquiring the lock.

Blocked Lock Requests Ratio

The percentage of lock requests that required the caller to wait before acquiring the lock.

A high percentage (over 20 percent), along with high Lock Wait, indicate that the system is not handling locks well and concurrency mechanisms need to be tuned.

Excessive blocking can be a major cause of poor application performance, as the user of an application often does not realize that they are waiting on a lock held by another user. From their point of view, it often seems like their application has stopped responding.

(100 * Blocked Lock Requests) / Lock Requests

Latch Wait Count

Number of latch requests that could not be satisfied immediately, causing the caller to block and wait before acquiring the latch.

Lock Requests

Number of new locks and lock conversions requested from the lock manager.

Lock Timeouts

The number of lock timeouts.

By default, SQL Server never times out locks. However, many applications issue a SET LOCK_TIMEOUT statement to cause SQL Server to time out their locks after the specified interval. This metric shows how often these timeouts are being exceeded.

Lock Timeouts Bigger Than Zero

The number of lock timeouts. By default, SQL Server never times out locks (they will wait forever). However, many applications issue a SET LOCK_TIMEOUT statement to cause SQL Server to timeout their locks after the specified interval. This metric shows how often these timeouts are being exceeded.

Lock Wait Time

Total wait time, in milliseconds, for all lock requests that resulted in a wait.

Number Of Deadlocks

The number of lock requests that resulted in a deadlock.

A Deadlock occurs when multiple SQL Server sessions request conflicting locks in such a way that two locks are blocked by one another.

Number Of Super Latches

Number of latches that are currently SuperLatches.

Super Latches (or Sub-Latches) are latches that are generally used when data is accessed frequently (latches that are in shared lock mode (SH)).

A regular latch is often “Promoted” to a Super/Sub latch in order to reduce the latch acquired on each lookup. Thus, when data is accessed many times for carrying out a read-only operation, the “newly promoted” Super/Sub latch will handle all requests for this data.

An example to a Super/Sub latch would be an index root page accessed frequently.

Super Latch Demotions

Number of SuperLatches that have been demoted to regular latches.

A latch is demoted when SQL Server determines that no thread requests a data help by Super/Sub latch, or when SQL Server needs to write to that data resource and need to acquire exclusive access to that source.

Super Latch Promotions

Number of latches that have been promoted to SuperLatches.

A regular latch is often “Promoted” to a Super/Sub latch in order to reduce the latch acquired on each lookup. Thus, when data is accessed many times for carrying out a read-only operation, the “newly promoted” Super/Sub latch will handle all requests for this data.

An example to a Super/Sub latch would be an index root page accessed frequently.

Total Latch Wait Time

The total amount of time, in milliseconds, that latch requests spent waiting during the last second.

Lock Statistics

Purpose

This collection provides detailed statistics for each lock.

Type

System.

Collection Sampling Intervals
 
 
Frequency Mode
Collection Interval (In Seconds)

Real-time

20

Online

60

Offline

300

Collection Metrics
 
 
Display Name
Description

Deadlocks

The total number of deadlocks for the lock type.

A Deadlock occurs when multiple SQL Server sessions request conflicting locks in such a way that two locks are blocked by one another.

Lock Requests

The summary of all lock requests, both for new locks and lock conversions.

Lock Timeouts

The number of lock requests per second that timed out, including requests for NOWAIT locks.

Lock Type

The name of the lock type.

Total Wait Time (seconds)

The total lock wait time for the lock type.

Total Waits

The total number of wait events for the selected lock type.

Locks List

This collection provides a list of locks used within a SQL Server instance, grouped by the lock type, mode, and status.

Type

SQL Server.

Collection Sampling Intervals
 
 
Frequency Mode
Collection Interval (In Seconds)

Real-time

60

Collection Metrics
 
 
Display Name
Description

SPID

The server process ID of the current user process.

Login Time

The time the session was created.

Login Name

SQL Server Login name.

Database

The database that is being used by the current process.

Index Name

The index that is being used by the current process (if any).

Object Name

The name of the currently locked object.

Count

The number of locks that share the same object and type.

Lock Type

The type of the resource that is currently being locked (Database, Table, Page, Row, Extent and so on).

Mode

The kind of lock that is being applied to the resource (Shared, Exclusive, Update, IntentShared, IntenExclusive and so on).

Status

The status of the lock can be one of the following:

•
WAIT = wait for another resource
•
CNVT = converted to another resource
•
GRANT = the lock has granted

Log Shipping

This collection specifies the Log shipping tree and the primary and secondary servers' file location and operations.

Type

SQL Server.

Collection Sampling Intervals
 
 
Frequency Mode
Collection Interval (In Seconds)

Real-time

20

Collection Metrics
 
 
Display Name
Description

SPID

The SQL process ID of the process that ran the query.

Rowset Key

The row identifier.

Owner

The current primary server.

Server Name

The name of the server (primary server for the parent node, and secondary server for all subsequent child nodes).

Database Name

Refers to either of the following databases:

•
For the parent node, this is the database that is backed up on the source server.
•
For each child node(s), this is the destination database on the secondary server.

Flag Error

An indicator of an error that occurred.

Threshold

The maximum allowed time (in minutes) before a Log Shipping alert occurs.

This parameter can refer to either of the following values:

•
For each parent node, this is the maximum allowed time since the last transaction log backup was made on the source server.
•
For each child node, this is the maximum allowed time between the last backup on the source server and the last restore on the secondary server.

Threshold Alert

The alert displayed in the Error Log drilldown if the threshold is exceeded.

Threshold Alert Enabled

The alert displays only if it is enabled.

Last Change

This parameter can refer to either of the following values:

•
For the parent node, this is the last time that the database was backed up.
•
For the child node(s), this is the last time a file was copied or restored. The Activity Type field displays this information.

Last Change Type

The type of the activity that resulted in the log shipping’s most recent change of state (Backup, Copy or Restore).

Last Backup Filename

The name of the file that was most recently backed up.

Last Backup Last Updated

The time at which the most recent backup operation was carried out.

Outage

During an outage, no alerts will occur when thresholds are exceeded (for both the parent and child nodes).

If this field is blank, no outage will take place.

Backup In Sync

Indicates either of the following backup statuses:

•
The backup is in sync mode.
•
The backup is out of sync and needs to be synchronized.

Backup Delta

The last time a log transaction backup occurred in the primary server.

Last Copied Filename

The last backup file that was copied to the secondary server.

Last Copied Last Updated

The time when the backup file was most recently copied from the primary to the secondary server.

Last Loaded Filename

The name of the backup file that was most recently restored to the secondary server.

Last Loaded Last Updated

The time when the backup file was most recently restored to the secondary server.

Copy Delta

The date when the transaction log backup file was most recently copied to the secondary server.

Copy Enabled

Indicates whether copying is enabled.

Load Enabled

Indicates whether loading is enabled.

Load in Sync

The load synchronization can have either of the following statuses:

•
The load is in sync mode.
•
The load is out of sync and needs to be synchronized.

Load Delta

The date of the last restored transaction log load file to the secondary server.

Primary Server Time

The current timestamp at the primary server.

Secondary Server Time

The current timestamp at the secondary server.

Monitor Server Time

The current timestamp at the monitored server.

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