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Foglight for SQL Server (Cartridge) 5.9.5.20 - 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
SQL Server Agent's Default Collections Access Methods Agent Alert List Agent Job List Always On Availability Groups Backup Locations Blocking History Blocking List Buffer Cache List Buffer Manager CLR Assemblies Cluster Summary Configuration Database Index Density Vectors Database Index Details Database Index Fragmentation Info Database Index Histogram Database Index List Database Information Database Properties Database Sessions (Session List) Database Summary Database Tables List Databases Deadlock DTC Information Error Log Error Log List Error Log Scan File Groups File Data Flow Statistics File Groups Files Files Drive Total Files Instance Summary Full Text Catalog InMemory OLTP (XTP) Instance Wait Categories Instance Wait Events Job Messages Latches and Locks Lock Statistics Locks List Log Shipping Log Shipping Error Logical Disks Memory Manager Mirroring Mirroring Performance Counters Missing Indexes Plan Cache Distribution Plan Cache List Replication Agents Replication Agent Session Actions Replication Agent Session Merge Articles Replication Agent Sessions Replication Agent Sessions by Type Replication Available Replication Publications Replication Subscriptions Reporting Services Resource Pool Session Data Session Trace SQL PI Instance Statistics SQL Server Connections Summary SQL Server Global Variables SQL Server Host SQL Server Load SQL Server Services SQL Server Throughput SQL Server Version Info SSIS OS Statistics SSIS Summary Statistics Top SQLs Top SQL Batch Text Top SQL Long Text Top SQL Plan Top SQL Short Text Top SQL Summary Traced SQL PA Usability User-defined Performance Counters User-defined Queries Virtualization XTP Session Transactions Statistics

Job Messages

This collection provides a list of the job messages that were displayed as a result of running a specific SQL Server job.

Type

SQL Server.

Collection Sampling Intervals

This collection is an on-demand collection, which has no pre-defined sampling intervals.

Collection Metrics
 
 
Display Name
Description

Message

Text, if any, of a SQL Server error.

Step Name

The name of the step.

Step ID

The ID of the step in the job.

SQL Message ID

ID of any SQL Server error message, which is returned if the job failed.

SQL Message Severity

The severity of any SQL Server error.

Run Status

Status of the job execution.

The run status can have one of the following values:

•
Failed
•
Success
•
Retry
•
Canceled
•
In progress

Message Time

The date and time when the job or step started execution. For an In Progress history, this is the date and time when the history was written.

Run Duration

The time, in seconds, which has elapsed since the beginning of the execution of the job or step format.

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
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