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Get-DbaLatchStatistic
Post
NAME Get-DbaLatchStatistic
SYNOPSIS
Displays latch statistics from sys.dm_os_latch_stats
SYNTAX
Get-DbaLatchStatistic [-SqlInstance] <Sqlcollaborative.Dbatools.Parameter.DbaInstanceParameter[]>
[[-SqlCredential] <Pscredential>] [[-Threshold] <Int>] [-EnableException <Switch>] [<CommonParameters>]
DESCRIPTION
This command is based off of Paul Randal's post "Advanced SQL Server performance tuning"
Returns:
LatchClass
WaitSeconds
WaitCount
Percentage
AverageWaitSeconds
URL
Reference: https://www.sqlskills.com/blogs/paul/ad ... spinlocks/
https://www.sqlskills.com/blogs/paul/mo ... they-mean/
PARAMETERS
-EnableException [<Switch>]
By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.
This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables
advanced scripting.
Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own
try/catch.
Required? false
Position? named
Default value
Accept pipeline input? False
Accept wildcard characters? false
-SqlCredential [<Pscredential>]
Login to the target instance using alternative credentials. Accepts PowerShell credentials (Get-Credential).
Windows Authentication, SQL Server Authentication, Active Directory - Password, and Active Directory -
Integrated are all supported.
For MFA support, please use Connect-DbaInstance.
Required? false
Position? named
Default value
Accept pipeline input? False
Accept wildcard characters? false
-SqlInstance [<Sqlcollaborative.Dbatools.Parameter.DbaInstanceParameter[]>]
The SQL Server instance. Server version must be SQL Server version 2005 or higher.
Required? false
Position? named
Default value
Accept pipeline input? False
Accept wildcard characters? false
-Threshold [<Int>]
Threshold, in percentage of all latch stats on the system. Default per Paul's post is 95%.
Required? false
Position? named
Default value
Accept pipeline input? False
Accept wildcard characters? false
<CommonParameters>
This cmdlet supports the common parameters: Verbose, Debug,
ErrorAction, ErrorVariable, WarningAction, WarningVariable,
OutBuffer, PipelineVariable, and OutVariable. For more information, see
about_CommonParameters (https:/go.microsoft.com/fwlink/?LinkID=113216).
INPUTS
OUTPUTS
NOTES
Tags: LatchStatistics, Waits
Author: Patrick Flynn (@sqllensman)
Website: https://dbatools.io
Copyright: (c) 2018 by dbatools, licensed under MIT
License: MIT https://opensource.org/licenses/MIT
-------------------------- EXAMPLE 1 --------------------------
PS C:\\>Get-DbaLatchStatistic -SqlInstance sql2008, sqlserver2012
Check latch statistics for servers sql2008 and sqlserver2012
-------------------------- EXAMPLE 2 --------------------------
PS C:\\>Get-DbaLatchStatistic -SqlInstance sql2008 -Threshold 98
Check latch statistics on server sql2008 for thresholds above 98%
-------------------------- EXAMPLE 3 --------------------------
PS C:\\>$output = Get-DbaLatchStatistic -SqlInstance sql2008 -Threshold 100 | Select-Object * |
ConvertTo-DbaDataTable
Collects all latch statistics on server sql2008 into a Data Table.
-------------------------- EXAMPLE 4 --------------------------
PS C:\\>'sql2008','sqlserver2012' | Get-DbaLatchStatistic
Get latch statistics for servers sql2008 and sqlserver2012 via pipline
-------------------------- EXAMPLE 5 --------------------------
PS C:\\>$cred = Get-Credential sqladmin
PS C:\\> Get-DbaLatchStatistic -SqlInstance sql2008 -SqlCredential $cred
Connects using sqladmin credential and returns latch statistics from sql2008
-------------------------- EXAMPLE 6 --------------------------
PS C:\\>$output = Get-DbaLatchStatistic -SqlInstance sql2008
PS C:\\> $output
PS C:\\> foreach ($row in ($output | Sort-Object -Unique Url)) { Start-Process ($row).Url }
Displays the output then loads the associated sqlskills website for each result. Opens one tab per unique URL.
RELATED LINKS
https://dbatools.io/Get-DbaLatchStatistic
SYNOPSIS
Displays latch statistics from sys.dm_os_latch_stats
SYNTAX
Get-DbaLatchStatistic [-SqlInstance] <Sqlcollaborative.Dbatools.Parameter.DbaInstanceParameter[]>
[[-SqlCredential] <Pscredential>] [[-Threshold] <Int>] [-EnableException <Switch>] [<CommonParameters>]
DESCRIPTION
This command is based off of Paul Randal's post "Advanced SQL Server performance tuning"
Returns:
LatchClass
WaitSeconds
WaitCount
Percentage
AverageWaitSeconds
URL
Reference: https://www.sqlskills.com/blogs/paul/ad ... spinlocks/
https://www.sqlskills.com/blogs/paul/mo ... they-mean/
PARAMETERS
-EnableException [<Switch>]
By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.
This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables
advanced scripting.
Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own
try/catch.
Required? false
Position? named
Default value
Accept pipeline input? False
Accept wildcard characters? false
-SqlCredential [<Pscredential>]
Login to the target instance using alternative credentials. Accepts PowerShell credentials (Get-Credential).
Windows Authentication, SQL Server Authentication, Active Directory - Password, and Active Directory -
Integrated are all supported.
For MFA support, please use Connect-DbaInstance.
Required? false
Position? named
Default value
Accept pipeline input? False
Accept wildcard characters? false
-SqlInstance [<Sqlcollaborative.Dbatools.Parameter.DbaInstanceParameter[]>]
The SQL Server instance. Server version must be SQL Server version 2005 or higher.
Required? false
Position? named
Default value
Accept pipeline input? False
Accept wildcard characters? false
-Threshold [<Int>]
Threshold, in percentage of all latch stats on the system. Default per Paul's post is 95%.
Required? false
Position? named
Default value
Accept pipeline input? False
Accept wildcard characters? false
<CommonParameters>
This cmdlet supports the common parameters: Verbose, Debug,
ErrorAction, ErrorVariable, WarningAction, WarningVariable,
OutBuffer, PipelineVariable, and OutVariable. For more information, see
about_CommonParameters (https:/go.microsoft.com/fwlink/?LinkID=113216).
INPUTS
OUTPUTS
NOTES
Tags: LatchStatistics, Waits
Author: Patrick Flynn (@sqllensman)
Website: https://dbatools.io
Copyright: (c) 2018 by dbatools, licensed under MIT
License: MIT https://opensource.org/licenses/MIT
-------------------------- EXAMPLE 1 --------------------------
PS C:\\>Get-DbaLatchStatistic -SqlInstance sql2008, sqlserver2012
Check latch statistics for servers sql2008 and sqlserver2012
-------------------------- EXAMPLE 2 --------------------------
PS C:\\>Get-DbaLatchStatistic -SqlInstance sql2008 -Threshold 98
Check latch statistics on server sql2008 for thresholds above 98%
-------------------------- EXAMPLE 3 --------------------------
PS C:\\>$output = Get-DbaLatchStatistic -SqlInstance sql2008 -Threshold 100 | Select-Object * |
ConvertTo-DbaDataTable
Collects all latch statistics on server sql2008 into a Data Table.
-------------------------- EXAMPLE 4 --------------------------
PS C:\\>'sql2008','sqlserver2012' | Get-DbaLatchStatistic
Get latch statistics for servers sql2008 and sqlserver2012 via pipline
-------------------------- EXAMPLE 5 --------------------------
PS C:\\>$cred = Get-Credential sqladmin
PS C:\\> Get-DbaLatchStatistic -SqlInstance sql2008 -SqlCredential $cred
Connects using sqladmin credential and returns latch statistics from sql2008
-------------------------- EXAMPLE 6 --------------------------
PS C:\\>$output = Get-DbaLatchStatistic -SqlInstance sql2008
PS C:\\> $output
PS C:\\> foreach ($row in ($output | Sort-Object -Unique Url)) { Start-Process ($row).Url }
Displays the output then loads the associated sqlskills website for each result. Opens one tab per unique URL.
RELATED LINKS
https://dbatools.io/Get-DbaLatchStatistic