functions/Get-DbaTopResourceUsage.ps1
|
function Get-DbaTopResourceUsage { <# .SYNOPSIS Returns the top 20 resource consumers for cached queries based on four different metrics: duration, frequency, IO, and CPU. .DESCRIPTION Returns the top 20 resource consumers for cached queries based on four different metrics: duration, frequency, IO, and CPU. This command is based off of queries provided by Michael J. Swart at http://michaeljswart.com/go/Top20 Per Michael: "I've posted queries like this before, and others have written many other versions of this query. All these queries are based on sys.dm_exec_query_stats." .PARAMETER SqlInstance Allows you to specify a comma separated list of servers to query. .PARAMETER SqlCredential Allows you to login to servers using SQL Logins as opposed to Windows Auth/Integrated/Trusted. To use: $cred = Get-Credential, this pass this $cred to the param. Windows Authentication will be used if DestinationSqlCredential is not specified. To connect as a different Windows user, run PowerShell as that user. .PARAMETER Database The database(s) to process - this list is auto-populated from the server. If unspecified, all databases will be processed. .PARAMETER ExcludeDatabase The database(s) to exclude - this list is auto-populated from the server .PARAMETER ExcludeSystem This will exclude system objects like replication procedures from being returned. .PARAMETER Type By default, all Types run but you can specify one or more of the following: Duration, Frequency, IO, or CPU .PARAMETER Limit By default, these query the Top 20 worst offenders (though more than 20 results can be returend if each of the top 20 have more than 1 subsequent result) .PARAMETER EnableException 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. .NOTES Tags: Query, Performance Website: https://dbatools.io Copyright: (C) Chrissy LeMaire, clemaire@gmail.com License: GNU GPL v3 https://opensource.org/licenses/GPL-3.0 .LINK https://dbatools.io/Get-DbaTopResourceUsage .EXAMPLE Get-DbaTopResourceUsage -SqlInstance sql2008, sql2012 Return the 80 (20 x 4 types) top usage results by duration, frequency, IO, and CPU servers for servers sql2008 and sql2012 .EXAMPLE Get-DbaTopResourceUsage -SqlInstance sql2008 -Type Duration, Frequency -Database TestDB Return the highest usage by duration (top 20) and frequency (top 20) for the TestDB on sql2008 .EXAMPLE Get-DbaTopResourceUsage -SqlInstance sql2016 -Limit 30 Return the highest usage by duration (top 30) and frequency (top 30) for the TestDB on sql2016 .EXAMPLE Get-DbaTopResourceUsage -SqlInstance sql2008, sql2012 -ExcludeSystem Return the 80 (20 x 4 types) top usage results by duration, frequency, IO, and CPU servers for servers sql2008 and sql2012 without any System Objects .EXAMPLE Get-DbaTopResourceUsage -SqlInstance sql2016| Select * Return all the columns plus the QueryPlan column #> [CmdletBinding()] param ( [parameter(Position = 0, Mandatory = $true, ValueFromPipeline = $True)] [Alias("ServerInstance", "SqlServer", "SqlServers")] [DbaInstanceParameter[]]$SqlInstance, [PSCredential]$SqlCredential, [Alias("Databases")] [object[]]$Database, [object[]]$ExcludeDatabase, [ValidateSet("All", "Duration", "Frequency", "IO", "CPU")] [string[]]$Type = "All", [int]$Limit = 20, [switch][Alias('Silent')]$EnableException, [switch]$ExcludeSystem ) begin { $instancecolumns = " SERVERPROPERTY('MachineName') AS ComputerName, ISNULL(SERVERPROPERTY('InstanceName'), 'MSSQLSERVER') AS InstanceName, SERVERPROPERTY('ServerName') AS SqlInstance, " if ($database) { $wheredb = " and coalesce(db_name(st.dbid), db_name(cast(pa.value AS INT)), 'Resource') in ('$($database -join '', '')')" } if ($ExcludeDatabase) { $wherenotdb = " and coalesce(db_name(st.dbid), db_name(cast(pa.value AS INT)), 'Resource') notin '$($excludedatabase -join '', '')'" } if ($ExcludeSystem) { $whereexcludesystem = " AND coalesce(object_name(st.objectid, st.dbid), '<none>') NOT LIKE 'sp_MS%' " } $duration = ";with long_queries as ( select top $Limit query_hash, sum(total_elapsed_time) elapsed_time from sys.dm_exec_query_stats where query_hash <> 0x0 group by query_hash order by sum(total_elapsed_time) desc ) select $instancecolumns coalesce(db_name(st.dbid), db_name(cast(pa.value AS INT)), 'Resource') AS [Database], coalesce(object_name(st.objectid, st.dbid), '<none>') as ObjectName, qs.query_hash as QueryHash, qs.total_elapsed_time / 1000 as TotalElapsedTimeMs, qs.execution_count as ExecutionCount, cast((total_elapsed_time / 1000) / (execution_count + 0.0) as money) as AverageDurationMs, lq.elapsed_time / 1000 as QueryTotalElapsedTimeMs, SUBSTRING(st.TEXT,(qs.statement_start_offset + 2) / 2, (CASE WHEN qs.statement_end_offset = -1 THEN LEN(CONVERT(NVARCHAR(MAX),st.text)) * 2 ELSE qs.statement_end_offset END - qs.statement_start_offset) / 2) as QueryText, qp.query_plan as QueryPlan from sys.dm_exec_query_stats qs join long_queries lq on lq.query_hash = qs.query_hash cross apply sys.dm_exec_sql_text(qs.sql_handle) st cross apply sys.dm_exec_query_plan (qs.plan_handle) qp outer apply sys.dm_exec_plan_attributes(qs.plan_handle) pa where pa.attribute = 'dbid' $wheredb $wherenotdb $whereexcludesystem order by lq.elapsed_time desc, lq.query_hash, qs.total_elapsed_time desc option (recompile)" $frequency = ";with frequent_queries as ( select top $Limit query_hash, sum(execution_count) executions from sys.dm_exec_query_stats where query_hash <> 0x0 group by query_hash order by sum(execution_count) desc ) select $instancecolumns coalesce(db_name(st.dbid), db_name(cast(pa.value AS INT)), 'Resource') AS [Database], coalesce(object_name(st.objectid, st.dbid), '<none>') as ObjectName, qs.query_hash as QueryHash, qs.execution_count as ExecutionCount, executions as QueryTotalExecutions, SUBSTRING(st.TEXT,(qs.statement_start_offset + 2) / 2, (CASE WHEN qs.statement_end_offset = -1 THEN LEN(CONVERT(NVARCHAR(MAX),st.text)) * 2 ELSE qs.statement_end_offset END - qs.statement_start_offset) / 2) as QueryText, qp.query_plan as QueryPlan from sys.dm_exec_query_stats qs join frequent_queries fq on fq.query_hash = qs.query_hash cross apply sys.dm_exec_sql_text(qs.sql_handle) st cross apply sys.dm_exec_query_plan (qs.plan_handle) qp outer apply sys.dm_exec_plan_attributes(qs.plan_handle) pa where pa.attribute = 'dbid' $wheredb $wherenotdb $whereexcludesystem order by fq.executions desc, fq.query_hash, qs.execution_count desc option (recompile)" $io = ";with high_io_queries as ( select top $Limit query_hash, sum(total_logical_reads + total_logical_writes) io from sys.dm_exec_query_stats where query_hash <> 0x0 group by query_hash order by sum(total_logical_reads + total_logical_writes) desc ) select $instancecolumns coalesce(db_name(st.dbid), db_name(cast(pa.value AS INT)), 'Resource') AS [Database], coalesce(object_name(st.objectid, st.dbid), '<none>') as ObjectName, qs.query_hash as QueryHash, qs.total_logical_reads + total_logical_writes as TotalIO, qs.execution_count as ExecutionCount, cast((total_logical_reads + total_logical_writes) / (execution_count + 0.0) as money) as AverageIO, io as QueryTotalIO, SUBSTRING(st.TEXT,(qs.statement_start_offset + 2) / 2, (CASE WHEN qs.statement_end_offset = -1 THEN LEN(CONVERT(NVARCHAR(MAX),st.text)) * 2 ELSE qs.statement_end_offset END - qs.statement_start_offset) / 2) as QueryText, qp.query_plan as QueryPlan from sys.dm_exec_query_stats qs join high_io_queries fq on fq.query_hash = qs.query_hash cross apply sys.dm_exec_sql_text(qs.sql_handle) st cross apply sys.dm_exec_query_plan (qs.plan_handle) qp outer apply sys.dm_exec_plan_attributes(qs.plan_handle) pa where pa.attribute = 'dbid' $wheredb $wherenotdb $whereexcludesystem order by fq.io desc, fq.query_hash, qs.total_logical_reads + total_logical_writes desc option (recompile)" $cpu = ";with high_cpu_queries as ( select top $Limit query_hash, sum(total_worker_time) cpuTime from sys.dm_exec_query_stats where query_hash <> 0x0 group by query_hash order by sum(total_worker_time) desc ) select $instancecolumns coalesce(db_name(st.dbid), db_name(cast(pa.value AS INT)), 'Resource') AS [Database], coalesce(object_name(st.objectid, st.dbid), '<none>') as ObjectName, qs.query_hash as QueryHash, qs.total_worker_time as CpuTime, qs.execution_count as ExecutionCount, cast(total_worker_time / (execution_count + 0.0) as money) as AverageCpuMs, cpuTime as QueryTotalCpu, SUBSTRING(st.TEXT,(qs.statement_start_offset + 2) / 2, (CASE WHEN qs.statement_end_offset = -1 THEN LEN(CONVERT(NVARCHAR(MAX),st.text)) * 2 ELSE qs.statement_end_offset END - qs.statement_start_offset) / 2) as QueryText, qp.query_plan as QueryPlan from sys.dm_exec_query_stats qs join high_cpu_queries hcq on hcq.query_hash = qs.query_hash cross apply sys.dm_exec_sql_text(qs.sql_handle) st cross apply sys.dm_exec_query_plan (qs.plan_handle) qp outer apply sys.dm_exec_plan_attributes(qs.plan_handle) pa where pa.attribute = 'dbid' $wheredb $wherenotdb $whereexcludesystem order by hcq.cpuTime desc, hcq.query_hash, qs.total_worker_time desc option (recompile)" } process { foreach ($instance in $SqlInstance) { Write-Message -Level Verbose -Message "Attempting to connect to $instance" try { $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $SqlCredential -MinimumVersion 10 } catch { Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue } if ($server.ConnectionContext.StatementTimeout -ne 0) { $server.ConnectionContext.StatementTimeout = 0 } if ($Type -in "All", "Duration") { try { Write-Message -Level Debug -Message "Executing SQL: $duration" $server.Query($duration) | Select-DefaultView -ExcludeProperty QueryPlan } catch { Stop-Function -Message "Failure executing query for duration." -ErrorRecord $_ -Target $server -Continue } } if ($Type -in "All", "Frequency") { try { Write-Message -Level Debug -Message "Executing SQL: $frequency" $server.Query($frequency) | Select-DefaultView -ExcludeProperty QueryPlan } catch { Stop-Function -Message "Failure executing query for frequency." -ErrorRecord $_ -Target $server -Continue } } if ($Type -in "All", "IO") { try { Write-Message -Level Debug -Message "Executing SQL: $io" $server.Query($io) | Select-DefaultView -ExcludeProperty QueryPlan } catch { Stop-Function -Message "Failure executing query for IO." -ErrorRecord $_ -Target $server -Continue } } if ($Type -in "All", "CPU") { try { Write-Message -Level Debug -Message "Executing SQL: $cpu" $server.Query($cpu) | Select-DefaultView -ExcludeProperty QueryPlan } catch { Stop-Function -Message "Failure executing query for CPU." -ErrorRecord $_ -Target $server -Continue } } } } } |