.show commands command
.show commands returns a table with completed management commands. These commands are available to query for 30 days.
Note
This command is useful for investigating performance issues, as it shows the resources consumed by each management command. See Examples.
Permissions
A database admin or database monitor can see any command that was invoked on their database. Other users can only see their commands.
Syntax
.show commands
Returns
The return table has two columns with resources consumption details of every completed command.
TotalCpu- The total CPU clock time (User mode + Kernel mode) consumed by this command.ResourceUtilization- Contains all resource use information related to that command, including the TotalCpu.
Resource consumption that is tracked includes data updates, and any query associated with the current admin command.
Currently, only some of the management commands are covered by the commands table (.ingest, .set, .append, .set-or-replace, .set-or-append). Gradually, more commands are added to the commands table.
Example output
| ClientActivityId | CommandType | Text | Database | StartedOn | LastUpdatedOn | Duration | State | RootActivityId | User | FailureReason | Application | Principal | TotalCpu | ResourceUtilization | WorkloadGroup |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KD2RunCommand;a069f9e3-6062-4a0e-aa82-75a1b5e16fb4 | ExtentsMerge | .merge async Operations ... | DB1 | 2017-09-05 11:08:07.5738569 | 2017-09-05 11:08:09.1051161 | 00:00:01.5312592 | Completed | b965d809-3f3e-4f44-bd2b-5e1f49ac46c5 | AAD app ID=5ba8cec2-9a70-e92c98cad651 | Kusto.Azure.DM.Svc | aadapp=5ba8cec2-9a70-e92c98cad651 | 00:00:03.5781250 | { "ScannedExtentsStatistics": { "MinDataScannedTime": null, "MaxDataScannedTime": null }, "CacheStatistics": { Memory": { "Misses": 2, "Hits": 20 }, "Disk": { "Misses": 2, "Hits": 0 } }, "MemoryPeak": 159620640, "TotalCpu": "00:00:03.5781250" } | internal | |
| KE.RunCommand; 710e08ca-2cd3-4d2d-b7bd-2738d335aa50 | DataIngestPull | .ingest into MyTableName ... | TestDB | 2017-09-04 16:00:37.0915452 | 2017-09-04 16:04:37.2834555 | 00:04:00.1919103 | Failed | a8986e9e-943f-81b0270d6fae4 | cooper@fabrikam.com | The socket connection has been disposed. | Kusto.Explorer | aaduser=... | 00:00:00 | { "ScannedExtentsStatistics": { "MinDataScannedTime": null, "MaxDataScannedTime": null }, "CacheStatistics": { "Memory": { "Misses": 0, Hits": 0 }, "Disk": { "Misses": 0, "Hits": 0 } }, "MemoryPeak": 0, "TotalCpu": "00:00:00"} | default |
| KD2RunCommand;97db47e6-93e2-4306-8b7d-670f2c3307ff | ExtentsRebuild | .merge async Operations ... | DB2 | 2017-09-18 13:29:38.5945531 | 2017-09-18 13:29:39.9451163 | 00:00:01.3505632 | Completed | d5ebb755-d5df-4e94-b240-9accdf06c2d1 | AAD app ID=5ba8cec2-9a70-e92c98cad651 | Kusto.Azure.DM.Svc | aadapp=5ba8cec2-9a70-e92c98cad651 | 00:00:00.8906250 | { "ScannedExtentsStatistics": { "MinDataScannedTime": null, "MaxDataScannedTime": null }, "CacheStatistics": { Memory": { "Misses": 0, "Hits": 1 }, "Disk": { "Misses": 0, "Hits": 0 } }, "MemoryPeak": 88828560, "TotalCpu": "00:00:00.8906250"} | internal |
Examples
Extract data from the ResourceUtilization column
To access one of the properties within the ResourceUtilization column, call on ResourcesUtilization.PropertyName.
Note
ResourceUtilization is a dynamic column. To work with its values, you should first convert it into a specific data type. Use a conversion function such as tolong, toint, totimespan.
For example:
.show commands
| where CommandType == "TableAppend"
| where StartedOn > ago(1h)
| extend MemoryPeak = tolong(ResourcesUtilization.MemoryPeak)
| top 3 by MemoryPeak desc
| project StartedOn, MemoryPeak, TotalCpu, Text
Output
| StartedOn | MemoryPeak | TotalCpu | Text |
|---|---|---|---|
| 2017-09-28 12:11:27.8155381 | 800396032 | 00:00:04.5312500 | .append Server_Boots <| let bootStartsSourceTable = SessionStarts; ... |
| 2017-09-28 11:21:26.7304547 | 750063056 | 00:00:03.8218750 | .set-or-append WebUsage <| database('CuratedDB').WebUsage_v2 | summarize ... | project ... |
| 2017-09-28 12:16:17.4762522 | 676289120 | 00:00:00.0625000 | .set-or-append AtlasClusterEventStats with(...) <| Atlas_Temp(datetime(2017-09-28 12:13:28.7621737), datetime(2017-09-28 12:14:28.8168492)) |
Query the TotalCpu column
Top 10 CPU consuming queries in the last day.
.show commands
| where StartedOn > ago(1d)
| top 10 by TotalCpu
| project StartedOn, CommandType, ClientActivityId, TotalCpu
All queries in the last 10 hours whose TotalCpu passed 3 minutes.
.show commands
| where StartedOn > ago(10h) and TotalCpu > 3m
| project StartedOn, CommandType, ClientActivityId, TotalCpu
| order by TotalCpu
All queries in the last 24 hours whose TotalCpu passed 5 minutes, grouped by User and Principal.
.show commands
| where StartedOn > ago(24h)
| summarize TotalCount=count(), CountAboveThreshold=countif(TotalCpu > 2m), AverageCpu = avg(TotalCpu), MaxTotalCpu=max(TotalCpu), (50th_Percentile_TotalCpu, 95th_Percentile_TotalCpu)=percentiles(TotalCpu, 50, 95) by User, Principal
| extend PercentageAboveThreshold = strcat(substring(CountAboveThreshold * 100 / TotalCount, 0, 5), "%")
| order by CountAboveThreshold desc
| project User, Principal, CountAboveThreshold, TotalCount, PercentageAboveThreshold, MaxTotalCpu, AverageCpu, 50th_Percentile_TotalCpu, 95th_Percentile_TotalCpu
Timechart: Average CPU vs 95th Percentile vs Max CPU.
.show commands
| where StartedOn > ago(1d)
| summarize MaxCpu_Minutes=max(TotalCpu)/1m, 95th_Percentile_TotalCpu_Minutes=percentile(TotalCpu, 95)/1m, AverageCpu_Minutes=avg(TotalCpu)/1m by bin(StartedOn, 1m)
| render timechart
Query the MemoryPeak column
Top 10 queries in the last day with the highest MemoryPeak values.
.show commands
| where StartedOn > ago(1d)
| extend MemoryPeak = tolong(ResourcesUtilization.MemoryPeak)
| project StartedOn, CommandType, ClientActivityId, TotalCpu, MemoryPeak
| top 10 by MemoryPeak
Timechart of Average MemoryPeak vs 95th Percentile vs Max MemoryPeak.
.show commands
| where StartedOn > ago(1d)
| project MemoryPeak = tolong(ResourcesUtilization.MemoryPeak), StartedOn
| summarize Max_MemoryPeak=max(MemoryPeak), 95th_Percentile_MemoryPeak=percentile(MemoryPeak, 95), Average_MemoryPeak=avg(MemoryPeak) by bin(StartedOn, 1m)
| render timechart