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articles/azure-monitor/vm/monitor-virtual-machine-data-collection.md

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@@ -90,27 +90,27 @@ For more granular filtering by criteria such as event ID, you can create a custo
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Use the following guidance as a recommended starting point for event collection. Modify the DCR settings to filter unneeded events and add other events depending on your requirements.
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| Source | Strategy |
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|:---|:---|
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|--------|----------|
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| Windows events | Collect at least **Critical**, **Error**, and **Warning** events for the **System** and **Application** logs to support alerting. Add **Information** events to analyze trends and support troubleshooting. **Verbose** events are rarely useful and typically shouldn't be collected. |
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| Syslog events | Collect at least **LOG_WARNING** events for each facility to support alerting. Add **Information** events to analyze trends and support troubleshooting. **LOG_DEBUG** events are rarely useful and typically shouldn't be collected. |
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### Sample log queries: Windows events
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| Query | Description |
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|:---|:---|
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| Event | All Windows events |
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| Event | where EventLevelName == "Error"` |All Windows events with severity of error |
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| Event | summarize count() by Source` |Count of Windows events by source |
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| Event | where EventLevelName == "Error" | summarize count() by Source` |Count of Windows error events by source |
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| Query | Description |
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|---------|-------------|
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| `Event` | All Windows events |
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| `Event` | where EventLevelName == "Error"` |All Windows events with severity of error |
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| `Event` | summarize count() by Source` |Count of Windows events by source |
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| `Event` | where EventLevelName == "Error" | summarize count() by Source` |Count of Windows error events by source |
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### Sample log queries: Syslog events
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| Query | Description |
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|:--- |:--- |
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| Syslog |All Syslogs |
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| Syslog | where SeverityLevel == "error"` |All Syslog records with severity of error |
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| Syslog | summarize AggregatedValue = count() by Computer` |Count of Syslog records by computer |
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| Syslog | summarize AggregatedValue = count() by Facility` |Count of Syslog records by facility |
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| Query | Description |
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|----------|-------------|
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| `Syslog` |All Syslogs |
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| `Syslog` | where SeverityLevel == "error"` |All Syslog records with severity of error |
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| `Syslog` | summarize AggregatedValue = count() by Computer` |Count of Syslog records by computer |
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| `Syslog` | summarize AggregatedValue = count() by Facility` |Count of Syslog records by facility |
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## Collect performance counters
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Performance data from the client can be sent to either [Azure Monitor Metrics](../essentials/data-platform-metrics.md) or [Azure Monitor Logs](../logs/data-platform-logs.md), and you typically send them to both destinations. If you enabled VM insights, a common set of performance counters is collected in Logs to support its performance charts. You can't modify this set of counters, but you can create other DCRs to collect more counters and send them to different destinations.
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> You might choose to combine performance and event collection in the same DCR.
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Destination | Description |
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|:---|:---|
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| Metrics | Host metrics are automatically sent to Azure Monitor Metrics. You can use a DCR to collect client metrics so that they can be analyzed together with [metrics explorer](../essentials/metrics-getting-started.md) or used with [metrics alerts](../alerts/alerts-create-new-alert-rule.md?tabs=metric). This data is stored for 93 days. |
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|------------|-------------|
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| Metrics | Host metrics are automatically sent to Azure Monitor Metrics. You can use a DCR to collect client metrics so that they can be analyzed together with [metrics explorer](../essentials/metrics-getting-started.md) or used with [metrics alerts](../alerts/alerts-create-new-alert-rule.md?tabs=metric). This data is stored for 93 days. |
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| Logs | Performance data stored in Azure Monitor Logs can be stored for extended periods. The data can be analyzed along with your event data by using [log queries](../logs/log-query-overview.md) with [Log Analytics](../logs/log-analytics-overview.md) or [log query alerts](../alerts/alerts-create-new-alert-rule.md?tabs=log). You can also correlate data by using complex logic across multiple machines, regions, and subscriptions.<br><br>Performance data is sent to the following tables:<br>VM insights - [InsightsMetrics](/azure/azure-monitor/reference/tables/insightsmetrics)<br>Other performance data - [Perf](/azure/azure-monitor/reference/tables/perf) |
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### Sample log queries
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The following samples use the `Perf` table with custom performance data. For information on performance data collected by VM insights, see [How to query logs from VM insights](../vm/vminsights-log-query.md#performance-records).
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| Query | Description |
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|:--- |:---|
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| Perf | All Performance data |
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| Perf | where Computer == "MyComputer"` |All Performance data from a particular computer |
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| Perf | where CounterName == "Current Disk Queue Length"` |All Performance data for a particular counter |
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| Perf | where ObjectName == "Processor" and CounterName == "% Processor Time" and InstanceName == "_Total" | summarize AVGCPU = avg(CounterValue) by Computer` |Average CPU Utilization across all computers |
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| Perf | where CounterName == "% Processor Time" | summarize AggregatedValue = max(CounterValue) by Computer` |Maximum CPU Utilization across all computers |
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| Perf | where ObjectName == "LogicalDisk" and CounterName == "Current Disk Queue Length" and Computer == "MyComputerName" | summarize AggregatedValue = avg(CounterValue) by InstanceName` |Average Current Disk Queue length across all the instances of a given computer |
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| Perf | where CounterName == "Disk Transfers/sec" | summarize AggregatedValue = percentile(CounterValue, 95) by Computer` |95th Percentile of Disk Transfers/Sec across all computers |
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| Perf | where CounterName == "% Processor Time" and InstanceName == "_Total" | summarize AggregatedValue = avg(CounterValue) by bin(TimeGenerated, 1h), Computer` |Hourly average of CPU usage across all computers |
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| Perf | where Computer == "MyComputer" and CounterName startswith_cs "%" and InstanceName == "_Total" | summarize AggregatedValue = percentile(CounterValue, 70) by bin(TimeGenerated, 1h), CounterName` | Hourly 70 percentile of every % percent counter for a particular computer |
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| Perf | where CounterName == "% Processor Time" and InstanceName == "_Total" and Computer == "MyComputer" | summarize ["min(CounterValue)"] = min(CounterValue), ["avg(CounterValue)"] = avg(CounterValue), ["percentile75(CounterValue)"] = percentile(CounterValue, 75), ["max(CounterValue)"] = max(CounterValue) by bin(TimeGenerated, 1h), Computer` |Hourly average, minimum, maximum, and 75-percentile CPU usage for a specific computer |
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| Perf | where ObjectName == "MSSQL$INST2:Databases" and InstanceName == "master"` | All Performance data from the Database performance object for the master database from the named SQL Server instance INST2. |
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| Query | Description |
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|--------|-------------|
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| `Perf` | All Performance data |
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| `Perf` | where Computer == "MyComputer"` |All Performance data from a particular computer |
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| `Perf` | where CounterName == "Current Disk Queue Length"` |All Performance data for a particular counter |
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|` Perf` | where ObjectName == "Processor" and CounterName == "% Processor Time" and InstanceName == "_Total" | summarize AVGCPU = avg(CounterValue) by Computer` |Average CPU Utilization across all computers |
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| `Perf` | where CounterName == "% Processor Time" | summarize AggregatedValue = max(CounterValue) by Computer` |Maximum CPU Utilization across all computers |
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| `Perf` | where ObjectName == "LogicalDisk" and CounterName == "Current Disk Queue Length" and Computer == "MyComputerName" | summarize AggregatedValue = avg(CounterValue) by InstanceName` |Average Current Disk Queue length across all the instances of a given computer |
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| `Perf` | where CounterName == "Disk Transfers/sec" | summarize AggregatedValue = percentile(CounterValue, 95) by Computer` |95th Percentile of Disk Transfers/Sec across all computers |
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| `Perf` | where CounterName == "% Processor Time" and InstanceName == "_Total" | summarize AggregatedValue = avg(CounterValue) by bin(TimeGenerated, 1h), Computer` |Hourly average of CPU usage across all computers |
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| `Perf` | where Computer == "MyComputer" and CounterName startswith_cs "%" and InstanceName == "_Total" | summarize AggregatedValue = percentile(CounterValue, 70) by bin(TimeGenerated, 1h), CounterName` | Hourly 70 percentile of every % percent counter for a particular computer |
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| `Perf` | where CounterName == "% Processor Time" and InstanceName == "_Total" and Computer == "MyComputer" | summarize ["min(CounterValue)"] = min(CounterValue), ["avg(CounterValue)"] = avg(CounterValue), ["percentile75(CounterValue)"] = percentile(CounterValue, 75), ["max(CounterValue)"] = max(CounterValue) by bin(TimeGenerated, 1h), Computer` |Hourly average, minimum, maximum, and 75-percentile CPU usage for a specific computer |
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| `Perf` | where ObjectName == "MSSQL$INST2:Databases" and InstanceName == "master"` | All Performance data from the Database performance object for the master database from the named SQL Server instance INST2. |
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## Collect text logs
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Some applications write events written to a text log stored on the virtual machine. Create a [custom table and DCR](../agents/data-collection-text-log.md) to collect this data. You define the location of the text log, its detailed configuration, and the schema of the custom table. There's a cost for the ingestion and retention of this data in the workspace.
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### Sample log queries
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The column names used here are examples only. The column names for your log will most likely be different.
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| Query | Description |
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|:--- |:--- |
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| MyApp_CL | summarize count() by code` | Count the number of events by code. |
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| MyApp_CL | where status == "Error" | summarize AggregatedValue = count() by Computer, bin(TimeGenerated, 15m)` | Create an alert rule on any error event. |
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| Query | Description |
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|------------|-------------|
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| `MyApp_CL` | summarize count() by code` | Count the number of events by code. |
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| `MyApp_CL` | where status == "Error" | summarize AggregatedValue = count() by Computer, bin(TimeGenerated, 15m)` | Create an alert rule on any error event. |
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## Collect IIS logs
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IIS running on Windows machines writes logs to a text file. Configure IIS log collection by using [Collect IIS logs with Azure Monitor Agent](../agents/data-collection-iis.md). There's a cost for the ingestion and retention of this data in the workspace.
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### Sample log queries
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| Query | Description |
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|:--- |:--- |
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| W3CIISLog | where csHost=="www.contoso.com" | summarize count() by csUriStem` | Count the IIS log entries by URL for the host www.contoso.com. |
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| W3CIISLog | summarize sum(csBytes) by Computer` | Review the total bytes received by each IIS machine. |
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| Query | Description |
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|-------------|-------------|
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| `W3CIISLog` | where csHost=="www.contoso.com" | summarize count() by csUriStem` | Count the IIS log entries by URL for the host www.contoso.com. |
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| `W3CIISLog` | summarize sum(csBytes) by Computer` | Review the total bytes received by each IIS machine. |
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## Monitor a service or daemon
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To monitor the status of a Windows service or Linux daemon, enable the [Change Tracking and Inventory](../../automation/change-tracking/overview.md) solution in [Azure Automation](../../automation/automation-intro.md).
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When you enable Change Tracking and Inventory, two new tables are created in your Log Analytics workspace. Use these tables for logs queries and log query alert rules.
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| Table | Description |
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|-------|-------------|
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| [ConfigurationChange](/azure/azure-monitor/reference/tables/configurationdata) | Changes to in-guest configuration data |
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| [ConfigurationData](/azure/azure-monitor/reference/tables/configurationdata) | Last reported state for in-guest configuration data |
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articles/azure-monitor/vm/vminsights-enable-policy.md

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The initiatives apply to new machines you create and machines you modify, but not to existing VMs.
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|Name |Description |
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|-----|------------|
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| Enable Azure Monitor for VMs with Azure Monitoring Agent | Installs Azure Monitor Agent and the Dependency agent on Azure VMs. |
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| Enable Azure Monitor for virtual machine scale sets with Azure Monitoring Agent | Installs Azure Monitor Agent and the Dependency agent on virtual machine scale sets. |
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| Enable Azure Monitor for Hybrid VMs with Azure Monitoring Agent | Installs Azure Monitor Agent and Dependency agent on hybrid VMs connected with Azure Arc. |

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