Log Analytics new log search FAQ and known issues

This article includes frequently asked questions and known issues regarding the upgrade of Log Analytics to the new query language. You should read through this entire article before making the decision to upgrade your workspace.


Question: I have a lot of alert rules. Do I need to create them again in the new language after I upgrade?

No, your alert rules are automatically converted to the new search language during upgrade.

Question: I have alert rules with webhook and runbook actions. Will these continue to work when I upgrade?

No, there are some changes in the webhook and runbook actions that might require you to make changes on how you process the payload. We’ve made these changes to standardize the various output formats and reduce the size of the payload. Details on these formats are in Add actions to alert rules in Log Analytics.

Computer groups

Question: I'm getting errors when trying to use computer groups. Has their syntax changed?

Yes, the syntax for using computer groups changes when your workspace is upgraded. See Computer groups in Log Analytics log searches for details.


Question: Can I still use dashboards in an upgraded workspace?

With the upgrade, we are beginning the process of depracating My Dashboard. You can continue to use any tiles that you added to the dashboard before your workspace was upgraded, but you cannot edit those tiles or add new ones. You can continue to create and edit views with View Designer, which has a richer feature set, and also create dashboards in the Azure portal.

Log searches

Question: I have saved searches outside of my upgraded workspace. Can I convert them to the new search language automatically?

You can use the language converter tool in the log search page to convert each one. There is no method to automatically convert multiple searches without upgrading the workspace.

Question: Why are my query results not sorted?

Results are not sorted by default in the new query language. Use the sort operator to sort your results by one or more properties.

Question: Where did the metrics view go after I upgraded?

The metrics view gave a graphical representation of performance data from a log search. This view is no longer available after upgrade. You can use the render operator to format output from a query in a timechart.

Question: Where did minify go after I upgraded?

Minify is a feature that gives a summarized view of your search results. After you upgrade, the Minify option no longer appears in the Log Search portal. You can get similar functionality with the new search language using reduce or autocluster_v2.

| where TimeGenerated > ago(10h)
| reduce by RenderedDescription

| where TimeGenerated > ago(10h)
| evaluate autocluster_v2()

Log Search API

Question: Does the Log Search API get updated after I upgrade?

The legacy Log Search API will no longer work when you upgraded your workspace. See Azure Log Analytics REST API for details on the new API.


Question: Should I use the new Advanced Analytics portal or keep using the Log Search portal?

You can see a comparison of the two portals at Portals for creating and editing log queries in Azure Log Analytics. Each has distinct advantages so you can choose the best one for your requirements. It's common to write queries in the Advanced Analytics portal and paste them into other places such as View Designer. You should read about issues to consider when doing that.

Question: After upgrade, I get an error trying to run queries and am also seeing errors in my views.

Your browser requires access to the following addresses to run Log Analytics queries after upgrade. If your browser is accessing the Azure portal through a firewall, you must enable access to these addresses.

Uri IP Ports
portal.loganalytics.io Dynamic 80,443
api.loganalytics.io Dynamic 80,443
docs.loganalytics.io Dynamic 80,443

Power BI

Question: Does anything change with PowerBI integration?

Yes. Once your workspace has been upgraded then the process for exporting Log Analytics data to Power BI will no longer work. Any existing schedules that you created before upgrading will become disabled.

After upgrade, Azure Log Analytics uses the same platform as Application Insights, and you use the same process to export Log Analytics queries to Power BI as the process to export Application Insights queries to Power BI. Export to Power BI now calls directly the API endpoint. This allows you to get up to 500,000 rows or 64,000,000 bytes of data, export long queries and customize the timeout of the query (default timeout is 3 minutes, and the maximum timeout is 10 minutes).

PowerShell cmdlets

Question: Does the Log Search PowerShell cmdlet get updated after I upgrade?

The Get-AzureRmOperationalInsightsSearchResults will be deprecated when the upgrade of all workspaces is complete. Use the Invoke-LogAnalyticsQuery cmdlet to perform log searches in upgraded workspaces.

Resource Manager templates

Question: Can I create an upgraded workspace with a Resource Manager template?

Yes. You must use an API version of 2017-03-15-preview and include a features section in your template as in the following example.

"resources": [
        "type": "Microsoft.OperationalInsights/workspaces",
        "apiVersion": "2017-03-15-preview",
        "name": "[parameters('workspaceName')]",
        "location": "[parameters('workspaceRegion')]",
        "properties": {
            "sku": {
                "name": "Free"
            "features": {
                "legacy": 0,
                "searchVersion": 1


Question: Will my solutions continue to work?

All solutions will continue to work in an upgraded workspace, although their performance will improve if they are converted to the new query language. There are known issues with some existing solutions that are described in this section.

Known issue: Perspectives in Application Insights connector

Perspectives in Application Insights Connector solution are no longer supported in the Application Insights connector solution. You can use View Designer to create custom views with Application Insights data.

Known issue: Backup solution

The Backup Solution may not collect data if was installed before upgrading a workspace. Uninstall the solution and then install the latest version. The new version of the solution does not support classic Backup vaults, so you must also upgrade to Recovery Services vaults to continue to use the solution.

Upgrade process

Question: I have several workspaces. Can I upgrade all workspaces at the same time?

No. Upgrade applies to a single workspace each time. Currently there is no way of upgrading many workspaces at once. Please note that other users of the upgraded workspace will be affected as well.

Question: Will existing log data collected in my workspace be modified if I upgrade?

No. The log data available to your workspace searches is not affected by the upgrade. Saved searches, alerts and views will be converted to the new search language automatically.

Question: What happens if I don't upgrade my workspace?

The legacy log search will be deprecated in the coming months. Workspaces that are not upgraded by that time will be upgraded automatically.

Question: Can I revert back after I upgrade?

Prior to general availability, you could revert your workspace after upgrading. Now that the new language has reached general availability, this capability has been removed as we start to retire the legacy platform.


Question: How do I create a new view with View Designer?

Prior to upgrade, you could create a new view with View Designer from a tile on the main dashboard in the OMS portal. When your workspace is upgraded, this tile is removed. You can create a new view with View Designer in the OMS portal by clicking on the green + button in the left menu. You continue to create a new view with the Azure portal by clicking the View Designer tile.

Next steps