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Update advisor-reference-reliability-recommendations.md
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articles/advisor/advisor-reference-reliability-recommendations.md

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@@ -92,7 +92,7 @@ Learn more about [App Service Certificate - ASCDomainVerificationRequired (Domai
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## Cache
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### Availability may be impacted from high memory fragmentation. Increase fragmentation memory reservation to avoid potential impact.
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### Availability may be impacted from high memory fragmentation. Increase fragmentation memory reservation to avoid potential impact
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Fragmentation and memory pressure can cause availability incidents during a failover or management operations. Increasing reservation of memory for fragmentation helps in reducing the cache failures when running under high memory pressure. Memory for fragmentation can be increased via maxfragmentationmemory-reserved setting available in advanced settings blade.
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Learn more about [Availability set - ManagedDisksAvSet (Use Managed Disks to improve data reliability)](https://aka.ms/aa_avset_manageddisk_learnmore).
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### Check Point Virtual Machine may lose Network Connectivity.
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### Check Point Virtual Machine may lose Network Connectivity
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We have identified that your Virtual Machine might be running a version of Check Point image that has been known to lose network connectivity in the event of a platform servicing operation. We recommend that you upgrade to a newer version of the image. Contact Check Point for further instructions on how to upgrade your image.
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Learn more about [Availability set - ManagedDisksAvSet (Use Managed Disks to improve data reliability)](https://aka.ms/aa_avset_manageddisk_learnmore).
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### Access to mandatory URLs missing for your Windows Virtual Desktop environment
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### Access to mandatory URLs missing for your Azure Virtual Desktop environment
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In order for a session host to deploy and register to Windows Virtual Desktop properly, you need to add a set of URLs to the allowed list, in case your virtual machine runs in a restricted environment. After visiting the "Learn More" link, you see the minimum list of URLs you need to unblock to have a successful deployment and functional session host. For specific URL(s) missing from allowed list, you may also search Application event log for event 3702.
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In order for a session host to deploy and register to Azure Virtual Desktop properly, you need to add a set of URLs to the allowed list, in case your virtual machine runs in a restricted environment. After visiting the "Learn More" link, you see the minimum list of URLs you need to unblock to have a successful deployment and functional session host. For specific URL(s) missing from allowed list, you may also search Application event log for event 3702.
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Learn more about [Virtual machine - SessionHostNeedsAssistanceForUrlCheck (Access to mandatory URLs missing for your Azure Virtual Desktop environment)](../virtual-desktop/safe-url-list.md).
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## Container Service
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### Upgrade to Standard tier for mission-critical and production clusters
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This cluster has more than 10 nodes and has not enabled the Standard tier. The Kubernetes Control Plane on the Free tier comes with limited resources and is not intended for production use or any cluster with 10 or more nodes.
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Learn more about [Kubernetes service - UseStandardpricingtier (Upgrade to Standard tier for mission-critical and production clusters)](/azure/aks/uptime-sla).
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### Clusters having node pools using non-recommended B-Series
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Cluster has one or more node pools using a non-recommended burstable VM SKU. With burstable VMs, full vCPU capability 100% is unguaranteed. Please make sure B-series VM's are not used in Production environment.
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Learn more about [Kubernetes service - ClustersUsingBSeriesVMs (Clusters having node pools using non-recommended B-Series)](/azure/virtual-machines/sizes-b-series-burstable).
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## Data Lake Storage
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### You have ADLS Gen1 Accounts Which Need to be Migrated to ADLS Gen2
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As previously announced, Azure Data Lake Storage Gen1 will be retired on February 29, 2024. We highly recommend migrating your data lake to Azure Data Lake Storage Gen2, which offers advanced capabilities specifically designed for big data analytics and is built on top of Azure Blob Storage.
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Learn more about [Data lake store account - ADLSGen1_Deprecation (You have ADLS Gen1 Accounts Which Needs to be Migrated to ADLS Gen2)](/azure/updates/action-required-switch-to-azure-data-lake-storage-gen2-by-29-february-2024/).
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## MySQL
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### Replication - Add a primary key to the table that currently does not have one
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Learn more about [Azure Database for MySQL flexible server - MySqlFlexibleServerReplicaMissingPKfb41 (Replication - Add a primary key to the table that currently does not have one)](/azure/mysql/how-to-troubleshoot-replication-latency#no-primary-key-or-unique-key-on-a-table).
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### High Availability - Add primary key to the table that currently does not have one.
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### High Availability - Add primary key to the table that currently does not have one
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Our internal monitoring system has identified significant replication lag on the High Availability standby server. This lag is primarily caused by the standby server replaying relay logs on a table that lacks a primary key. To address this issue and adhere to best practices, it is recommended to add primary keys to all tables. Once this is done, proceed to disable and then re-enable High Availability to mitigate the problem.
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## Kubernetes
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### Upgrade to Standard tier for mission-critical and production clusters
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This cluster has more than 10 nodes and has not enabled the Standard tier. The Kubernetes Control Plane on the Free tier comes with limited resources and is not intended for production use or any cluster with 10 or more nodes.
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Learn more about [Kubernetes service - UseStandardpricingtier (Upgrade to Standard tier for mission-critical and production clusters)](/azure/aks/uptime-sla).
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### Pod Disruption Budgets Recommended
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Pod Disruption Budgets Recommended. Improve service high availability.
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## Media Services
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### Increase Media Services quotas or limits to ensure continuity of service.
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### Increase Media Services quotas or limits to ensure continuity of service
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Your media account is about to hit its quota limits. Review current usage of Assets, Content Key Policies and Stream Policies for the media account. To avoid any disruption of service, you should request quota limits to be increased for the entities that are closer to hitting quota limit. You can request quota limits to be increased by opening a ticket and adding relevant details to it. Don't create additional Azure Media accounts in an attempt to obtain higher limits.
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## Search
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### You are close to exceeding storage quota of 2GB. Create a Standard search service.
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### You are close to exceeding storage quota of 2GB. Create a Standard search service
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You're close to exceeding storage quota of 2GB. Create a Standard search service. Indexing operations stop working when storage quota is exceeded.
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Learn more about [Service limits in Azure Cognitive Search](/azure/search/search-limits-quotas-capacity).
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### You are close to exceeding storage quota of 50MB. Create a Basic or Standard search service.
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### You are close to exceeding storage quota of 50MB. Create a Basic or Standard search service
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You're close to exceeding storage quota of 50MB. Create a Basic or Standard search service. Indexing operations stop working when storage quota is exceeded.
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Learn more about [Service limits in Azure Cognitive Search](/azure/search/search-limits-quotas-capacity).
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### You are close to exceeding your available storage quota. Add additional partitions if you need more storage.
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### You are close to exceeding your available storage quota. Add additional partitions if you need more storage
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you're close to exceeding your available storage quota. Add additional partitions if you need more storage. After exceeding storage quota, you can still query, but indexing operations no longer work.
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Learn more about [Service limits in Azure Cognitive Search](/azure/search/search-limits-quotas-capacity).
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## Storage
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### You have ADLS Gen1 Accounts Which Need to be Migrated to ADLS Gen2
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As previously announced, Azure Data Lake Storage Gen1 will be retired on February 29, 2024. We highly recommend migrating your data lake to Azure Data Lake Storage Gen2, which offers advanced capabilities specifically designed for big data analytics and is built on top of Azure Blob Storage.
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Learn more about [Data lake store account - ADLSGen1_Deprecation (You have ADLS Gen1 Accounts Which Needs to be Migrated to ADLS Gen2)](/azure/action-required-switch-to-azure-data-lake-storage-gen2-by-29-february-2024/).
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### Enable Soft Delete to protect your blob data
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After enabling Soft Delete, deleted data transitions to a soft deleted state instead of being permanently deleted. When data is overwritten, a soft deleted snapshot is generated to save the state of the overwritten data. You can configure the amount of time soft deleted data is recoverable before it permanently expires.
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Learn more about [App service - AppServiceStandardOrHigher (Move your App Service resource to Standard or higher and use deployment slots)](https://aka.ms/ant-staging).
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### Consider scaling out your App Service Plan to optimize user experience and availability.
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### Consider scaling out your App Service Plan to optimize user experience and availability
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Consider scaling out your App Service Plan to at least two instances to avoid cold start delays and service interruptions during routine maintenance.
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Learn more about [App Service plan - AppServiceNumberOfInstances (Consider scaling out your App Service Plan to optimize user experience and availability.)](https://aka.ms/appsvcnuminstances).
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### Consider upgrading the hosting plan of the Static Web App(s) in this subscription to Standard SKU.
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### Consider upgrading the hosting plan of the Static Web App(s) in this subscription to Standard SKU
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The combined bandwidth used by all the Free SKU Static Web Apps in this subscription is exceeding the monthly limit of 100GB. Consider upgrading these apps to Standard SKU to avoid throttling.
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