Added readable replicas in MI

Author: jovanpop-msft

articles/sql-database/sql-database-managed-instance-resource-limits.md

@@ -10,7 +10,7 @@ ms.topic: conceptual
 author: bonova
 ms.author: bonova
 ms.reviewer: carlrab, jovanpop, sachinp, sstein
-ms.date: 06/26/2019
+ms.date: 08/27/2019
 ---
 # Overview Azure SQL Database managed instance resource limits
 
@@ -45,7 +45,7 @@ Managed instance has two service tiers: General Purpose and Business Critical. T
 
 | **Feature** | **General Purpose** | **Business Critical** |
 | --- | --- | --- |
-| Number of vCores\* | Gen4: 8, 16, 24<br/>Gen5: 4, 8, 16, 24, 32, 40, 64, 80 | Gen4: 8, 16, 24, 32 <br/> Gen5: 4, 8, 16, 24, 32, 40, 64, 80 |
+| Number of vCores\* | Gen4: 8, 16, 24<br/>Gen5: 4, 8, 16, 24, 32, 40, 64, 80 | Gen4: 8, 16, 24 <br/> Gen5: 4, 8, 16, 24, 32, 40, 64, 80 |
 | Max memory | Gen4: 56 GB - 168 GB (7GB/vCore)<br/>Gen5: 40.8 GB - 408 GB (5.1GB/vCore)<br/>Add more vCores to get more memory. | Gen4: 56 GB - 168 GB (7GB/vCore)<br/>Gen5: 40.8 GB - 408 GB (5.1GB/vCore)<br/>Add more vCores to get more memory. |
 | Max instance reserved storage size | - 2 TB for 4 vCores (Gen5 only)<br/>- 8 TB for other sizes | Gen4: 1 TB <br/> Gen5: <br/>- 1 TB for 4, 8, 16 vCores<br/>- 2 TB for 24 vCores<br/>- 4 TB for 32, 40, 64, 80 vCores |
 | Max database size | Determined by the max storage size per instance | Determined by the max storage size per instance |
@@ -59,10 +59,12 @@ Managed instance has two service tiers: General Purpose and Business Critical. T
 | Max tempDB size | 192 - 1,920 GB (24 GB per vCore)<br/>Add more vCores to get more TempDB space. | Limited by the max instance storage size. TempDB log file size is currently limited to 24GB/vCore. |
 | In-memory OLTP | Not supported | Available |
 | Max sessions | 30000 | 30000 |
+| Readable replicas | 0 | 1 |
 
 > [!NOTE]
 > - Both data and log file size in the user and system databases are included in the instance storage size that is compared with the Max storage size limit. Use <a href="https://docs.microsoft.com/sql/relational-databases/system-catalog-views/sys-master-files-transact-sql">sys.master_files</a> system view to determine the total used space by databases. Error logs are not persisted and not included in the size. Backups are not included in storage size.
 > - Throughput and IOPS also depend on the page size that is not explicitly limited by managed instance.
+> You can create another readable replica in different Azure region using Auto-failover groups.
 
 ## Supported regions