Update maintenance-scheduling.md

Update maintenance-scheduling

Author: dialmoth

articles/synapse-analytics/sql-data-warehouse/maintenance-scheduling.md

@@ -21,7 +21,7 @@ For example, you can schedule a primary window of Saturday 22:00 to Sunday 01:00
 
 All newly created data warehouse instances will have a system-defined maintenance schedule applied during deployment. The schedule can be edited as soon as deployment is complete.
 
-The duration of a maintenance window can range from three (3) to eight (8) hours, with a minimum requirement of three (3) hours. However, it is important to keep in mind that maintenance tasks typically take less than 30 minutes to complete, but it may take longer in some cases. For example, if there are active transactions when the maintenance starts, they will be aborted and rolled back, which may cause delays in coming back online. To avoid this scenario, we recommend that you ensure that no long-running transactions are active during the start of your maintenance window.
+When choosing a maintenance window, you need to select a start time and set a maximum duration. The "maximum duration of a maintenance window" determines the timeframe in which maintenance tasks will be carried out. This timeframe can be between three (3) and eight (8) hours, with a minimum requirement of three (3) hours. During this period, your data warehouse will be temporarily offline as your dedicated pool is moved to upgraded capacity using a process similar to pause/resume. Under typical conditions, this operation will complete in well under 30 minutes, but it's important to note that in some cases, it can take longer. For instance, if there are active transactions when the maintenance begins, they will be canceled and rolled back, potentially causing delays in restoring the online service. To prevent this situation, we recommend ensuring that there are no long-running transactions active at the start of your maintenance window.
 
 All maintenance operations should finish within the specified maintenance windows unless we are required to deploy a time sensitive update. If your data warehouse is paused during a scheduled maintenance, it will be updated during the resume operation. You'll be notified immediately after your data warehouse maintenance is completed.