updates

Author: GennadNY

articles/postgresql/flexible-server/concepts-compare-single-server-flexible-server.md

@@ -113,7 +113,7 @@ The following table provides a list of high-level features and capabilities comp
 | Microsoft Defender for Cloud | Yes | No |
 | Resource health | Yes | Yes |
 | Service health | Yes | Yes |
-| Performance insights (iPerf) | Yes | Yes |
+| Performance insights (iPerf) | Yes | Yes. Not available in portal |
 | Major version upgrades support | No | No |
 | Minor version upgrades | Yes. Automatic during maintenance window | Yes. Automatic during maintenance window |
 

articles/postgresql/single-server/how-to-optimize-query-stats-collection.md

@@ -17,7 +17,7 @@ This article describes how to optimize query statistics collection on an Azure D
 
 ## Use pg_stats_statements
 
-**Pg_stat_statements** is a PostgreSQL extension that's enabled by default in Azure Database for PostgreSQL. The extension provides a means to track execution statistics for all SQL statements executed by a server. This module hooks into every query execution and comes with a non-trivial performance cost. Enabling **pg_stat_statements** forces query text writes to files on disk.
+**Pg_stat_statements** is a PostgreSQL extension that can be enabled in Azure Database for PostgreSQL. The extension provides a means to track execution statistics for all SQL statements executed by a server. This module hooks into every query execution and comes with a non-trivial performance cost. Enabling **pg_stat_statements** forces query text writes to files on disk.
 
 If you have unique queries with long query text or you don't actively monitor **pg_stat_statements**, disable **pg_stat_statements** for best performance. To do so, change the setting to `pg_stat_statements.track = NONE`.