Update the docs to require postgres v14+

Author: 0xgouda

docs/concept/components.md

@@ -49,11 +49,9 @@ language:
 
 ### [PostgreSQL](https://www.postgresql.org/)
 
-PostgreSQL is a world's most advanced Open Source RDBMS.
+PostgreSQL is the world's most advanced Open Source RDBMS.
 
-Postgres storage is based on the JSONB datatype so minimally
-version 9.4+ is required, but for bigger setups where partitioning
-is a must, v11+ is needed. Any already existing Postgres database
+Postgres version 14+ is required. Any already existing Postgres database
 will do the trick, see the [Bootstrapping the Metrics DB](../howto/metrics_db_bootstrap.md) section for details.
 
 ### [TimescaleDB](https://www.timescale.com/)

docs/reference/metric_definitions.md

@@ -169,11 +169,11 @@ Here is the structure of a metric definition in YAML format:
 
     !!! Notice
         Note the "minimally supported" part - i.e.
-        if your query will work from version v11.x to v17.x, then you only
-        need one entry called "11". If there was a breaking change in
-        the internal catalogs at v13 so that the query stopped working,
-        you need a new entry named "13" that will be used for all
-        versions above v13.
+        if your query will work from version v14.x to v18.x, then you only
+        need one entry called "14". If there was a breaking change in
+        the internal catalogs at v15 so that the query stopped working,
+        you need a new entry named "15" that will be used for all
+        versions above v14.
 
 - *gauges*
 

docs/tutorial/custom_installation.md

@@ -12,7 +12,7 @@ visualize the gathered metrics.
 
 ### Overview of installation steps
 
-1. Install Postgres or use any available existing instance - v11+
+1. Install Postgres or use any available existing instance - v14+
     is required but the latest major version is recommended.
 1. Bootstrap the configuration database.
 1. Bootstrap the metrics measurements storage database aka sink (PostgreSQL here).
@@ -41,7 +41,7 @@ syntax differences.
 1. **Install Postgres**
 
     Follow the standard Postgres install procedure basically. Use the
-    latest major version available, but minimally v11+ is required.
+    latest major version available, but minimally v14+ is required.
 
     To get the latest Postgres versions, official Postgres PGDG repos
     are to be preferred over default disto repos. Follow the
@@ -311,7 +311,7 @@ setting up a Postgres database for the configuration, one would use a
 YAML file. For details on individual steps like installing pgwatch see the above
 paragraph.
 
-1. Install Postgres or use any available existing instance - v11+
+1. Install Postgres or use any available existing instance - v14+
     is required but the latest major version is recommended.
 1. Edit the YAML file to include the sources to be monitored.
 1. Bootstrap the metrics measurements storage database aka sink (PostgreSQL here).