Add some upcoming correctness changes

src/content/doc-surrealdb/cli/env.mdx

@@ -22,6 +22,8 @@ Environment variables are divided into four types:
 
 ## SurrealDB environment variables
 
+Many environment variables have a maximum value equivalent to the greatest possible `usize`, which is an unsigned integer with a number of bytes depending on the target that the database runs on. For most systems this will be 64 bits, leading to a maximum size of 18_446_744_073_709_551_615 (2<sup>64</sup>), while for 32 bits the maximum will be 4_294_967_296 (2<sup>32</sup>).
+
 <table>
   <thead>
     <tr>

src/content/doc-surrealql/statements/define/analyzer.mdx

@@ -541,3 +541,17 @@ This example creates an analyzer specifically designed for source code analysis.
 -- Creates an analyzer suitable for source code analysis.
 DEFINE ANALYZER code TOKENIZERS class,camel FILTERS lowercase,ascii;
 ```
+
+## Attempting to remove an analyzer may fail
+
+<Since v="v3.0.0-beta" />
+
+An analyzer can only be removed if it is currently unused by an index.
+
+```surql
+DEFINE ANALYZER example_blank TOKENIZERS blank;
+DEFINE INDEX example_index ON example FIELDS name FULLTEXT ANALYZER example_blank;
+REMOVE ANALYZER example_blank;
+-- Output:
+"Cannot delete analyzer `example_blank` which is used by index(es) `example.example_index`"
+```