Add Limit Execution Time Of Statements as a postgres til.

postgres/limit-execution-time-of-statements.md

@@ -0,0 +1,26 @@
+# Limit Execution Time Of Statements
+
+You can limit the amount of time that postgres will execute a statement
+by setting a hard timeout. By default the timeout is 0 (see `show
+statement_timeout;`) which means statements will be given as much time as
+they need.
+
+If you do want to limit your statements, to say, 1 second, you can set the
+execution time like so
+
+```sql
+> set statement_timeout = '1s';
+SET
+> show statement_timeout;
+ statement_timeout
+-------------------
+ 1s
+(1 row)
+```
+
+Any queries taking longer than 1 second will be aborted with the following
+message output
+
+```
+ERROR:  canceling statement due to statement timeout
+```