cassandra.h: state correct default IO threads num

wprzytula · wprzytula · commit aabe6cd4827a · 2025-07-31T18:06:03.000+02:00
CPP-Rust Driver since its beginnings has used a default number of IO
threads that is the default of tokio multi-threaded runtime, which is
equal to the number of CPU cores available to the system.
This commit updates the documentation to reflect this behaviour.
diff --git a/include/cassandra.h b/include/cassandra.h
@@ -1732,7 +1732,7 @@ cass_cluster_set_serial_consistency(CassCluster* cluster,
  * Sets the number of IO threads. This is the number of threads
  * that will handle query requests.
  *
- * <b>Default:</b> 1
+ * <b>Default:</b> Number of CPU cores available to the system.
  *
  * @public @memberof CassCluster
  *

Original file line number	Diff line number	Diff line change
`@@ -1732,7 +1732,7 @@ cass_cluster_set_serial_consistency(CassCluster* cluster,`
`1732`	`1732`	`* Sets the number of IO threads. This is the number of threads`
`1733`	`1733`	`* that will handle query requests.`
`1734`	`1734`	`*`
`1735`		`- * <b>Default:</b> 1`
	`1735`	`+ * <b>Default:</b> Number of CPU cores available to the system.`
`1736`	`1736`	`*`
`1737`	`1737`	`* @public @memberof CassCluster`
`1738`	`1738`	`*`