2026-03-12 20:23:15

csierra/cs_acs_disable.sql

@@ -0,0 +1,51 @@
+----------------------------------------------------------------------------------------
+--
+-- File name:   cs_acs_disable.sql
+--
+-- Purpose:     Disable Adaptive Cursor Sharing (ACS)
+--
+-- Author:      Carlos Sierra
+--
+-- Version:     2022/02/07
+--
+-- Usage:       Connecting into PDB or CDB.
+--
+--              Confirm when requested.
+--
+-- Example:     $ sqlplus / as sysdba
+--              SQL> @cs_acs_disable.sql
+--
+-- Notes:       Developed and tested on 19c.
+--
+---------------------------------------------------------------------------------------
+--
+@@cs_internal/cs_primary.sql
+@@cs_internal/cs_cdb_warn.sql
+@@cs_internal/cs_set.sql
+@@cs_internal/cs_def.sql
+--
+PRO
+PRO ***
+PRO *** You are about to DISABLE Adaptive Cursor Sharing (ACS) for &&cs_con_name.
+PRO ***
+PRO
+PRO 1. Enter "Yes" (case sensitive) to continue, else <ctrl>-C
+DEF cs_confirm = '&1.';
+UNDEF 1;
+--
+SET SERVEROUT ON;
+BEGIN
+  IF '&&cs_confirm.' = 'Yes' THEN
+    EXECUTE IMMEDIATE 'ALTER SYSTEM SET "_optimizer_adaptive_cursor_sharing" = FALSE';
+    EXECUTE IMMEDIATE 'ALTER SYSTEM SET "_optimizer_extended_cursor_sharing_rel" = "NONE"';
+    EXECUTE IMMEDIATE 'ALTER SYSTEM SET "_optimizer_extended_cursor_sharing" = "NONE"';
+    DBMS_OUTPUT.put_line('Done');
+  ELSE
+    DBMS_OUTPUT.put_line('Null');
+  END IF;
+END;
+/
+--
+@@cs_internal/cs_undef.sql
+@@cs_internal/cs_reset.sql
+--