-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.

BREAK ON snap_begin SKIP 1 ON snap_end ON event_name

COL event_name FOR A40

SELECT
    CAST(begin_interval_time AS DATE) snap_begin
  , TO_CHAR(CAST(end_interval_time AS DATE), 'HH24:MI') snap_end
  , category
  , num_processes
  , ROUND(allocated_max/1048576)     max_mb
  , ROUND(max_allocated_max/1048576) max_max_mb
FROM
    dba_hist_snapshot
  NATURAL JOIN
    dba_hist_process_mem_summary
WHERE
    begin_interval_time > SYSDATE - 3
--AND category = 'SQL'
ORDER BY
    snap_begin
  , category
/