2026-03-12 20:23:15
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260
vdh/sga_report.sql
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260
vdh/sga_report.sql
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/* This script generates an overview of the memory settings and usage of a database
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Run the script as an admin user (eg SYS) from within sqlplus.
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A logfile will be created in the current working directory
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*/
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--- set layout options
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clear breaks
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set pagesize 9999
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set linesize 150
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set verify off
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set echo off
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set feedback off
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set trimspool on
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-- initialize spoolfile
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--column dcol new_value spoolname noprint
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--column inputpar01 new_value 1 noprint
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--select 1 inputpar01 from dual where 1=2;
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--select
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-- nvl('&1', db_unique_name || '_' || to_char(sysdate,'YYYYMMDDHH24MISS') || '_memory_report.log') dcol
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--from
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-- v$database
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--;
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--undefine 1
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--spool &spoolname
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--- db and platform identification
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prompt
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prompt DB IDENTIFICATION
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prompt ------------------
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set linesize 200
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column platform_name format a40
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column name format a15
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column db_unique_name format a20
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select
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dbid, name, db_unique_name, database_role, platform_name
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from
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v$database
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;
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column host_name format a40
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prompt
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select
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instance_number, instance_name, host_name, version
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from
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gv$instance
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order by
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instance_number
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;
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--- sga spfile parameter
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prompt
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prompt
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prompt SGA PARAMETERS
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prompt --------------
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column name format a40
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column value format a25
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column description format a40 word_wrapped
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set linesize 150
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select ksppinm name, ksppstvl value, ksppstdf isdefault, x.inst_id inst_id, ksppdesc description
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from x$ksppi x, x$ksppcv y
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where (x.indx = y.indx)
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and ksppinm in
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( 'sga_target', 'sga_max_target', 'memory_target', 'db_cache_size',
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'db_2k_cache_size', 'db_4k_cache_size', 'db_8k_cache_size',
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'db_16k_cache_size', 'db_32k_cache_size', 'db_keep_cache_size',
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'db_recycle_cache_size', 'java_pool_size', 'large_pool_size',
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'olap_page_pool_size'
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)
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order by ksppinm, x.inst_id;
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--- sga overview
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prompt
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prompt
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prompt SGA OVERVIEW
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prompt ------------
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set linesize 120
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set pagesize 9999
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column component format a40
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column curr_mb format 99G999D99
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column min_mb format 99G999D99
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column max_mb format 99G999D99
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column user_mb format 99G999D99
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column granule_mb format 99G999D99
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compute sum of curr_mb on report
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break on report
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select component, current_size/1024/1024 curr_mb, min_size/1024/1024 min_mb, max_size/1024/1024 max_mb,
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user_specified_size/1024/1024 user_mb, granule_size/1024/1024 granule_mb
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from v$sga_dynamic_components
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order by component;
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clear breaks
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--- sga resizes
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prompt
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prompt
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prompt SGA RESIZE OPERATIONS
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prompt ---------------------
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set linesize 250
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set pages 9999
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column start_time format a20
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column end_time format a20
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column initial_mb format 999G999D99
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column target_mb format 999G999D99
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column final_mb format 999G999D99
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column component format a30
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select *
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from ( select to_char(start_time, 'DD/MM/YYYY HH24:MI:SS') start_time, to_char(end_time, 'DD/MM/YYYY HH24:MI:SS') end_time,
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component, oper_type, oper_mode, initial_size/1024/1024 initial_mb, target_size/1024/1024 target_mb,
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final_size/1024/1024 final_mb, status
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from v$sga_resize_ops a
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order by a.start_time desc
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)
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where rownum <= 40;
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--- sqlcursor memory usage per parsing schema
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prompt
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prompt
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prompt SQL CURSOR MEMORY
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prompt -----------------
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set linesize 150
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column sharable_mem_kb format 99G999G999D00
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column persistent_mem_kb format 99G999G999D00
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column runtime_mem_kb format 99G999G999D00
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column cursor_cnt format 999G999G990
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column unique_cursor_cnt format 999G999G990
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compute sum of sharable_mem_kb on report
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compute sum of persistent_mem_kb on report
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compute sum of runtime_mem_kb on report
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compute sum of cursor_cnt on report
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compute sum of unique_cursor_cnt on report
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break on report
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with
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childs as
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( select
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parsing_schema_id,
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sql_id,
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count(*) child_cnt
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from
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v$sql
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group by
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parsing_schema_id,
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sql_id
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),
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mchild as
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( select
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parsing_schema_id,
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max(child_cnt) max_child_cnt
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from
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childs
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group by
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parsing_schema_id
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),
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vsql as
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( select
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parsing_schema_id,
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count(*) cursor_cnt,
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count(distinct sql_id) unique_cursor_cnt,
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sum(sharable_mem)/1024 sharable_mem_kb,
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sum(persistent_mem)/1024 persistent_mem_kb,
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sum(runtime_mem)/1024 runtime_mem_kb
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from
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v$sql
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group by
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parsing_schema_id
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)
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select
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username, cursor_cnt, unique_cursor_cnt, max_child_cnt,
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sharable_mem_kb, persistent_mem_kb, runtime_mem_kb
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from
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mchild,
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vsql,
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dba_users usr
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where
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vsql.parsing_schema_id = mchild.parsing_schema_id
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and vsql.parsing_schema_id = usr.user_id
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order by
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username
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;
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clear breaks
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clear computes
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--- Top sql cursors by shared memory
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prompt
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prompt
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prompt TOP SQL CURSORS (by shared memory)
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prompt ----------------------------------
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set linesize 150
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column sharable_mem_kb format 99G999G999D00
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column persistent_mem_kb format 99G999G999D00
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column runtime_mem_kb format 99G999G999D00
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select
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*
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from
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( select
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sql_id,
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sum(sharable_mem)/1024 sharable_mem_kb,
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sum(persistent_mem)/1024 persistent_mem_kb,
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sum(runtime_mem)/1024 runtime_mem_kb,
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count(*) child_cnt,
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parsing_schema_name
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from
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v$sql
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group by
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sql_id,
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parsing_schema_name
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order by
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sharable_mem_kb desc,
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parsing_schema_name
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)
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where
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rownum <= 10
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;
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--- memory usage by pool
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prompt
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prompt
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prompt POOL OVERVIEW
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prompt -------------
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column bytes format 999G999G999G999
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compute sum of bytes on pool
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break on pool skip 1
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select pool, name, bytes
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from v$sgastat
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order by pool, name;
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--- END OF SCRIPT
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--spool off
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