标签：latch sqlplus 缓冲区 must prompt serve code 获取 命令
用于初始化设置系统环境
Login.bat
@echo off
title eoda
mode con cols=140
color 85
set ORACLE_SID=muphy
sqlplus eoda/foo
用于初始化SQL*PLUS运行环境
define _editor=vim --设置编辑器为vim
set serveroutput on size 1000000 --设置打开DBMS_OUTPUT并设置默认缓冲区
set trimspool on --设置去除命令两端的空格
set long 5000 --设置long和clob列时默认显示字节数
set linesize 1000
set pagesize 9999
column plan_plus_exp format a80
column table_name format a30
column index_name format a30
column name format a30
column value format a30
column table format a30
set sqlprompt ‘&_user.@&_connect_identifier.> ‘ --设置提示符指示谁登陆到那个数据库
SET AUTOTRANCE OFF
SET AUTOTRANCE ON EXPLAIN --只显示执行计划
SET AUTOTRANCE ON STATISTICS --只显示统计结果
SET AUTOTRANCE ONLY --不显示查询结果
SET AUTOTRACE TRANCEONLY EXPLAN --只显示执行计划
$ sqlplus / as sysdba
sys/eoda > @spcreate
需要有查看视图的权限
conn / as sysdba
grant select on v_$statname to eoda;
grant select on v_$mystat to eoda;
grant select on v_$latch to eoda;
grant select on v_$timer to eoda;
conn eoda/foo
drop table run_stats;
set echo on;
create or replace view stats
as select ‘STAT...‘ || a.name name, b.value
from v$statname a, v$mystat b
where a.statistic# = b.statistic#
union all
select ‘LATCH.‘ || name, gets
from v$latch
union all
select ‘STAT...Elapsed Time‘, hsecs from v$timer;
create global temporary table run_stats
( runid varchar2(15),
name varchar2(80),
value int )
on commit preserve rows;
用于比较两个sql之间的性能，会测量3个要素：耗用时间、系统统计信息和闩定
create or replace package runstats_pkg
as
procedure rs_start;
procedure rs_middle;
procedure rs_stop(p_difference_threshold in number default 0 );
end;
/
create or replace package body runstats_pkg
as
g_start number;
g_run1 number;
g_run2 number;
procedure rs_start
is
begin
delete from run_stats;
insert into run_stats
select ‘before‘, stats.* from stats;
g_start := dbms_utility.get_cpu_time;
end;
procedure rs_middle
is
begin
g_run1 := (dbms_utility.get_cpu_time-g_start);
insert into run_stats
select ‘after 1‘, stats.* from stats;
g_start := dbms_utility.get_cpu_time;
end;
procedure rs_stop(p_difference_threshold in number default 0)
is
begin
g_run2 := (dbms_utility.get_cpu_time-g_start);
dbms_output.put_line( ‘Run1 ran in ‘ || g_run1 || ‘ cpu hsecs‘ );
dbms_output.put_line( ‘Run2 ran in ‘ || g_run2 || ‘ cpu hsecs‘ );
if ( g_run2 <> 0 )
then
dbms_output.put_line
( ‘run 1 ran in ‘ || round(g_run1/g_run2*100,2) ||
‘% of the time‘ );
end if;
dbms_output.put_line( chr(9) );
insert into run_stats
select ‘after 2‘, stats.* from stats;
dbms_output.put_line
( rpad( ‘Name‘, 30 ) || lpad( ‘Run1‘, 16 ) ||
lpad( ‘Run2‘, 16 ) || lpad( ‘Diff‘, 16 ) );
for x in
( select rpad( a.name, 30 ) ||
to_char( b.value-a.value, ‘999,999,999,999‘ ) ||
to_char( c.value-b.value, ‘999,999,999,999‘ ) ||
to_char( ( (c.value-b.value)-(b.value-a.value)),
‘999,999,999,999‘ ) data
from run_stats a, run_stats b, run_stats c
where a.name = b.name
and b.name = c.name
and a.runid = ‘before‘
and b.runid = ‘after 1‘
and c.runid = ‘after 2‘
and abs( (c.value-b.value) - (b.value-a.value) )
> p_difference_threshold
order by abs( (c.value-b.value)-(b.value-a.value))
) loop
dbms_output.put_line( x.data );
end loop;
dbms_output.put_line( chr(9) );
dbms_output.put_line
( ‘Run1 latches total versus runs -- difference and pct‘ );
dbms_output.put_line
( lpad( ‘Run1‘, 14 ) || lpad( ‘Run2‘, 19 ) ||
lpad( ‘Diff‘, 18 ) || lpad( ‘Pct‘, 11 ) );
for x in
( select to_char( run1, ‘9,999,999,999,999‘ ) ||
to_char( run2, ‘9,999,999,999,999‘ ) ||
to_char( diff, ‘9,999,999,999,999‘ ) ||
to_char( round( run1/decode( run2, 0, to_number(0), run2) *100,2 ), ‘99,999.99‘ ) || ‘%‘ data
from ( select sum(b.value-a.value) run1, sum(c.value-b.value) run2,
sum( (c.value-b.value)-(b.value-a.value)) diff
from run_stats a, run_stats b, run_stats c
where a.name = b.name
and b.name = c.name
and a.runid = ‘before‘
and b.runid = ‘after 1‘
and c.runid = ‘after 2‘
and a.name like ‘LATCH%‘
)
) loop
dbms_output.put_line( x.data );
end loop;
end;
end;
/
前者统计初始情况，或者统计执行sql之后的情况和报告差异
set echo off
set verify off
column value new_val V
define S="&1"
set autotrace off
select a.name, b.value
from v$statname a, v$mystat b
where a.statistic# = b.statistic#
and lower(a.name) = lower(‘&S‘)
/
set echo on
set echo off
set verify off
select a.name, b.value V, to_char(b.value-&V,‘999,999,999,999‘) diff
from v$statname a, v$mystat b
where a.statistic# = b.statistic#
and lower(a.name) = lower(‘&S‘)
/
set echo on
用于打印数据库段的空间利用率信息
create or replace procedure show_space
( p_segname in varchar2, -- 段名（表、索引）
p_owner in varchar2 default user, -- 默认为当前用户
p_type in varchar2 default ‘TABLE‘, -- 默认为表类型
p_partition in varchar2 default NULL ) -- 分区对象的分区名
authid current_user
as
l_free_blks number;
l_total_blocks number;
l_total_bytes number;
l_unused_blocks number;
l_unused_bytes number;
l_LastUsedExtFileId number;
l_LastUsedExtBlockId number;
l_LAST_USED_BLOCK number;
l_segment_space_mgmt varchar2(255);
l_unformatted_blocks number;
l_unformatted_bytes number;
l_fs1_blocks number; l_fs1_bytes number;
l_fs2_blocks number; l_fs2_bytes number;
l_fs3_blocks number; l_fs3_bytes number;
l_fs4_blocks number; l_fs4_bytes number;
l_full_blocks number; l_full_bytes number;
-- 内部存储过程，用于格式化打印
procedure p( p_label in varchar2, p_num in number )
is
begin
dbms_output.put_line( rpad(p_label,40,‘.‘) ||
to_char(p_num,‘999,999,999,999‘) );
end;
begin
-- 动态sql判断对象是否ASSM
begin
execute immediate
‘select ts.segment_space_management
from dba_segments seg, dba_tablespaces ts
where seg.segment_name = :p_segname
and (:p_partition is null or
seg.partition_name = :p_partition)
and seg.owner = :p_owner
and seg.tablespace_name = ts.tablespace_name‘
into l_segment_space_mgmt
using p_segname, p_partition, p_partition, p_owner;
exception
when too_many_rows then
dbms_output.put_line
( ‘This must be a partitioned table, use p_partition => ‘);
return;
end;
-- 如果对象是ASSM 表空间, 调用dbms_space.space_usage
-- 否则调用dbms_space.free_blocks
if l_segment_space_mgmt = ‘AUTO‘
then
dbms_space.space_usage
( p_owner, p_segname, p_type, l_unformatted_blocks,
l_unformatted_bytes, l_fs1_blocks, l_fs1_bytes,
l_fs2_blocks, l_fs2_bytes, l_fs3_blocks, l_fs3_bytes,
l_fs4_blocks, l_fs4_bytes, l_full_blocks, l_full_bytes, p_partition);
p( ‘Unformatted Blocks ‘, l_unformatted_blocks );
p( ‘FS1 Blocks (0-25) ‘, l_fs1_blocks );
p( ‘FS2 Blocks (25-50) ‘, l_fs2_blocks );
p( ‘FS3 Blocks (50-75) ‘, l_fs3_blocks );
p( ‘FS4 Blocks (75-100)‘, l_fs4_blocks );
p( ‘Full Blocks ‘, l_full_blocks );
else
dbms_space.free_blocks(
segment_owner => p_owner,
segment_name => p_segname,
segment_type => p_type,
freelist_group_id => 0,
free_blks => l_free_blks);
p( ‘Free Blocks‘, l_free_blks );
end if;
-- 调用dbms_space.unused_space获取未使用的空间信息
dbms_space.unused_space
( segment_owner => p_owner,
segment_name => p_segname,
segment_type => p_type,
partition_name => p_partition,
total_blocks => l_total_blocks,
total_bytes => l_total_bytes,
unused_blocks => l_unused_blocks,
unused_bytes => l_unused_bytes,
LAST_USED_EXTENT_FILE_ID => l_LastUsedExtFileId,
LAST_USED_EXTENT_BLOCK_ID => l_LastUsedExtBlockId,
LAST_USED_BLOCK => l_LAST_USED_BLOCK );
p( ‘Total Blocks‘, l_total_blocks );
p( ‘Total Bytes‘, l_total_bytes );
p( ‘Total MBytes‘, trunc(l_total_bytes/1024/1024) );
p( ‘Unused Blocks‘, l_unused_blocks );
p( ‘Unused Bytes‘, l_unused_bytes );
p( ‘Last Used Ext FileId‘, l_LastUsedExtFileId );
p( ‘Last Used Ext BlockId‘, l_LastUsedExtBlockId );
p( ‘Last Used Block‘, l_LAST_USED_BLOCK );
end;
/
标签：latch sqlplus 缓冲区 must prompt serve code 获取 命令
原文地址：https://www.cnblogs.com/muphy/p/10890069.html
