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本章内容：
1. PL/SQL调优工具（使用PL/SQL剖析器API、使用跟踪API、使用PL/SQL层次式剖析器）
2. PL/SQL优化级别
3. 子程序内联
代码如下：
1. 查看PLSQL_DEBUG参数
SQL> show parameter plsql_debug
NAME TYPE VALUE
------------------------------------ --------------------------------- ------------------------------
plsql_debug boolean FALSE2. 启用会话级PLSQL_DEBUG
SQL> ALTER SESSION SET PLSQL_DEBUG = TRUE;
Session altered.3. 运行TRACETABL.SQL
SQL> @D:\app\<USER>\product\12.1.0\dbhome_2\RDBMS\ADMIN\tracetab.sql
Table dropped.
Table dropped.
Sequence dropped.
Table created.
Comment created.
Table created.
Comment created.
Sequence created.其中，TRACETABL.SQL的内容如下：
Rem
Rem $Header: tracetab.sql 31-mar-2006.16:45:38 jmuller Exp $
Rem
Rem tracetab.sql
Rem
Rem Copyright (c) 1999, 2006, Oracle. All rights reserved.
Rem
Rem NAME
Rem tracetab.sql
Rem
Rem DESCRIPTION
Rem Create tables for the PL/SQL tracer
Rem
Rem NOTES
Rem This script must be run under SYS
Rem
Rem The following tables are required to collect data
Rem plsql_trace_runs - information on trace runs
Rem plsql_trace_event - detailed trace data
Rem
Rem For security reasons, these tables are created under SYS, and are
Rem unique system-wide. The DBA should explicitly grant access to these
Rem tables to those users who require it.
Rem
Rem The plsql_trace_runnumber sequence is used for generating unique
Rem run numbers.
Rem
Rem THIS SCRIPT DELETES ALL EXISTING DATA!
Rem
Rem MODIFIED (MM/DD/YY)
Rem jmuller 03/14/06 - Fix bug 5066528: several tracing enhancements
Rem dalpern 05/18/05 - 4180912: improved info in PLSQL_TRACE_EVENTS
Rem jmuller 10/16/02 - Fix bug 2610154: widen *dblink columns
Rem astocks 09/16/99 - Make use of sys consistent
Rem jmuller 10/07/99 - Fix bug 708690: TAB -> blank
Rem astocks 06/07/99 - Tables for PL/SQL tracer
Rem astocks 06/07/99 - Created
Rem
Rem
drop table sys.plsql_trace_events cascade constraints;
drop table sys.plsql_trace_runs cascade constraints;
drop sequence sys.plsql_trace_runnumber;
create table sys.plsql_trace_runs
(
runid number primary key, -- unique run identifier,
-- from plsql_trace_runnumber
run_date date, -- start time of run
run_owner varchar2(31), -- account under which run was made
run_comment varchar2(2047), -- user provided comment for this run
run_comment1 varchar2(2047), -- additional user-supplied comment
run_end date, -- termination time for this run
run_flags varchar2(2047), -- flags for this run
related_run number, -- for correlating client/server
run_system_info varchar2(2047), -- currently unused
spare1 varchar2(256) -- unused
);
comment on table sys.plsql_trace_runs is
'Run-specific information for the PL/SQL trace';
create table sys.plsql_trace_events
(
runid number references sys.plsql_trace_runs,-- run identifier
event_seq number, -- unique sequence number within run
event_time date, -- timestamp
related_event number,
event_kind number,
event_unit_dblink varchar2(4000),
event_unit_owner varchar2(31),
event_unit varchar2(31), -- unit where the event happened
event_unit_kind varchar2(31),
event_line number, -- line in the unit where event happened
event_proc_name varchar2(31), -- if not empty, procedure where event
-- happened
stack_depth number,
--
-- Fields that apply to procedure calls
proc_name varchar2(31), -- if not empty, name of procedure called
proc_dblink varchar2(4000),
proc_owner varchar2(31),
proc_unit varchar2(31),
proc_unit_kind varchar2(31),
proc_line number,
proc_params varchar2(2047),
--
-- Fields that apply to ICDs (Calls to PL/SQL internal routines)
icd_index number,
--
-- Fields that apply to exceptions
user_excp number,
excp number,
--
-- Field for comments
-- User defined event - text supplied by user
-- SQL event - actual SQL string
-- Others - Description of event
event_comment varchar2(2047),
----
-- Fields for bulk binds
-- ?
--
-- Fields from dbms_application_info, dbms_session, and ECID
module varchar2(4000),
action varchar2(4000),
client_info varchar2(4000),
client_id varchar2(4000),
ecid_id varchar2(4000),
ecid_seq number,
--
--
-- Fields for extended callstack and errorstack info
-- (currently set only for "Exception raised", "Exception handled" and "Trace
-- flags changed" ([5066528]) events)
--
callstack clob,
errorstack clob,
--
primary key(runid, event_seq)
);
comment on table sys.plsql_trace_events is
'Accumulated data from all trace runs';
create sequence sys.plsql_trace_runnumber start with 1 nocache;
4. 用户授权
SQL> grant select on plsql_trace_events to c##student;
Grant succeeded.
SQL> grant select on plsql_trace_runs to c##student;
Grant succeeded.
5. 测试
SQL> /* Formatted on 2018/11/19 23:11:50 (QP5 v5.256.13226.35538) */
SQL> CREATE OR REPLACE PROCEDURE TEST_TRACE
2 AS
3 v_num1 NUMBER;
4 v_num2 NUMBER;
5 v_num3 NUMBER;
6 v_date DATE;
7 BEGIN
8 FOR i IN 1 .. 10
9 LOOP
10 v_num1 := 1;
11 v_num2 := i + i / 2 + SQRT (i);
12 v_num3 := v_num1 + v_num2;
13
14 SELECT SYSDATE INTO v_date FROM DUAL;
15 END LOOP;
16 END;
17 /
Procedure created.
SQL>
SQL> BEGIN
2 DBMS_TRACE.SET_PLSQL_TRACE(DBMS_TRACE.TRACE_ALL_CALLS);
3 TEST_TRACE;
4 DBMS_TRACE.CLEAR_PLSQL_TRACE;
5 END;
6 /SQL> SELECT R.RUNID,
2 E.EVENT_SEQ,
3 E.EVENT_UNIT_OWNER,
4 E.EVENT_UNIT,
5 E.EVENT_UNIT_KIND,
6 E.PROC_LINE,
7 E.EVENT_COMMENT
8 FROM PLSQL_TRACE_RUNS R, PLSQL_TRACE_EVENTS E
9 WHERE R.RUNID = 1 AND R.RUNID = E.RUNID
10 ORDER BY R.RUNID, E.EVENT_SEQ;
RUNID EVENT_SEQ EVENT_UNIT EVENT_UNIT EVENT_UNIT_KIND PROC_LINE EVENT_COMMENT
----- --------- ---------- ------------ --------------- --------- ------------------------------
1 1 PL/SQL Trace Tool started
1 2 Trace flags changed
1 3 SYS DBMS_TRACE PACKAGE BODY 75 Return from procedure call
1 4 SYS DBMS_TRACE PACKAGE BODY 81 Return from procedure call
1 5 SYS DBMS_TRACE PACKAGE BODY 3 Return from procedure call
1 6 <anonymous> ANONYMOUS BLOCK 1 Procedure Call
1 7 SYS TEST_TRACE PROCEDURE PL/SQL Internal Call
1 8 SYS TEST_TRACE PROCEDURE PL/SQL Internal Call
1 9 SYS TEST_TRACE PROCEDURE PL/SQL Internal Call
1 10 SYS TEST_TRACE PROCEDURE PL/SQL Internal Call
1 11 SYS TEST_TRACE PROCEDURE PL/SQL Internal Call
1 12 SYS TEST_TRACE PROCEDURE PL/SQL Internal Call
1 13 SYS TEST_TRACE PROCEDURE PL/SQL Internal Call
1 14 SYS TEST_TRACE PROCEDURE PL/SQL Internal Call
1 15 SYS TEST_TRACE PROCEDURE PL/SQL Internal Call
1 16 SYS TEST_TRACE PROCEDURE PL/SQL Internal Call
1 17 SYS TEST_TRACE PROCEDURE 4 Return from procedure call
1 18 <anonymous> ANONYMOUS BLOCK 92 Procedure Call
1 19 SYS DBMS_TRACE PACKAGE BODY 69 Procedure Call
1 20 SYS DBMS_TRACE PACKAGE BODY 64 Procedure Call
1 21 SYS DBMS_TRACE PACKAGE BODY 12 Procedure Call
1 22 SYS DBMS_TRACE PACKAGE BODY 66 Return from procedure call
1 23 SYS DBMS_TRACE PACKAGE BODY 72 Return from procedure call
1 24 SYS DBMS_TRACE PACKAGE BODY 21 Procedure Call
1 25 PL/SQL trace stopped