今天是2013-09-26，进行tkprof工具使用学习，在此记录一下笔记：
一）查看需要跟踪会话信息：
select s.sid,s.serial#,s.username,s.logon_time,s.osuser,(select sys_context('userenv','ip_address') from dual) as ipa,
s.machine,p.username,p.program,p.spid
from v$session s,v$process p
where s.paddr=p.addr and s.username='SCOTT';
二）对会话开启sql trace功能：
[html]
SQL> begin
2 dbms_system.set_int_param_in_session(47,43,'max_dump_file_size',10485760);
3
4 dbms_system.set_bool_param_in_session(47,43,'timed_statistics',true);
5 dbms_system.set_sql_trace_in_session(47,43,true);
6 end;
7 /
PL/SQL procedure successfully completed.
SQL> begin
2 dbms_system.set_sql_trace_in_session(47,43,false);
3 end;
4 /
PL/SQL procedure successfully completed.
SQL>
3）tkprof工具介绍：
[oracle@oracle-one trace]$ tkprof
Usage: tkprof tracefile outputfile [explain= ] [table= ]
[print= ] [insert= ] [sys= ] [sort= ]
table=schema.tablename Use 'schema.tablename' with 'explain=' option.
explain=user/password Connect to ORACLE and issue EXPLAIN PLAN.
print=integer List only the first 'integer' SQL statements.
aggregate=yes|no
insert=filename List SQL statements and data inside INSERT statements.
sys=no TKPROF does not list SQL statements run as user SYS.
record=filename Record non-recursive statements found in the trace file.
waits=yes|no Record summary for any wait events found in the trace file.
sort=option Set of zero or more of the following sort options:
prscnt number of times parse was called
prscpu cpu time parsing
prsela elapsed time parsing
prsdsk number of disk reads during parse
prsqry number of buffers for consistent read during parse
prscu number of buffers for current read during parse
prsmis number of misses in library cache during parse
execnt number of execute was called
execpu cpu time spent executing
exeela elapsed time executing
exedsk number of disk reads during execute
exeqry number of buffers for consistent read during execute
execu number of buffers for current read during execute
exerow number of rows processed during execute
exemis number of library cache misses during execute
fchcnt number of times fetch was called
fchcpu cpu time spent fetching
fchela elapsed time fetching
fchdsk number of disk reads during fetch
fchqry number of buffers for consistent read during fetch
fchcu number of buffers for current read during fetch
fchrow number of rows fetched
userid userid of user that parsed the cursor
[oracle@oracle-one trace]$
tracefile:就是跟着的tracefile名字
outputfile：就是把格式化之后的信息存入一个新的文件中
table：每次解析执行sql过程的时候会在
数据库自动创建一个表，执行完后自动删除，也可以手动创建一个 表，然把信息存入该表中
这个表的结构需要和utlxplan.sql文件中表的结构一样。当执行完后该表信息被清空。
explain：使用哪个用户对sql进行解析
print：打印出integer个sql，可以和sort联合使用，打印出指定sort序列的几个sql
例如我可以找去消耗cpu最多的sql等等。
sort：按照要求进行排序，排序种类如下：
prscnt number of times parse was called
prscpu cpu time parsing
prsela elapsed time parsing
prsdsk number of disk reads during parse
prsqry number of buffers for consistent read during parse
prscu number of buffers for current read during parse
prsmis number of misses in library cache during parse
execnt number of execute was called
execpu cpu time spent executing
exeela elapsed time executing
exedsk number of disk reads during execute
exeqry number of buffers for consistent read during execute