科学记数法

Library cache pin :

P1=handle address

P2=lock address

p3=mode * 100 + namespace

SQL>  select sid,blocking_session,p1,p1raw,p2,p3,event from v$session where event not like '%message%' and sid in (20,1137,22);

       SID BLOCKING_SESSION	    P1 P1RAW			P2	   P3 EVENT
---------- ---------------- ---------- ---------------- ---------- ---------- ----------------------------------------------------------------
	20		     537557208 00000000200A78D8        293	    0 latch: shared pool
	22	       1137  832829180 0000000031A3F6FC  618590516 3.2728E+14 library cache lock
      1137		 20  832829180 0000000031A3F6FC  831962136 3.2728E+14 library cache pin


libaray cache lock:

P1=handle address

P2=lock address

p3=mode * 100 + namespace

327280000000000


set echo off
set lines 3000 pages 5000 verify off heading on
undefine p3
select KGLSTDSC,KGLSTIDN,mod(&&p3,65536) as "MODE" from x$kglst where kglsttyp = 'NAMESPACE' and KGLSTIDN=trunc(&&p3/65536);
/
undefine p3

SQL> create or replace procedure prc_test1 
is
begin
  loop
  execute immediate 'select * from dual';
end loop;
end;   2    3    4    5    6    7  
  8  /

Procedure created.

SQL> select * from v$mystat where rownum<2;

       SID STATISTIC#	   VALUE
---------- ---------- ----------
       293	    0	       0

SQL> exec prc_test1;





SQL> select * from v$mystat where rownum<2;

       SID STATISTIC#	   VALUE
---------- ---------- ----------
       384	    0	       0

SQL> alter procedure prc_test1 compile
  2  
SQL> alter procedure prc_test1 compile
  2  ;




SQL> select sid,blocking_session,p1,p1raw,p2,p3,event from v$session where event not like '%message%' and sid in (293,384);

       SID BLOCKING_SESSION	    P1 P1RAW			P2	   P3 EVENT
---------- ---------------- ---------- ---------------- ---------- ---------- ----------------------------------------------------------------
       293		    1611722800 000000006010F030        336	    0 latch: shared pool
       384		293 1.1529E+10 00000002AF31D6B0 1.1609E+10 4.8136E+14 library cache pin

SQL> select sid, blocking_session, p1, p1raw, p2, to_char(p3,'999999999999999') as p3, event
  from v$session
 where event not like '%message%'
   and sid in (293, 384);  2    3    4  

       SID BLOCKING_SESSION	    P1 P1RAW			P2 P3		    EVENT
---------- ---------------- ---------- ---------------- ---------- ---------------- ----------------------------------------------------------------
       293		    1611722800 000000006010F030        336		  0 latch: shared pool
       384		293 1.1529E+10 00000002AF31D6B0 1.1609E+10  481362754732035 library cache pin

new   1: select KGLSTDSC,KGLSTIDN,mod(481362754732035,65536) as "MODE" from x$kglst where kglsttyp = 'NAMESPACE' and KGLSTIDN=trunc(481362754732035/65536)

no rows selected

E是exponent,表示以10为底的指数


4.8136E+14 其实是省略了后面的比如4.81362754732.。