Oracle技术之查看并行相关信息

下面我通过实验介绍三种查看并行相关内容，比如并行度、并行执行的实例等。

1、V$PQ_TQSTAT视图

�C 脚本

[oracle@rac1 ~]$ cat showdop.sql

column SERVER_TYPE format a15

column PROCESS format a10

select dfo_number,

  tq_id,

  server_type,

  process,

  num_rows,

  bytes,

      instance

from v$pq_tqstat

order by dfo_number desc,

  tq_id,

  server_type desc,

  process

/

luocs@LUOCS11G> select /*+ parallel(2) */ count(*) from ltb1;

COUNT(*)

----------

  3560448

luocs@LUOCS11G> @showdop

DFO_NUMBER      TQ_ID SERVER_TYPE     PROCESS      NUM_ROWS      BYTES   INSTANCE

---------- ---------- --------------- ---------- ---------- ---------- ----------

        1          0 Producer        P000                1         32          1

        1          0 Producer        P001                1         32          1

        1          0 Consumer        QC                  2         64          1

2、DBMS_MONITOR.CLIENT_ID_TRACE_ENABLE

luocs@WWW> BEGIN

 2  DBMS_SESSION.SET_IDENTIFIER('www.luocs.com');

 3  DBMS_MONITOR.CLIENT_ID_TRACE_ENABLE

 4     (CLIENT_ID => 'www.luocs.com',

 5      WAITS => TRUE

 6     );

 7  END;

 8  /

PL/SQL procedure successfully completed.

luocs@WWW> select /*+ parallel(3) */ count(*) from test1;

COUNT(*)

----------

   456128

luocs@WWW> exec DBMS_MONITOR.CLIENT_ID_TRACE_DISABLE('www.luocs.com');

PL/SQL procedure successfully completed.

sys@WWW> select client_identifier from v$session where sid=(select sid from v$mystat where rownum=1);

CLIENT_IDENTIFIER

----------------------------------------------------------------------------------------------------

www.luocs.com

sys@WWW> col PRIMARY_ID for a30

sys@WWW> select trace_type, primary_id, waits, binds from dba_enabled_traces;

TRACE_TYPE                                 PRIMARY_ID                     WAITS      BINDS

------------------------------------------ ------------------------------ ---------- ----------

CLIENT_ID                                  www.luocs.com                  TRUE       FALSE

[oracle@rac1 ~]$ cd /u01/app/oracle/diag/rdbms/www/ltb1/trace/

[oracle@rac1 trace]$ trcsess clientid=www.luocs.com output=luocs_test2.trc

[oracle@rac1 trace]$ ls luocs_test2.trc

-rw-r--r-- 1 oracle oinstall 103514 Jan 27 07:06 luocs_test2.trc

-- trace内容

select /*+ parallel(test 6) */ count(*) from test

END OF STMT

PARSE #47773847239296:c=4000,e=4501,p=0,cr=0,cu=0,mis=1,r=0,dep=0,og=1,plh=2661943167,tim=1359240732907091

WAIT #47773847239296: nam='PX Nsq: PQ load info query' ela= 200124 p1=0 p2=0 p3=0 obj#=6204 tim=1359240733107736

WAIT #47773847239296: nam='enq: PS - contention' ela= 685 name|mode=1347616774 instance=1 slave ID=0 obj#=6204 tim=1359240733109661

WAIT #47773847239296: nam='KJC: Wait for msg sends to complete' ela= 223 msg=2407172024 dest|rcvr=65536 mtype=12 obj#=6204 tim=1359240733110231

WAIT #47773847239296: nam='DFS lock handle' ela= 2548 type|mode=1128857605 id1=10 id2=1 obj#=6204 tim=1359240733113049

WAIT #47773847239296: nam='DFS lock handle' ela= 995 type|mode=1128857605 id1=10 id2=3 obj#=6204 tim=1359240733114376

WAIT #47773847239296: nam='DFS lock handle' ela= 48789 type|mode=1128857605 id1=10 id2=2 obj#=6204 tim=1359240733163413

WAIT #47773847239296: nam='enq: PI - contention' ela= 1634 name|mode=1346961409 operation=3 serial #=229371905 obj#=6204 tim=1359240733165315

WAIT #47773847239296: nam='KJC: Wait for msg sends to complete' ela= 12 msg=2407172024 dest|rcvr=65536 mtype=8 obj#=6204 tim=1359240733165376

WAIT #47773847239296: nam='enq: PS - contention' ela= 1911 name|mode=1347616774 instance=2 slave ID=1 obj#=6204 tim=1359240733167540

WAIT #47773847239296: nam='DFS lock handle' ela= 1855 type|mode=1128857605 id1=10 id2=1 obj#=6204 tim=1359240733169742

WAIT #47773847239296: nam='DFS lock handle' ela= 1231 type|mode=1128857605 id1=10 id2=3 obj#=6204 tim=1359240733171363

WAIT #47773847239296: nam='KJC: Wait for msg sends to complete' ela= 12 msg=2407172024 dest|rcvr=65536 mtype=16 obj#=6204 tim=1359240733171417

WAIT #47773847239296: nam='DFS lock handle' ela= 97952 type|mode=1128857605 id1=10 id2=2 obj#=6204 tim=1359240733269592

WAIT #47773847239296: nam='enq: PI - contention' ela= 1131 name|mode=1346961409 operation=3 serial #=229371905 obj#=6204 tim=1359240733271545

WAIT #47773847239296: nam='KJC: Wait for msg sends to complete' ela= 14 msg=2407172024 dest|rcvr=65536 mtype=8 obj#=6204 tim=1359240733271632

WAIT #47773847239296: nam='enq: PS - contention' ela= 1486 name|mode=1347616774 instance=3 slave ID=0 obj#=6204 tim=1359240733273339

WAIT #47773847239296: nam='DFS lock handle' ela= 1413 type|mode=1128857605 id1=10 id2=1 obj#=6204 tim=1359240733275028

WAIT #47773847239296: nam='DFS lock handle' ela= 992 type|mode=1128857605 id1=10 id2=3 obj#=6204 tim=1359240733276307

WAIT #47773847239296: nam='DFS lock handle' ela= 101160 type|mode=1128857605 id1=10 id2=2 obj#=6204 tim=1359240733377754

WAIT #47773847239296: nam='enq: PI - contention' ela= 2251 name|mode=1346961409 operation=3 serial #=229371905 obj#=6204 tim=1359240733380279

WAIT #47773847239296: nam='enq: PS - contention' ela= 1448 name|mode=1347616774 instance=3 slave ID=1 obj#=6204 tim=1359240733382029

WAIT #47773847239296: nam='DFS lock handle' ela= 1823 type|mode=1128857605 id1=10 id2=1 obj#=6204 tim=1359240733384140

WAIT #47773847239296: nam='DFS lock handle' ela= 914 type|mode=1128857605 id1=10 id2=3 obj#=6204 tim=1359240733385424

WAIT #47773847239296: nam='DFS lock handle' ela= 105135 type|mode=1128857605 id1=10 id2=2 obj#=6204 tim=1359240733490806

WAIT #47773847239296: nam='enq: PI - contention' ela= 2181 name|mode=1346961409 operation=3 serial #=229371905 obj#=6204 tim=1359240733493364

3、10391 events

luocs@LUOCS11G> alter session set events '10391 trace name context forever, level 128';

Session altered.

luocs@LUOCS11G> select count(*) from ltb1;

COUNT(*)

----------

  3560448

luocs@LUOCS11G> alter session set events '10391 trace name context off';

Session altered.

luocs@LUOCS11G> select value from v$diag_info where name = 'Default Trace File';

VALUE

----------------------------------------------------------------------------------------------------

/u01/app/oracle/diag/rdbms/luocs11g/luocs11g/trace/luocs11g_ora_3529.trc

-- trace 内容

       dumping system information

         arch:3 (shared disk with global cache affinity)

         sess:309 myiid:1 mynid:1 ninst:1 maxiid:1, mnodes:0

         Instances running on that system:

           inum:0 iid:1

       Created a node map for handling affinitized placement:

       map:0x78f3d4 #inst:1 max:32 elem:0x4d89d560

        Inst liid:0: riid:1,32- 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 1

       4, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31.

kxfrDmpUpdSys

       allocated slave set: nsset:1 nbslv:2 tinst=1 ipq=0

         Slave set 0: #nodes:1

         Min # slaves 2: Max # slaves:2

           List of Slaves:

             slv:  0 nid:0 instid:1 sid:00

             slv:  1 nid:0 instid:1 sid:01

           List of Nodes:

             node 0

4、_PX_TRACE

sys@WWW> alter session set "_px_trace"="compilation","execution","messaging";

Session altered.

sys@WWW> select /*+ parallel(test 3) */ count(*) from test;

COUNT(*)

----------

    23145

sys@WWW> alter session set "_px_trace"="none";

Session altered.

-- trace内容非常多，只抓部分并说明：

Acquired 3 slaves on 3 instances avg height=1 #set=1 qser=228533249

               P000 inst 1 spid 13085

               P000 inst 2 spid 8820

               P000 inst 3 spid 8758

2013-01-27 03:23:45.637836*:PX_Messaging:kxfp.c@10588:kxfpgsg():

       Instance(servers):

               inst=1 #slvs=1

               inst=2 #slvs=1

               inst=3 #slvs=1

kxfxcp1

       Sending parse to nprocs:3 slave_set:1

-- 前面一些instance信息，并给出后台服务器进程以及对应的OS进程号

…

Sending parse to slave set 1:

         User sqllen sent from QC = 50

         select /*+ parallel(test 3) */ count(*) from test

-- 这里可以看到我们提交的语句

…

2013-01-27 03:23:46.023484*:PX_Messaging:kxfp.c@6339:kxfpGatherSlaveStats(begin):

       q=0x894afcb0 qser=228533249

       qref=0x894af9c8 qrser=228533249 qrseq=1 mty=16 fmh=104

       qref=0x894af6e0 qrser=228533249 qrseq=1 mty=16 fmh=104

       qref=0x894aee70 qrser=228533249 qrseq=1 mty=16 fmh=72

2013-01-27 03:23:46.030395*:PX_Messaging:kxfp.c@6434:kxfpGatherSlaveStats(end):

2013-01-27 03:23:46.030395*:PX_Messaging:kxfp.c@3590:kxfpqrsod():

       del qref=0x894af9c8 q=0x894afcb0 qflg=400 qrser=228533249 qrseq=3 server=3.0 action=1 sopr=0

2013-01-27 03:23:46.030687*:PX_Messaging:kxfp.c@3762:kxfpqsrls():

       Release Slave q=0x894afcb0 qr=0x894af9c8 action=1 server=0 inst=3

2013-01-27 03:23:46.039907*:PX_Messaging:kxfp.c@3844:kxfpqsrls(): got the enq=0x90436888 in the exclusive mode

2013-01-27 03:23:46.039907*:PX_Messaging:kxfp.c@3590:kxfpqrsod():

       del qref=0x894af6e0 q=0x894afcb0 qflg=500 qrser=228533249 qrseq=3 server=2.0 action=1 sopr=0

2013-01-27 03:23:46.040262*:PX_Messaging:kxfp.c@3762:kxfpqsrls():

       Release Slave q=0x894afcb0 qr=0x894af6e0 action=1 server=0 inst=2

2013-01-27 03:23:46.041056*:PX_Messaging:kxfp.c@3844:kxfpqsrls(): got the enq=0x90436ec0 in the exclusive mode

2013-01-27 03:23:46.041056*:PX_Messaging:kxfp.c@21120:kxfpIDNDeregister():

       removing link for qc 0x894afcb0 sess 216

       removing link 0x894b0d90 for qc 0x894afcb0 on list 0

2013-01-27 03:23:46.041056*:PX_Messaging:kxfp.c@3590:kxfpqrsod():

       del qref=0x894aee70 q=0x894afcb0 qflg=500 qrser=228533249 qrseq=3 server=1.0 action=1 sopr=0

2013-01-27 03:23:46.041056*:PX_Messaging:kxfp.c@3762:kxfpqsrls():

       Release Slave q=0x894afcb0 qr=0x894aee70 action=1 server=0 inst=1

2013-01-27 03:23:46.041056*:PX_Messaging:kxfp.c@3844:kxfpqsrls(): got the enq=0x90439030 in the exclusive mode

2013-01-27 03:23:46.041056*:PX_Messaging:kxfp.c@3032:kxfpqsod_qc_sod():         all slaves released qser=228533249

2013-01-27 03:23:46.041272*:PX_Messaging:kxfp.c@3052:kxfpqsod_qc_sod():         clean up of q=0x894afcb0 completed

-- 从这里可以看到开始并行到释放的操作

…

2013-01-27 03:23:45.362780*:PX_Messaging:kxfp.c@11434:kxfpg1srv():      trying to get slave P000 on instance 1 for q=0x894afcb0

2013-01-27 03:23:45.362780*:PX_Messaging:kxfp.c@11532:kxfpg1srv():      slave P000 is local

2013-01-27 03:23:45.362780*:PX_Messaging:kxfp.c@11562:kxfpg1srv():      found dp=0x8ab08348 flg=18

2013-01-27 03:23:45.362780*:PX_Messaging:kxfp.c@11593:kxfpg1srv():      local slave already started.. sid = 0, iid = 1

2013-01-27 03:23:45.364538*:PX_Messaging:kxfp.c@10950:kxfpg1sg():       Got It. 1 so far.

2013-01-27 03:23:45.364538*:PX_Messaging:kxfp.c@11434:kxfpg1srv():      trying to get slave P000 on instance 2 for q=0x894afcb0

2013-01-27 03:23:45.366606*:PX_Messaging:kxfp.c@11477:kxfpg1srv():      slave P000 is remote (inst=2) 2013-01-27 03:23:45.366606*:PX_Messaging:kxfp.c@11500:kxfpg1srv():        - to be started

2013-01-27 03:23:45.433069*:PX_Messaging:kxfp.c@10950:kxfpg1sg():       Got It. 2 so far.

2013-01-27 03:23:45.433069*:PX_Messaging:kxfp.c@11434:kxfpg1srv():      trying to get slave P000 on instance 3 for q=0x894afcb0

2013-01-27 03:23:45.435237*:PX_Messaging:kxfp.c@11477:kxfpg1srv():      slave P000 is remote (inst=3) 2013-01-27 03:23:45.435237*:PX_Messaging:kxfp.c@11500:kxfpg1srv():        - to be started

2013-01-27 03:23:45.537281*:PX_Messaging:kxfp.c@10950:kxfpg1sg():       Got It. 3 so far.

2013-01-27 03:23:45.537281*:PX_Messaging:kxfp.c@11210:kxfpg1sg():       need to allocate qref to slaves

2013-01-27 03:23:45.537281*:PX_Messaging:kxfp.c@11218:kxfpg1sg():       qref=0x894aee70 qref.sid=0, qref.iid=1, ser=228533249 qdp.sid=0 qdp.iid=1

2013-01-27 03:23:45.537590*:PX_Messaging:kxfp.c@11210:kxfpg1sg():       need to allocate qref to slaves

2013-01-27 03:23:45.537590*:PX_Messaging:kxfp.c@11218:kxfpg1sg():       qref=0x894af6e0 qref.sid=0, qref.iid=2, ser=228533249 qdp.sid=0 qdp.iid=2

2013-01-27 03:23:45.537722*:PX_Messaging:kxfp.c@11210:kxfpg1sg():       need to allocate qref to slaves

2013-01-27 03:23:45.537722*:PX_Messaging:kxfp.c@11218:kxfpg1sg():       qref=0x894af9c8 qref.sid=0, qref.iid=3, ser=228533249 qdp.sid=0 qdp.iid=3

2013-01-27 03:23:45.537945*:PX_Messaging:kxfp.c@11298:kxfpg1sg():       wait reply from qref 0x894aee70

2013-01-27 03:23:45.540818*:PX_Messaging:kxfp.c@11307:kxfpg1sg():       received reply from qref 0x894aee70

2013-01-27 03:23:45.540818*:PX_Messaging:kxfp.c@11298:kxfpg1sg():       wait reply from qref 0x894af6e0

2013-01-27 03:23:45.571801*:PX_Messaging:kxfp.c@11307:kxfpg1sg():       received reply from qref 0x894af6e0

2013-01-27 03:23:45.571801*:PX_Messaging:kxfp.c@11298:kxfpg1sg():       wait reply from qref 0x894af9c8

2013-01-27 03:23:45.637836*:PX_Messaging:kxfp.c@11307:kxfpg1sg():       received reply from qref 0x894af9c8

       Acquired 3 slaves on 3 instances avg height=1 #set=1 qser=228533249

               P000 inst 1 spid 13085

               P000 inst 2 spid 8820

               P000 inst 3 spid 8758

2013-01-27 03:23:45.637836*:PX_Messaging:kxfp.c@10588:kxfpgsg():

       Instance(servers):

               inst=1 #slvs=1

               inst=2 #slvs=1

               inst=3 #slvs=1

-- 从以上信息可以看到获取到的并行进程信息，3个实例各自获得一个。

-- 下面再看看并行度为6的情况

sys@WWW> alter session set "_px_trace"="compilation","execution","messaging";

Session altered.

sys@WWW> select /*+ parallel(test 6) */ count(*) from test;

COUNT(*)

----------

    23145

sys@WWW> alter session set "_px_trace"="none";

Session altered.

sys@WWW> @showdop

DFO_NUMBER      TQ_ID SERVER_TYPE     PROCESS      NUM_ROWS      BYTES   INSTANCE

---------- ---------- --------------- ---------- ---------- ---------- ----------

        1          0 Producer        P000                1         36          3

        1          0 Producer        P000                1         36          1

        1          0 Producer        P001                1         36          1

        1          0 Producer        P001                1         36          3

        1          0 Producer        P002                1         36          3

        1          0 Producer        P002                1         36          1

        1          0 Consumer        QC                  6        216          1

7 rows selected.

-- 可见参与工作的只有2个实例

-- 然后我们从trace里也可以看到获取到的并行进程信息：

2013-01-27 03:40:49.503057*:PX_Messaging:kxfp.c@11434:kxfpg1srv():      trying to get slave P000 on instance 1 for q=0x894b10d0

2013-01-27 03:40:49.505184*:PX_Messaging:kxfp.c@11532:kxfpg1srv():      slave P000 is local

2013-01-27 03:40:49.505184*:PX_Messaging:kxfp.c@11562:kxfpg1srv():      found dp=0x8ab09938 flg=0

2013-01-27 03:40:49.505184*:PX_Messaging:kxfp.c@12939:kxfpcrel():

       Creating local slave 0 flg=30

2013-01-27 03:40:49.505184*:PX_Messaging:kxfp.c@12722:kxfpcre1(): Creating slave 0 flg:30

2013-01-27 03:40:49.505184*:PX_Messaging:kxfp.c@12772:kxfpcre1():       free descriptor found dp=0x8ab08348

2013-01-27 03:40:49.505184*:PX_Messaging:kxfp.c@12857:kxfpcre1():       Allocated slave P000 dp=0x8ab08348 flg=4

2013-01-27 03:40:49.546771*:PX_Messaging:kxfp.c@10950:kxfpg1sg():       Got It. 1 so far.

2013-01-27 03:40:49.546771*:PX_Messaging:kxfp.c@11434:kxfpg1srv():      trying to get slave P001 on instance 1 for q=0x894b10d0

2013-01-27 03:40:49.546771*:PX_Messaging:kxfp.c@11532:kxfpg1srv():      slave P001 is local

2013-01-27 03:40:49.546771*:PX_Messaging:kxfp.c@11562:kxfpg1srv():      found dp=0x8ab09938 flg=0

2013-01-27 03:40:49.546771*:PX_Messaging:kxfp.c@12939:kxfpcrel():

       Creating local slave 1 flg=30

2013-01-27 03:40:49.546771*:PX_Messaging:kxfp.c@12722:kxfpcre1(): Creating slave 1 flg:30

2013-01-27 03:40:49.546771*:PX_Messaging:kxfp.c@12772:kxfpcre1():       free descriptor found dp=0x8ab083d8

2013-01-27 03:40:49.546771*:PX_Messaging:kxfp.c@12857:kxfpcre1():       Allocated slave P001 dp=0x8ab083d8 flg=4

*** 2013-01-27 03:40:49.600

2013-01-27 03:40:49.599941*:PX_Messaging:kxfp.c@10950:kxfpg1sg():       Got It. 2 so far.

2013-01-27 03:40:49.599941*:PX_Messaging:kxfp.c@11434:kxfpg1srv():      trying to get slave P002 on instance 1 for q=0x894b10d0

2013-01-27 03:40:49.600886*:PX_Messaging:kxfp.c@11532:kxfpg1srv():      slave P002 is local

2013-01-27 03:40:49.600886*:PX_Messaging:kxfp.c@11562:kxfpg1srv():      found dp=0x8ab09938 flg=0

2013-01-27 03:40:49.600886*:PX_Messaging:kxfp.c@12939:kxfpcrel():

       Creating local slave 2 flg=30

2013-01-27 03:40:49.600886*:PX_Messaging:kxfp.c@12722:kxfpcre1(): Creating slave 2 flg:30

2013-01-27 03:40:49.600886*:PX_Messaging:kxfp.c@12772:kxfpcre1():       free descriptor found dp=0x8ab08468

2013-01-27 03:40:49.600886*:PX_Messaging:kxfp.c@12857:kxfpcre1():       Allocated slave P002 dp=0x8ab08468 flg=4

2013-01-27 03:40:49.659212*:PX_Messaging:kxfp.c@10950:kxfpg1sg():       Got It. 3 so far.

2013-01-27 03:40:49.659212*:PX_Messaging:kxfp.c@11434:kxfpg1srv():      trying to get slave P000 on instance 3 for q=0x894b10d0

2013-01-27 03:40:49.662577*:PX_Messaging:kxfp.c@11477:kxfpg1srv():      slave P000 is remote (inst=3) 2013-01-27 03:40:49.662577*:PX_Messaging:kxfp.c@11500:kxfpg1srv():        - to be started

2013-01-27 03:40:49.829562*:PX_Messaging:kxfp.c@10950:kxfpg1sg():       Got It. 4 so far.

2013-01-27 03:40:49.829562*:PX_Messaging:kxfp.c@11434:kxfpg1srv():      trying to get slave P001 on instance 3 for q=0x894b10d0

2013-01-27 03:40:49.832446*:PX_Messaging:kxfp.c@11477:kxfpg1srv():      slave P001 is remote (inst=3) 2013-01-27 03:40:49.832446*:PX_Messaging:kxfp.c@11500:kxfpg1srv():        - to be started

2013-01-27 03:40:50.011707*:PX_Messaging:kxfp.c@10950:kxfpg1sg():       Got It. 5 so far.

2013-01-27 03:40:50.011707*:PX_Messaging:kxfp.c@11434:kxfpg1srv():      trying to get slave P002 on instance 3 for q=0x894b10d0

2013-01-27 03:40:50.013168*:PX_Messaging:kxfp.c@11477:kxfpg1srv():      slave P002 is remote (inst=3) 2013-01-27 03:40:50.013168*:PX_Messaging:kxfp.c@11500:kxfpg1srv():        - to be started

2013-01-27 03:40:50.188632*:PX_Messaging:kxfp.c@10950:kxfpg1sg():       Got It. 6 so far.

2013-01-27 03:40:50.188632*:PX_Messaging:kxfp.c@11210:kxfpg1sg():       need to allocate qref to slaves

2013-01-27 03:40:50.188632*:PX_Messaging:kxfp.c@11218:kxfpg1sg():       qref=0x894ace68 qref.sid=0, qref.iid=1, ser=228594689 qdp.sid=0 qdp.iid=1

       qref=0x894ace68 qrser=228594689 qrseq=0 mty=7 fmh=0

2013-01-27 03:40:50.188860*:PX_Messaging:kxfp.c@11210:kxfpg1sg():       need to allocate qref to slaves

2013-01-27 03:40:50.188860*:PX_Messaging:kxfp.c@11218:kxfpg1sg():       qref=0x894b0df8 qref.sid=1, qref.iid=1, ser=228594689 qdp.sid=1 qdp.iid=1

       qref=0x894b0df8 qrser=228594689 qrseq=0 mty=7 fmh=0

2013-01-27 03:40:50.188938*:PX_Messaging:kxfp.c@11210:kxfpg1sg():       need to allocate qref to slaves

2013-01-27 03:40:50.188938*:PX_Messaging:kxfp.c@11218:kxfpg1sg():       qref=0x894af9c8 qref.sid=2, qref.iid=1, ser=228594689 qdp.sid=2 qdp.iid=1

       qref=0x894af9c8 qrser=228594689 qrseq=0 mty=7 fmh=0

2013-01-27 03:40:50.189010*:PX_Messaging:kxfp.c@11210:kxfpg1sg():       need to allocate qref to slaves

       adding link 0x894aee38 for qc 0x894b10d0 on list 0

2013-01-27 03:40:50.189010*:PX_Messaging:kxfp.c@11218:kxfpg1sg():       qref=0x894af6e0 qref.sid=0, qref.iid=3, ser=228594689 qdp.sid=0 qdp.iid=3

       qref=0x894af6e0 qrser=228594689 qrseq=0 mty=7 fmh=0

2013-01-27 03:40:50.189104*:PX_Messaging:kxfp.c@11210:kxfpg1sg():       need to allocate qref to slaves

2013-01-27 03:40:50.189104*:PX_Messaging:kxfp.c@11218:kxfpg1sg():       qref=0x894aee70 qref.sid=1, qref.iid=3, ser=228594689 qdp.sid=1 qdp.iid=3

       qref=0x894aee70 qrser=228594689 qrseq=0 mty=7 fmh=0

2013-01-27 03:40:50.189405*:PX_Messaging:kxfp.c@11210:kxfpg1sg():       need to allocate qref to slaves

2013-01-27 03:40:50.189405*:PX_Messaging:kxfp.c@11218:kxfpg1sg():       qref=0x894aeb88 qref.sid=2, qref.iid=3, ser=228594689 qdp.sid=2 qdp.iid=3

       qref=0x894aeb88 qrser=228594689 qrseq=0 mty=7 fmh=0

2013-01-27 03:40:50.189632*:PX_Messaging:kxfp.c@11298:kxfpg1sg():       wait reply from qref 0x894ace68

2013-01-27 03:40:50.208868*:PX_Messaging:kxfp.c@11307:kxfpg1sg():       received reply from qref 0x894ace68

2013-01-27 03:40:50.208868*:PX_Messaging:kxfp.c@11298:kxfpg1sg():       wait reply from qref 0x894b0df8

2013-01-27 03:40:50.208868*:PX_Messaging:kxfp.c@11307:kxfpg1sg():       received reply from qref 0x894b0df8

2013-01-27 03:40:50.208868*:PX_Messaging:kxfp.c@11298:kxfpg1sg():       wait reply from qref 0x894af9c8

2013-01-27 03:40:50.208868*:PX_Messaging:kxfp.c@11307:kxfpg1sg():       received reply from qref 0x894af9c8

2013-01-27 03:40:50.208868*:PX_Messaging:kxfp.c@11298:kxfpg1sg():       wait reply from qref 0x894af6e0

2013-01-27 03:40:50.213193*:PX_Messaging:kxfp.c@11307:kxfpg1sg():       received reply from qref 0x894af6e0

2013-01-27 03:40:50.213193*:PX_Messaging:kxfp.c@11298:kxfpg1sg():       wait reply from qref 0x894aee70

2013-01-27 03:40:50.213193*:PX_Messaging:kxfp.c@11307:kxfpg1sg():       received reply from qref 0x894aee70

2013-01-27 03:40:50.213193*:PX_Messaging:kxfp.c@11298:kxfpg1sg():       wait reply from qref 0x894aeb88

2013-01-27 03:40:50.215938*:PX_Messaging:kxfp.c@11307:kxfpg1sg():       received reply from qref 0x894aeb88

       Acquired 6 slaves on 2 instances avg height=3 #set=1 qser=228594689

               P000 inst 1 spid 20964

               P001 inst 1 spid 20966

               P002 inst 1 spid 20968

               P000 inst 3 spid 9599

               P001 inst 3 spid 9602

               P002 inst 3 spid 9604

2013-01-27 03:40:50.215938*:PX_Messaging:kxfp.c@10588:kxfpgsg():

       Instance(servers):

               inst=1 #slvs=3

               inst=3 #slvs=3

               inst=2 #slvs=0

… 部分省略

2013-01-27 03:40:50.395810*:PX_Messaging:kxfp.c@3292:kxfpqsod():

       Query end, buffer cache support for numa enabled: YES

2013-01-27 03:40:50.395810*:PX_Messaging:kxfp.c@3296:kxfpqsod(end):

2013-01-27 03:40:50.395810*:PX_Messaging:kxfp.c@3229:kxfpqsod(begin):

       q=0x894b10d0 qser=228594689 action=0x1 flg=0x400

2013-01-27 03:40:50.395810*:PX_Messaging:kxfp.c@2841:kxfpqsod_qc_sod():         q=0x894b10d0 qser=228594689 qinc=1 action=0x1 flg=0x400

2013-01-27 03:40:50.398517*:PX_Messaging:kxfp.c@6339:kxfpGatherSlaveStats(begin):

       q=0x894b10d0 qser=228594689

       qref=0x894aeb88 qrser=228594689 qrseq=1 mty=16 fmh=104

       qref=0x894aee70 qrser=228594689 qrseq=1 mty=16 fmh=104

       qref=0x894af6e0 qrser=228594689 qrseq=1 mty=16 fmh=104

       qref=0x894af9c8 qrser=228594689 qrseq=1 mty=16 fmh=72

       qref=0x894b0df8 qrser=228594689 qrseq=1 mty=16 fmh=72

       qref=0x894ace68 qrser=228594689 qrseq=1 mty=16 fmh=72

2013-01-27 03:40:50.408353*:PX_Messaging:kxfp.c@6434:kxfpGatherSlaveStats(end):

2013-01-27 03:40:50.408353*:PX_Messaging:kxfp.c@3590:kxfpqrsod():

       del qref=0x894aeb88 q=0x894b10d0 qflg=400 qrser=228594689 qrseq=3 server=3.2 action=1 sopr=0

2013-01-27 03:40:50.408508*:PX_Messaging:kxfp.c@3762:kxfpqsrls():

       Release Slave q=0x894b10d0 qr=0x894aeb88 action=1 server=2 inst=3

2013-01-27 03:40:50.411394*:PX_Messaging:kxfp.c@3844:kxfpqsrls(): got the enq=0x90436de0 in the exclusive mode

2013-01-27 03:40:50.411394*:PX_Messaging:kxfp.c@3590:kxfpqrsod():

       del qref=0x894aee70 q=0x894b10d0 qflg=500 qrser=228594689 qrseq=3 server=3.1 action=1 sopr=0

2013-01-27 03:40:50.411560*:PX_Messaging:kxfp.c@3762:kxfpqsrls():

       Release Slave q=0x894b10d0 qr=0x894aee70 action=1 server=1 inst=3

2013-01-27 03:40:50.413609*:PX_Messaging:kxfp.c@3844:kxfpqsrls(): got the enq=0x90436968 in the exclusive mode

2013-01-27 03:40:50.413609*:PX_Messaging:kxfp.c@3590:kxfpqrsod():

       del qref=0x894af6e0 q=0x894b10d0 qflg=500 qrser=228594689 qrseq=3 server=3.0 action=1 sopr=0

2013-01-27 03:40:50.413679*:PX_Messaging:kxfp.c@3762:kxfpqsrls():

       Release Slave q=0x894b10d0 qr=0x894af6e0 action=1 server=0 inst=3

2013-01-27 03:40:50.415272*:PX_Messaging:kxfp.c@3844:kxfpqsrls(): got the enq=0x90436b28 in the exclusive mode

2013-01-27 03:40:50.415272*:PX_Messaging:kxfp.c@21120:kxfpIDNDeregister():

       removing link for qc 0x894b10d0 sess 216

       removing link 0x894aee38 for qc 0x894b10d0 on list 0

2013-01-27 03:40:50.415272*:PX_Messaging:kxfp.c@3590:kxfpqrsod():

       del qref=0x894af9c8 q=0x894b10d0 qflg=500 qrser=228594689 qrseq=3 server=1.2 action=1 sopr=0

2013-01-27 03:40:50.415272*:PX_Messaging:kxfp.c@3762:kxfpqsrls():

       Release Slave q=0x894b10d0 qr=0x894af9c8 action=1 server=2 inst=1

2013-01-27 03:40:50.415272*:PX_Messaging:kxfp.c@3844:kxfpqsrls(): got the enq=0x90436ec0 in the exclusive mode

2013-01-27 03:40:50.415272*:PX_Messaging:kxfp.c@3590:kxfpqrsod():

       del qref=0x894b0df8 q=0x894b10d0 qflg=500 qrser=228594689 qrseq=3 server=1.1 action=1 sopr=0

2013-01-27 03:40:50.415272*:PX_Messaging:kxfp.c@3762:kxfpqsrls():

       Release Slave q=0x894b10d0 qr=0x894b0df8 action=1 server=1 inst=1

2013-01-27 03:40:50.415272*:PX_Messaging:kxfp.c@3844:kxfpqsrls(): got the enq=0x90436508 in the exclusive mode

2013-01-27 03:40:50.415272*:PX_Messaging:kxfp.c@3590:kxfpqrsod():

       del qref=0x894ace68 q=0x894b10d0 qflg=500 qrser=228594689 qrseq=3 server=1.0 action=1 sopr=0

2013-01-27 03:40:50.415272*:PX_Messaging:kxfp.c@3762:kxfpqsrls():

       Release Slave q=0x894b10d0 qr=0x894ace68 action=1 server=0 inst=1

2013-01-27 03:40:50.415272*:PX_Messaging:kxfp.c@3844:kxfpqsrls(): got the enq=0x90439030 in the exclusive mode

2013-01-27 03:40:50.415272*:PX_Messaging:kxfp.c@3032:kxfpqsod_qc_sod():         all slaves released qser=228594689

2013-01-27 03:40:50.415505*:PX_Messaging:kxfp.c@3052:kxfpqsod_qc_sod():         clean up of q=0x894b10d0 completed

-- 我们将parallel_force_local设置为true，再看看结果：

sys@WWW> alter session set parallel_force_local=true;

Session altered.

sys@WWW> alter table test parallel 3;

Table altered.

sys@WWW> alter session set "_px_trace"="compilation","execution","messaging";

Session altered.

sys@WWW> select count(*) from test;

COUNT(*)

----------

    23145

sys@WWW> alter session set "_px_trace"="none";

Session altered.

sys@WWW> @showdop

DFO_NUMBER      TQ_ID SERVER_TYPE     PROCESS      NUM_ROWS      BYTES   INSTANCE

---------- ---------- --------------- ---------- ---------- ---------- ----------

        1          0 Producer        P000                1         36          1

        1          0 Producer        P001                1         36          1

        1          0 Producer        P002                1         36          1

        1          0 Consumer        QC                  3        108          1

-- 可见只有本地的实例才参与并行工作

2013-01-27 03:47:24.187691*:PX_Messaging:kxfp.c@11434:kxfpg1srv():      trying to get slave P000 on instance 1 for q=0x894acbc8

2013-01-27 03:47:24.187691*:PX_Messaging:kxfp.c@11532:kxfpg1srv():      slave P000 is local

2013-01-27 03:47:24.187691*:PX_Messaging:kxfp.c@11562:kxfpg1srv():      found dp=0x8ab09938 flg=0

2013-01-27 03:47:24.187691*:PX_Messaging:kxfp.c@12939:kxfpcrel():

       Creating local slave 0 flg=34

2013-01-27 03:47:24.187691*:PX_Messaging:kxfp.c@12722:kxfpcre1(): Creating slave 0 flg:34

2013-01-27 03:47:24.187691*:PX_Messaging:kxfp.c@12772:kxfpcre1():       free descriptor found dp=0x8ab08348

2013-01-27 03:47:24.187691*:PX_Messaging:kxfp.c@12857:kxfpcre1():       Allocated slave P000 dp=0x8ab08348 flg=4

2013-01-27 03:47:24.251243*:PX_Messaging:kxfp.c@10950:kxfpg1sg():       Got It. 1 so far.

2013-01-27 03:47:24.251243*:PX_Messaging:kxfp.c@11434:kxfpg1srv():      trying to get slave P001 on instance 1 for q=0x894acbc8

2013-01-27 03:47:24.251489*:PX_Messaging:kxfp.c@11532:kxfpg1srv():      slave P001 is local

2013-01-27 03:47:24.251489*:PX_Messaging:kxfp.c@11562:kxfpg1srv():      found dp=0x8ab09938 flg=0

2013-01-27 03:47:24.251489*:PX_Messaging:kxfp.c@12939:kxfpcrel():

       Creating local slave 1 flg=34

2013-01-27 03:47:24.251489*:PX_Messaging:kxfp.c@12722:kxfpcre1(): Creating slave 1 flg:34

2013-01-27 03:47:24.251489*:PX_Messaging:kxfp.c@12772:kxfpcre1():       free descriptor found dp=0x8ab083d8

2013-01-27 03:47:24.251489*:PX_Messaging:kxfp.c@12857:kxfpcre1():       Allocated slave P001 dp=0x8ab083d8 flg=4

2013-01-27 03:47:24.306473*:PX_Messaging:kxfp.c@10950:kxfpg1sg():       Got It. 2 so far.

2013-01-27 03:47:24.306473*:PX_Messaging:kxfp.c@11434:kxfpg1srv():      trying to get slave P002 on instance 1 for q=0x894acbc8

2013-01-27 03:47:24.306473*:PX_Messaging:kxfp.c@11532:kxfpg1srv():      slave P002 is local

2013-01-27 03:47:24.306473*:PX_Messaging:kxfp.c@11562:kxfpg1srv():      found dp=0x8ab09938 flg=0

2013-01-27 03:47:24.306473*:PX_Messaging:kxfp.c@12939:kxfpcrel():

       Creating local slave 2 flg=34

2013-01-27 03:47:24.306473*:PX_Messaging:kxfp.c@12722:kxfpcre1(): Creating slave 2 flg:34

2013-01-27 03:47:24.306473*:PX_Messaging:kxfp.c@12772:kxfpcre1():       free descriptor found dp=0x8ab08468

2013-01-27 03:47:24.306473*:PX_Messaging:kxfp.c@12857:kxfpcre1():       Allocated slave P002 dp=0x8ab08468 flg=4

2013-01-27 03:47:24.369114*:PX_Messaging:kxfp.c@10950:kxfpg1sg():       Got It. 3 so far.

2013-01-27 03:47:24.369114*:PX_Messaging:kxfp.c@11210:kxfpg1sg():       need to allocate qref to slaves

2013-01-27 03:47:24.369114*:PX_Messaging:kxfp.c@11218:kxfpg1sg():       qref=0x894af158 qref.sid=0, qref.iid=1, ser=228614657 qdp.sid=0 qdp.iid=1

       qref=0x894af158 qrser=228614657 qrseq=0 mty=7 fmh=0

2013-01-27 03:47:24.369453*:PX_Messaging:kxfp.c@11210:kxfpg1sg():       need to allocate qref to slaves

2013-01-27 03:47:24.369453*:PX_Messaging:kxfp.c@11218:kxfpg1sg():       qref=0x894b0ae0 qref.sid=1, qref.iid=1, ser=228614657 qdp.sid=1 qdp.iid=1

       qref=0x894b0ae0 qrser=228614657 qrseq=0 mty=7 fmh=0

2013-01-27 03:47:24.369555*:PX_Messaging:kxfp.c@11210:kxfpg1sg():       need to allocate qref to slaves

2013-01-27 03:47:24.369555*:PX_Messaging:kxfp.c@11218:kxfpg1sg():       qref=0x894aeb88 qref.sid=2, qref.iid=1, ser=228614657 qdp.sid=2 qdp.iid=1

       qref=0x894aeb88 qrser=228614657 qrseq=0 mty=7 fmh=0

2013-01-27 03:47:24.369625*:PX_Messaging:kxfp.c@11298:kxfpg1sg():       wait reply from qref 0x894af158

2013-01-27 03:47:24.373707*:PX_Messaging:kxfp.c@11307:kxfpg1sg():       received reply from qref 0x894af158

2013-01-27 03:47:24.373707*:PX_Messaging:kxfp.c@11298:kxfpg1sg():       wait reply from qref 0x894b0ae0

2013-01-27 03:47:24.381890*:PX_Messaging:kxfp.c@11307:kxfpg1sg():       received reply from qref 0x894b0ae0

2013-01-27 03:47:24.381890*:PX_Messaging:kxfp.c@11298:kxfpg1sg():       wait reply from qref 0x894aeb88

2013-01-27 03:47:24.381890*:PX_Messaging:kxfp.c@11307:kxfpg1sg():       received reply from qref 0x894aeb88

       Acquired 3 slaves on 1 instances avg height=3 #set=1 qser=228614657

               P000 inst 1 spid 22504

               P001 inst 1 spid 22506

               P002 inst 1 spid 22508

2013-01-27 03:47:24.381890*:PX_Messaging:kxfp.c@10588:kxfpgsg():

       Instance(servers):

               inst=1 #slvs=3

-- 注意上面信息中slave P000、P001、P002 is local，而如果不激活parallel_force_local参数，我们将看到类似slave P001 is remote (inst=3)的信息。

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