Listers,

I have three system processes (Pin #61, #62 & #63) that are doing a
large amount of I/Os (writes).  Below is a listing from SOS of the
stack trace of one of the pins (Pin #61).  The other pins have the
same stack trace.  Any ideas?

What is Pin #63 attempting to accomplish?  Is it related to the SQE
heartbeat problem with DTCs?  The I/Os are strickly Writes and
sometimes large numbers are displayed (> 1200/sec).

SOS/3000 f.02b(c) LPS  TUE, FEB 27, 2001,  5:58 PM   E: 01:57:27   I: 00:05
      Total Busy: 10.2%   High Pri:  4.6%   MemMgr:   .7%   Read Hit: 83%
+===========-=================== Process Detail ===========-===================+
|PIN :   61 | Prog:                           | Pri: AL13  |     Switches      |
|Sess: none | User: <system process>          | Type:   NM | CM->NM    0(  0/s)|
|Ldev:      | Fath:   1   Bro:  62   Son:     | CM%:  0[ 0]| NM->CM    0(  0/s)|
|======== CPU Usage =========-================+ Disc I/O Usage ================|
|System % :      .2  [  1.1] | I/Os Total :    92[413421]   Rate Total:  19/sec|
|Ms Used  :      60[1163264] |      Reads :     0[    10]        Read :   0/sec|
|Per Trans:        [       ] |      Writes:    92[413411]        Write:  19/sec|
|=== Response/Transactions ==+=============== Process Wait States =============|
|Prompt Resp:     -  [   - ] | CPU:  1[ 7]  Mem:  [ 2]  Dsc:16[  ]  Imp: <[  ] |
|First Resp :     -  [   - ] | Pre:  <[ 1]  RIN:  [  ]  TWr:  [  ]  BIO:  [  ] |
|Trans Count:      0 [    0] | Tim:   [  ]  FS :  [  ]  Msg:82[16]  Oth: 1[  ] |
|Trans/min  :      0 [    0] | Current Wait: Memory manager post wait          |
+========================= Process Stack Trace Markers ========================+
       PC=a.0017770c enable_int+$2c
NM* 0) SP=416445b0 RP=a.002bcb98 notify_dispatcher.block_current_process+$324
NM  1) SP=416445b0 RP=a.002bf03c notify_dispatcher+$264
NM  2) SP=41644530 RP=a.001a7f14 wait_for_active_port+$170
NM  3) SP=41644430 RP=a.001a8d80 receive_from_port+$7a4
NM  4) SP=416443b0 RP=a.0035d7e4 extend_receive+$494
NM  5) SP=416441b0 RP=a.0031a640 freeze_tim+$5e8
NM  6) SP=41644070 RP=a.0028bcc8 xm_freeze+$98
NM  7) SP=41643d70 RP=a.002bcb8c notify_dispatcher.block_current_process+$318
NM  8) SP=41643cf0 RP=a.002bf03c notify_dispatcher+$264
NM  9) SP=41643c70 RP=a.001a7e90 wait_for_active_port+$ec
NM  a) SP=41643b70 RP=a.001a8b20 receive_from_port+$544
NM  b) SP=41643af0 RP=a.0035d7e4 extend_receive+$494
NM  c) SP=416438f0 RP=a.0101ba78 xm_w_commitrecord+$1a4
NM  d) SP=416437b0 RP=a.010180e0 xm_end_system_trans+$33c
NM  e) SP=416436b0 RP=a.0048a2b0 sm_pin_eof+$3dc
NM  f) SP=416435b0 RP=a.005e2fd8 sm_write_eof+$ac
NM 10) SP=41643470 RP=a.005e31c8 sm_cntl+$d0
NM 11) SP=416433f0 RP=a.00c31b00 tm_control_common+$c70
NM 12) SP=41643330 RP=a.00bf8f64 tm_ord_fix_buf_disc+$250
NM 13) SP=41643270 RP=a.00eaa950 fcontrol_nm+$d78
NM 14) SP=416431b0 RP=a.00ea9ba4 ?fcontrol_nm+$8
         export stub: a.00eab10c FCONTROL+$50
NM 15) SP=41642db0 RP=a.00eab088 ?FCONTROL+$8
         export stub: a.0199b40c tio_dtcm.p_write_eof+$f0
NM 16) SP=41642d30 RP=a.019c6f1c tio_dtcm.x_log+$638
NM 17) SP=41642cb0 RP=a.019cc1a0 tio_dtcm+$42a0
NM 18) SP=416424f0 RP=a.019c7eec ?tio_dtcm+$8
         export stub: a.0038f5d8 io_receive+$ac
NM 19) SP=41642370 RP=a.00393554 io_mgr_process+$33c
NM 1a) SP=416422f0 RP=a.0052fa68 outer_block+$14c
NM 1b) SP=41642130 RP=a.00000000
     (end of NM stack)
Enter Command:



Thank you!!!

Tom Renz