HP OpenVMS Systems

I/O, $qiow, exceeded quota? (EXQUOTA)

» close window

The Question is:

 
Fortran Call to QIOW returns the following error on a read with the buffer
size set over 1024 (2048) The executing user account has sufficient quotas
assigned.  This application works OK on a similar system.
 
Exceeded quota
Symbolic stack dump follows
module name     routine name                     line       rel PC    abs PC
 
PLREAD          PLREAD                           1797      0000006D
0000274D
DCNCOMFHOUR     DCNCOMFHOUR                        66      000000E4
00001C44
POLL63$MAIN     POLL63$MAIN                       139      000001C1
00000DC1
                                                           000040C1
000040C1
                                                           0000367E
0000367E
                                                           0000409C
0000409C
 

The Answer is :

 
  Check the system parameter MAXBUF. It needs to be set to a value larger
  than your buffer size, though exactly how much larger depends on the
  particular device you are issuing the I/O to.  For example, terminal
  devices can require an additional 112 bytes (or more).  You must also
  ensure the process has sufficient process BYTLM and BIOLM quota.
 
  Note than MAXBUF is a dynamic system parameter and can be changed
  without a reboot.  Use a sequence similar to the following:
 
  Older OpenVMS releases:
 
    $ RUN SYS$SYSTEM:SYSGEN
    SYSGEN>  USE ACTIVE
    SYSGEN>  SET MAXBUF 10000
    SYSGEN>  WRITE ACTIVE
 
  More recent OpenVMS releases:
 
    $ RUN SYS$SYSTEM:SYSMAN
    SYSMAN> PARAMETERS USE ACTIVE
    SYSMAN> PARAMETERS SET MAXBUF 10000
    SYSMAN> PARAMETERS WRITE ACTIVE
 
  Either of the above sequences will reset the value of MAXBUF temporarily,
  and the current value will revert to the old value after the next system
  reboot.  If you find you need to raise the value of MAXBUF, you must also
  add or update an entry for MAXBUF in MODPARAMS.DAT and then run an AUTOGEN
  pass through (at least) the SETPARAMS phase.
 
  Also remember to check the error messages and recovery documentation in
  the OpenVMS manual set.  On OpenVMS systems with the message help library
  available (V6 and later releases), you can use the following command to
  retrieve this error message and recovery documentation directly on-line:
 
$ HELP/MESSAGE EXQUOTA
 
 EXQUOTA,  process quota exceeded
 
  Facility:     SYSTEM, System Services
 
  Explanation:  An image could not continue executing or a command could
                not execute because the process exceeded one of its resource
                quotas or limits.
		...
                This message may also occur if the size of a buffered I/O
                request exceeds the value of the SYSGEN parameter MAXBUF.
 

  

     

     
answer written or last revised on ( 9-DEC-1999 )
     
» close window