On Wed, 04 Dec 2002 15:44:35 +1100
Ashley Smith <[EMAIL PROTECTED]> wrote:
> We have been having some major printing problems this year, and
> nothing highlights it more than the speed of jobs with accounting on
> vs. no accounting. We are using Lexmark Optra T616's in computing
> laboratories, I have a Lexmark Optra T622 a few feet away I am using
> for testing. We are using lprng 3.8.15 and ifhp 3.5.10. When
> accounting is off, printing two, three page jobs from windows via lpd
> takes 25 seconds from pressing print to the last page coming out. With
> accounting on, the same test takes 1min, 19 seconds.
> Phew. So, my question is - what is the cause of the long pauses
> in printing when accounting is on? And, what can I do to
> further diagnose or fix the problem?
Check the values for the following settings:
pagecount_poll_start
pagecount_poll_end
pagecount_poll_interval
By reducing the interval length, or changing the start/end values (number of times
page counts are queried to ensure the job is done), you will reduce these delays.
Some printers are SLOW about updating their pagecounts, often not updating the
pagecount until all paper has been spewed out of the printer. In some cases, not
until the the paper is done >AND< TCP connection is dropped (check the archives for
how I know this...search on "Xerox")
FWIW: I have found monitoring the printer via SNMP to detect end-of-job, then pulling
the pagecount via SNMP, to significantly reduce the lag between jobs. This is a
little more complex to set up, though.
(Perhaps Patrick will unveil SNMP query support in the next ifhp release! He's been
threatening to include it for some time now. :)
============================================================================
John Perkins | University of Wisconsin-Madison
Associate Researcher | Department of Computer Science
[EMAIL PROTECTED] | 1210 W. Dayton St.
608-262-0438/608-262-9997 FAX | Madison, WI 53706-1685
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