Change Notice
Doc-To-Help
Standard Manual
by Robelle Solutions Technology Inc.
Program and manual copyright © 1982-2009 Robelle Solutions Technology
Inc.
Permission is granted to reprint this document (but not for profit),
provided that copyright notice is given.
Qedit and Suprtool are trademarks of Robelle Solutions Technology Inc.
Other product and company names mentioned herein may be the trademarks of their
respective owners.
Robelle Solutions Technology Inc.
Suite 372, 7360 137 Street
Surrey, BC Canada V3W 1A3
Phone: 604.501.2001
Fax:
604.501.2003
E-mail:
sales@robelle.com
E-mail:
support@robelle.com
Web:
www.robelle.com
Contents
HowMessy Version 2.9 1
Overview.................................................................................................................................................... 1
Highlights in 2.9........................................................................................................................................ 1
Compatibility............................................................................................................................................ 1
Compatibility-Mode
Vs Native-Mode................................................................................................. 1
Installing HowMessy 3
Introduction.............................................................................................................................................. 3
Step 1: Restore from
the Tape.............................................................................................................. 3
Step 2: Upgrade the
Robelle Account.................................................................................................. 3
Step 3: Install the
Program..................................................................................................................... 3
Documentation........................................................................................................................................ 4
Enhancements 5
New in Version 2.9................................................................................................................................... 5
Bugs Fixed 7
Fixed in Version 2.9................................................................................................................................. 7
HowMessy answers the question, "How
messy are things inside my database?" HowMessy shows percentage
secondaries, worst cluster, highwater mark, longest chains, average chains,
blocks per chain, percentage inefficient pointers, and deviation from maximum
efficiency. With this information, you can decide what database changes might
improve performance: increase or decrease capacity, add or delete paths, remove
sort fields, alter primary paths, or repack a dataset along the primary path.
·
HowMessy now supports databases
with that utilize the new limits of 1200 items, 240 datasets and 64 pasts from
a master.
·
HowMessy will report an error
if an attempt to analyze a database that has been converted or built with the
new entrynumber format.
·
HowMessy would fail with a
Speed Demon prefetch error on small datasets that had a block size that was not
on a 128 word boundary.
·
HowMessy would fail on certain
older versions of Image and the CM version would fail on Classic machines.
HowMessy is compatible with Q-Delta-2,
R-MIT, T-MIT, U-MIT, V-MIT, MPE XL, and MPE/iX 6.0, 6.5, 7.0 and 7.5.
Throughout this change notice and the
HowMessy documentation there are references to compatibility-mode and native-mode. If you are on a Classic HP 3000 (i.e., not
MPE/iX), you use the compatibility-mode version of HowMessy. Our installation job streams will
automatically install the correct version for your machine. We use the terms
MPE XL and MPE/iX interchangeably in our documentation.
The HowMessy program and help files come
with Qedit and/or Suprtool and are installed automatically with those releases.
The HowMessy documentation is available
in Adobe Acrobat PDF format for easy printing, You will find these files on the
Robelle website at http://www.robelle.com/library/manuals/.
HowMessy now supports databases that
utilize the new limits in Image (version C.09.00) of 1200 items, 240 datasets
and 64 paths from a master.
HowMessy prints an error if an attempt is
made to analyze a database in entrynumber format. Since these databases do not
keep records in blocks, it does not make sense to analyze these databases using
the current calculation within HowMessy.
The CM version of HowMessy would fail on
Classic machines and the native version would fail with a dbinfo error on old
versions of Image.
HowMessy would fail with a Speed Demon
prefetch error on small databases that had a block size that was not on a 128
word boundary.