I don't know about UV but in UD, LIST.QUEUE shows waiters.
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Charles Stevenson
Sent: Monday, October 24, 2011 5:12 PM
To: U2 Users List
Subject: [U2] [UV] LIST.READU EVERY's "waiters" when there are writes w/o
explicit readu.
UV 10.2.10 on Windows is behaving differently from what I recall.
Are my expectations out of line?
Suppose Session A holds a readu lock; and Session B attempts a WRITE to
same record withOUT!!! 1st explicitly getting the readu lock.
Session B waits for Session A to release the lock before writing the record.
While Session B is waiting, does it show up as a "waiter" in LIST.READU
EVERY?
I expected so, but it doesn't.
Session A Session B
_____________________________ ___________________
1A. ED VOC DUMMY
(this sets the readu lock.)
2A. (stay in editor) 2B. run this:
01: OPEN 'VOC' TO F ELSE STOPM
'nope'
02: ***READU REC FROM F, 'DUMMY'
ELSE NULL
03: WRITE '' TO F, 'DUMMY'
3A. Within ED:
XEQ LIST.READU EVERY
If I UN-comment line 2, LIST.READU EVERY shows something like this:
Active Read Waiters: Owner Waiter
Device.... Inode.... Userno Userno
746117947 232860913 6116 3396
But when I comment out line 2, LIST.READU is silent.
I have not yet explored what the deadlock daemon does.
TIA,
cds
P.S. Yes, yes, "Bad Form", "Legacy Software", 20 min wait is
configurable, . . . we can talk later.
_______________________________________________
U2-Users mailing list
[email protected]
http://listserver.u2ug.org/mailman/listinfo/u2-users
________________________________
Dave Davis
Team Lead, R&D
P: 614-875-4910 x108
F: 614-875-4088
E: [email protected]
[http://www.harriscomputer.com/images/signatures/HarrisSchools.gif]
[http://www.harriscomputer.com/images/signatures/DivisionofHarris.gif]<http://www.harriscomputer.com/>
6110 Enterprise Parkway
Grove City, OH
43123
www.harris-schoolsolutions.com<http://www.harris-schoolsolutions.com>
This message is intended exclusively for the individual or entity to which it
is addressed. This communication may contain information that is proprietary,
privileged or confidential or otherwise legally exempt from disclosure. If you
are not the named addressee, you are not authorized to read, print, retain,
copy or disseminate this message or any part of it. If you have received this
message in error, please notify the sender immediately by e-mail and delete all
copies of the message.
_______________________________________________
U2-Users mailing list
[email protected]
http://listserver.u2ug.org/mailman/listinfo/u2-users
