800xA IM message log alarm list display error
HI all,
I have a problem displaying an IM message log alarm list.
Often the event/alarm list does not display the last messages
but the time of the first message displayed corresponds to
events happened 1-2 hours before the current time.
This system is a 800xA ver. 5.1 rev A.
The problem appears randomly especially when I call the Message log list
within a operator workplace and it is increased if I make some string search within the list.
If I call the same list from the Plant Explorer it is ok.
Thanks for help.
PB
I have a problem displaying an IM message log alarm list.
Often the event/alarm list does not display the last messages
but the time of the first message displayed corresponds to
events happened 1-2 hours before the current time.
This system is a 800xA ver. 5.1 rev A.
The problem appears randomly especially when I call the Message log list
within a operator workplace and it is increased if I make some string search within the list.
If I call the same list from the Plant Explorer it is ok.
Thanks for help.
PB
Asked 6 months ago
Answers
0
Random usually means according to the server you are connecting to. Are you using load balancing ? Try to open the same list with the same account but on each aspect. Maybe the redundant is only done every day. There is a setting for this update delay.
Answered 6 months ago
0
The IM message log connection provides near online events.
Events from the last couple of minutes may not be shown due to the cyclic IM event log refresh (IIRC taking place every 90th second).
An event list making use of the IM message retrieval mechanism never update after initial refresh. Hence it "should" be drawn with red/yellow zig-zag border, but it is not...
Retrieval of events from IM message logs may require "full table scans" if search criteria (e.g. object name, attribute, etc) is applied. Searching a large Oracle database table without indexing may take significant amounts of time. IM logs may store up to 12 million events.
The best performance is reached if you:
a) add indexes as you find necessary (to the cost of additional disk space and less performance during insert).
b) retrieve events via true Oracle database connections (and not 800xA event lists).
Read more in:
- IM Configuration Manual, 3BUF001092-610
- IM Database and Reports Manual, 3BUF001094-610
Smart Client has an accelerated event storage with more and better indexing options available.
Events from the last couple of minutes may not be shown due to the cyclic IM event log refresh (IIRC taking place every 90th second).
An event list making use of the IM message retrieval mechanism never update after initial refresh. Hence it "should" be drawn with red/yellow zig-zag border, but it is not...
Retrieval of events from IM message logs may require "full table scans" if search criteria (e.g. object name, attribute, etc) is applied. Searching a large Oracle database table without indexing may take significant amounts of time. IM logs may store up to 12 million events.
The best performance is reached if you:
a) add indexes as you find necessary (to the cost of additional disk space and less performance during insert).
b) retrieve events via true Oracle database connections (and not 800xA event lists).
Read more in:
- IM Configuration Manual, 3BUF001092-610
- IM Database and Reports Manual, 3BUF001094-610
Smart Client has an accelerated event storage with more and better indexing options available.
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