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Peter, thanks for the minumum setting recommendation.

I tried running with the min settings you sent me, but was getting null pointer
exceptions:

 java.sql.SQLException: java.lang.IndexOutOfBoundsException
 at org.enhydra.instantdb.jdbc.idbConnection.<init>(idbConnection.java:88)
 at org.enhydra.instantdb.jdbc.idbDriver.connect(idbDriver.java:40)
 at java.sql.DriverManager.getConnection(DriverManager.java:517)
 at java.sql.DriverManager.getConnection(DriverManager.java:177)
<snip>


So I increased

systemCacheSize=100 (was 0)

Which got past the first null pointer exception, but now I get this one
(IndexOutOfBoundsException):

Enhydra InstantDB - Version 3.26 beta 2
The Initial Developer of the Original Code is Lutris Technologies Inc.
Portions created by Lutris are Copyright (C) 1997-2001 Lutris Technologies, Inc.
All Rights Reserved.
AWT-EventQueue-0 Opening database db/App/App.prp opens=0
AWT-EventQueue-0 Closing database App opens=1
Database App is shutting down...
Database App shutdown complete.
AWT-EventQueue-0 Opening database db/App/App.prp opens=0
AWT-EventQueue-0 Opening database db/App/App.prp opens=1
AWT-EventQueue-0 Opening database db/App/App.prp opens=2
AWT-EventQueue-0 Closing database App opens=3
AWT-EventQueue-0 Opening database db/App/App.prp opens=2
AWT-EventQueue-0 Closing database App opens=3
AWT-EventQueue-0 Opening database db/App/App.prp opens=2
AWT-EventQueue-0 Closing database App opens=3
AWT-EventQueue-0 Closing database App opens=2
AWT-EventQueue-0 Opening database db/App/App.prp opens=1
AWT-EventQueue-0 Closing database App opens=2
AWT-EventQueue-0 Opening database db/App/App.prp opens=1
AWT-EventQueue-0 Closing database App opens=2
AWT-EventQueue-0 Opening database db/App/App.prp opens=1
AWT-EventQueue-0 java.sql.SQLException: java.lang.IndexOutOfBoundsException

java.sql.SQLException: java.lang.IndexOutOfBoundsException
 at org.enhydra.instantdb.db.SQLProg.execute(SQLProg.java:288)
 at
org.enhydra.instantdb.jdbc.idbPreparedStatement.execute(idbPreparedStatement.java:92)

 at
org.enhydra.instantdb.jdbc.idbPreparedStatement.executeQuery(idbPreparedStatement.java:59)

I'm tinkering with the other settings, but can't seem to get past this
IndexOutOfBoundsException.  I have tried this with 3.25 and 3.26b - same
results.  If I revert back to the original settings, everything works.  I'll keep
tinkering away, and if anyone has any input it would be appreciated!

Thanks, Jason



Peter Hearty wrote:

> Jason
>
> The following properties can be adjusted to vary the sizes of internal
> buffers and caches. The values that follow sets everything to pretty much
> minimum values. I haven't tried these out. If they give any problems then
> try increasing them slightly. Their meanings are described in:
>
> http://instantdb.enhydra.org/software/documentation/idb3_26b2/props.html
>
> cacheAmount=0
> cacheCondition=CACHE_ROWS
> systemCacheSize=0
> systemCacheCondition=CACHE_ROWS
> resultsOnDisk=1
> resultsSetCache=CACHE_ROWS
> resultsSetCacheAmount=0
> rowCacheSize=16
> singleRowCount=0
> systemRows=0
> controlColCacheSize=16
> traceLevel=0
>
> In addition, if you want IDB to do garbage collection (3.26 beta 2 only)
> then set:
>
> garbageCollectStatements=10
> garbageCollectPercent=70
>
> Also, if the data is read only, then set:
>
> transLevel=0
>
> Regards
>
> Pete
>
> --
>
> Peter Hearty                         peter.hearty@lutris.com
> Lutris Technologies (UK)        http://www.lutris.com
> ----- Original Message -----
> From: "Jason Amy" <jason@cafesoft.com>
> To: <InstantDB@enhydra.org>
> Sent: Friday, January 26, 2001 5:06 PM
> Subject: InstantDB: InstantDB optimizations
>
> > Hello,
> >
> > I looked in the mail archives for information regarding my question, but
> > could find none, so here goes:
> >
> > We have an application that runs on a users desktop.  The application
> > has 'plugins' which are pieces of code that we can write that seamlessly
> > plugin to the main app.  One of these plugins uses InstantDB.  Our
> > problem lies in when a particular plugin starts, it runs queries on a
> > single InstantDB database.  This database has 10 tables, and all the
> > tables combines are .97 megabyte.  None of the tables has more than 7
> > columns, and an average of about I'd say 50 rows.  Most data is of type
> > char(10) (My SQL syntax may be off, but they're mostly small strings).
> > We are noticing a 'jump' in memory usage when the plugin is initialized
> > (actually our client has mentioned this memory spike).  Using
> > OptimizeIt! I have noticed the largest consumer of memory to be the
> > byte[] and char[].  The spike is between 4 and 5 megs (we are trying to
> > keep this down to less than 2 megs).  I have changed some of the
> > optimization settins in the .prp file (namely the resultsOnDisk to = 1),
> > but do not seem to notice much difference.  If someone out there has
> > come across this problem, or can enlighten me, it would be greatly
> > appreciated!
> >
> > -Thanks, Jason
> >
> > --------------------------------------------------------------------------
> ---
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> >
>
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