[ 
http://issues.apache.org/jira/browse/DERBY-1535?page=comments#action_12423375 ] 
            
Andreas Korneliussen commented on DERBY-1535:
---------------------------------------------

I think there could be a problem here:

DRDAConnThread:
-                                               ps.setBytes(i+1, paramBytes);
+                                               ps.setBinaryStream(i+1, 
+                                                                               
   new ByteArrayInputStream(paramBytes),
+                                                       

If paramBytes is null, it would previously be interpreted by the engine as 
there is a NULL value inserted into the database.
When creating a new ByteArrayInputStream, I guess it would be interpreted as 
inserting no data into the BLOB (if the paramBytes is null), or maybe a 
NullPointerException gets thrown


> Trial 2 for DERBY-550, improve use of Engine from NetworkServer and reduce 
> memory usage
> ---------------------------------------------------------------------------------------
>
>                 Key: DERBY-1535
>                 URL: http://issues.apache.org/jira/browse/DERBY-1535
>             Project: Derby
>          Issue Type: Sub-task
>          Components: Network Server
>            Reporter: Tomohito Nakayama
>         Assigned To: Tomohito Nakayama
>         Attachments: DERBY-1513_1535.patch, DERBY-1513_1535_2.patch, 
> DERBY-1535.patch, serverMemoryUsage.xls, serverMemoryUsage_1513_1535.xls
>
>
> Through DERBY-1513, Trial 1 for DERBY-550, 
> it was suggested that NetworkServer seems to use Engine inefficiently and use 
> too much of memory.
> This task try to improve the use of Engine from NetworkServer and try to 
> reduce memory usage.

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