Memory used by SQL Developer

Hello
I was running a query with output of around 9 lakh records. I did this with Toad earlier and now I tried with SQL Developer.
I found a difference like this.
When in toad the records were being fetched the memory used by Toad was not getting increased as shown in the Task manager processes. While the PF Usage was getting increased which I understand is SWAP file. When all the rows were received this increase was approximately same as the file I created after exporting that data.
In case of SQL Developer the memory used by SQL developer itself goes on increasing.
Will this have impact on machines actual RAM being used ?
or In other words is Toad using swap memory directly rather than consuming RAM for saving file output ?
Regards
Sanjeev

I believe the difference could be that toad fetches each record and automatically flushes it to the output file while SQL Developer might keep all the records in memory or use a different file handling method. Basically what you said sounds as a reasonable assumption.

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