disk resident Ntuples

GALYARDT@acdft1.fnal.gov
Mon, 6 Jul 1998 16:26:25 -0500

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Previous message: Witold Przygoda: "Re: How to link with GEANT part of ROOT (2)"

I am having a bit of trouble creating a proper disk
resident Ntuple. I used TFile to create a file before I
created the Ntuple, which should have made the Ntuple
disk resident, according to my understanding. I set the
buffer size of the Ntuple at 16000 Kb, and still, I could
watch my DAQ program eat all of the RAM and swap space on
the Red Hat Linux 5.0 PC I'm working on (the machine has
more than 16 Mb of RAM). If I let the program continue,
filling 128 variables with each run, it gives an error
before the completion of 100 runs:

Fatal in <operator new>: storage exhausted
aborting

Suggestions?

Previous message: Witold Przygoda: "Re: How to link with GEANT part of ROOT (2)"