RE: [Jdbm-general] Transaction memory size

[Rosenberg, E. <eri...@ng...>]

Kevin,

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Thanks for such a quick response. The main reason I was trying to avoid =
committing was because committing seems to be relatively slow. If I =
disable transactions will things be written to disk immediately? Will =
this writing be faster then a commit?


Eric

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________________________________

From: Kevin Day [mailto:ke...@tr...]=20
Sent: Monday, January 16, 2006 4:02 PM
To: Rosenberg, Eric
Subject: re: [Jdbm-general] Transaction memory size

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Eric-

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This is a limitation in the current jdbm transaction manager (there is a =
group of us working on an alternate technique that will support =
arbitrarily large transactions, but that's a long way off).

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The recommended approach at this point is to either:

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A.  Commit your transactions periodically

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or

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B.  Run with transcations disabled for large inserts (understand that =
this will open you up to potential file corruption, so you only want to =
run without transactions when it is OK to lose the entire database - =
i.e. during initial data population).

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Cheers,

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- Kevin

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> If I add / update a bunch of objects in JDBM during a transaction is
everything kept in memory until I do a commit?

I am trying to add an arbitrary number of objects to JDBM and am
wondering if it is safe to add them all from a single transaction or if
I need to commit periodically to ensure that I don't run out of memory.

Thanks,
Eric


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