[pybsddb] DB read problem from thread

[anurag uniyal]

Thanks.

I am using version 4.4.2.

DB_THREAD does solves the problem but it becomes too slow.

For time being I am using DB_THREAD, with my own thread locking around calls to db, and it does speed up a bit.

rgds
Anurag


----- Original Message ----
From: Jesus Cea <jcea at argo.es>
To: Python bindings for Oracle Berkeley DB <pybsddb at argo.es>
Sent: Monday, 7 April, 2008 11:23:48 PM
Subject: Re: [pybsddb] DB read problem from thread

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anurag uniyal wrote:
| Do anybody has a clue what I am doing wrong here?
| I suppose bsddb3 DB can be accessed from mutiple threads?
| or do I need to specifically set DB_THREAD flag? though with
| db.DB_THREAD it hangs on some mutex?

If you reuse an environment/db handle in multiple threads, you *MUST*
open them with the DB_THREAD flag. You could open a new environment/db
handle per thread, nevertheless.

The hang you are seeing in this case (DB_THREAD) would be a bug in
Berkeley DB. What version are you using?. Some releases of 4.6.* are
very buggy. Try last build, 4.6.21.

Please, post your results.

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