[pybsddb] Closing a large read only btree takes a long time - possible to use DB_NOSYNC?

[Chris Mulligan]

First, please accept my apologies for the long delay in returning to
this discussion. 

Second, it looks like I was wrong in the end. The issue was with the
class someone else on the team wrote. The original code looks like this,
and the issue should be obvious, it reads the entire b-tree just to
check if it exists. (self._db = bsddb.btopen())

def close(self):
    if self._db:
        self._db.close()
        self._db = None

It's been replaced with:
def close(self):
    try:
        needToClose = self._db.isOpen()
    except AttributeError:
        needToClose = False
    if needToClose:
        self._db.close()
        self._db = None

This reduced one job I was running from ~120 minutes to ~15 minutes.

-----Original Message-----
From: pybsddb-bounces at argo.es [mailto:pybsddb-bounces at argo.es] On Behalf
Of Jesus Cea
Sent: Wednesday, March 26, 2008 7:00 PM
To: Python bindings for Oracle Berkeley DB
Subject: Re: [pybsddb] Closing a large read only btree takes a long time
- possible to use DB_NOSYNC?

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Chris Mulligan wrote:
| I'm working on a test case now, I'll send you the code in a couple
hours
| when I've confirmed it "works".

In a couple of hours I should be sleeping, but I will look at it
tomorrow :).

Currently investigating a memory corruption in last pybsddb development
version :). So much to do, so little time... :)

- --
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