Re^2: std dev calculations slow over time

by punkish (Priest)

on Oct 22, 2006 at 19:02 UTC ( [id://579889]=note: print w/replies, xml )

Need Help??

brian d foy doth spake

>I see you have some commit calls in there, but
>I didn't see where you set up a transaction.

  my $dbh = DBI->connect(
    "dbi:SQLite:$dsn", '','', { RaiseError => 1, AutoCommit => 0 }
  ) or die "$DBI::errstr\n";
[download]

I also used Devel::Profiler to do some investigating, but dprofpp tmon.out kept on croaking on me with

>dprofpp tmon.out
Modification of non-creatable array value attempted, subscript -1 at C
+:\Perl\bin/dprofpp.bat line 717, <fh> line 1250.
[download]

so I gave up that route because I really didn't know wtf that was all about.

--

when small people start casting long shadows, it is time to go to bed

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Re^3: std dev calculations slow over time by AK108 (Friar) on Oct 22, 2006 at 21:25 UTC
Transactions (in any database support by DBI) are handled with the `$dbh->begin_work` and `$dbh->commit` methods. See the "transactions" section of DBI.pm.	[reply]
Re^3: std dev calculations slow over time by randyk (Parson) on Oct 22, 2006 at 23:09 UTC
`my $dbh = DBI->connect( "dbi:SQLite:$dsn", '','', { RaiseError => 1, AutoCommit => 0 } ) or die "$DBI::errstr\n";` I found with Win32 ActivePerl that explicitly setting `$dbh->{AutoCommit} = 0;` here helps.	[reply]

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