msgmap: tmp_clone: use MEMORY journal upon reconnect

Since reindexing releases the DB handle every indexBatchSize bytes,
we need to ensure we keep the journal in-memory when reopening
the DB since this is throwaway data.

diff --git a/lib/PublicInbox/Msgmap.pm b/lib/PublicInbox/Msgmap.pm
index c85e7796cbd4512f2c286628a4eff8f04aed9388..eee8d6ca58b96adbb46746c1c23c848154ee804c 100644 (file)
--- a/lib/PublicInbox/Msgmap.pm
+++ b/lib/PublicInbox/Msgmap.pm
@@ -248,6 +248,7 @@ sub atfork_parent {
        $self->{dbh} and die 'BUG: tmp_clone dbh not prepared for parent';
        defined($self->{filename}) or die 'BUG: {filename} not defined';
        $self->{dbh} = PublicInbox::Over::dbh_new($self, 2);
+       $self->{dbh}->do('PRAGMA journal_mode = MEMORY');
 }
 
 sub atfork_prepare {