From: Eric Wong <e@yhbt.net>
Date: Sun, 10 May 2020 22:37:14 +0000 (+0000)
Subject: msgmap: use TRUNCATE for journal_mode, for now
X-Git-Tag: v1.6.0~504
X-Git-Url: http://www.git.stargrave.org/?a=commitdiff_plain;h=78888d36fb80889f6b0f8ca6f26edda145c14238;p=public-inbox.git

msgmap: use TRUNCATE for journal_mode, for now

It avoids I/O on the directory itself, which could prolong
the lifetime of the storage device.
---

diff --git a/lib/PublicInbox/Msgmap.pm b/lib/PublicInbox/Msgmap.pm
index 9523752e..5fe14383 100644
--- a/lib/PublicInbox/Msgmap.pm
+++ b/lib/PublicInbox/Msgmap.pm
@@ -48,6 +48,10 @@ sub new_file {
 
 	if ($writable) {
 		create_tables($dbh);
+
+		# TRUNCATE reduces I/O compared to the default (DELETE)
+		$dbh->do('PRAGMA journal_mode = TRUNCATE');
+
 		$dbh->begin_work;
 		$self->created_at(time) unless $self->created_at;