user/dev discussion of public-inbox itself
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* [PATCH] msgmap: disable CoW for tmp_clone, too
@ 2020-07-29 21:25 Eric Wong
  0 siblings, 0 replies; only message in thread
From: Eric Wong @ 2020-07-29 21:25 UTC (permalink / raw)
  To: meta

The temporary clone starts as large as the full msgmap
and deletes will write to it randomly.  So ensure it
doesn't get fragmented and slower as time goes on.
 lib/PublicInbox/ | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/PublicInbox/ b/lib/PublicInbox/
index 51b6a68c..c85e7796 100644
--- a/lib/PublicInbox/
+++ b/lib/PublicInbox/
@@ -14,6 +14,7 @@ use DBI;
 use DBD::SQLite;
 use File::Temp qw(tempfile);
 use PublicInbox::Over;
+use PublicInbox::Spawn;
 sub new {
 	my ($class, $git_dir, $writable) = @_;
@@ -50,6 +51,7 @@ sub new_file {
 sub tmp_clone {
 	my ($self, $dir) = @_;
 	my ($fh, $fn) = tempfile('msgmap-XXXXXXXX', EXLOCK => 0, DIR => $dir);
+	PublicInbox::Spawn::set_nodatacow(fileno($fh));
 	my $tmp;
 	if ($self->{dbh}->can('sqlite_backup_to_dbh')) {
 		$tmp = ref($self)->new_file($fn, 2);

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2020-07-29 21:25 [PATCH] msgmap: disable CoW for tmp_clone, too Eric Wong

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