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From: Eric Wong <e@80x24.org>
To: meta@public-inbox.org
Subject: [PATCH 2/5] lei_to_mail: limit workers for text, reply and v2 outputs
Date: Sat, 30 Oct 2021 08:11:41 +0000	[thread overview]
Message-ID: <20211030081144.1080-3-e@80x24.org> (raw)
In-Reply-To: <20211030081144.1080-1-e@80x24.org>

"text" and "reply" outputs are intended for the pager, so
parallelizing them is a waste of resources.

v2 has shards, of course, so parallelizing writes to it
is also a waste since the deduplication work is a bit
more complex.
---
 lib/PublicInbox/LeiQuery.pm  | 2 +-
 lib/PublicInbox/LeiToMail.pm | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/PublicInbox/LeiQuery.pm b/lib/PublicInbox/LeiQuery.pm
index 3d0e5b144d3a..352ee60131aa 100644
--- a/lib/PublicInbox/LeiQuery.pm
+++ b/lib/PublicInbox/LeiQuery.pm
@@ -37,7 +37,7 @@ sub _start_query { # used by "lei q" and "lei up"
 			$lms->lms_write_prepare->lms_pause; # just create
 		}
 	}
-	$l2m and $l2m->{-wq_nr_workers} = $mj //
+	$l2m and $l2m->{-wq_nr_workers} //= $mj //
 		int($nproc * 0.75 + 0.5); # keep some CPU for git
 
 	# descending docid order is cheapest, MUA controls sorting order
diff --git a/lib/PublicInbox/LeiToMail.pm b/lib/PublicInbox/LeiToMail.pm
index 83f58a29405b..90db30e53089 100644
--- a/lib/PublicInbox/LeiToMail.pm
+++ b/lib/PublicInbox/LeiToMail.pm
@@ -415,11 +415,13 @@ sub new {
 		require PublicInbox::LeiViewText;
 		$lei->{lvt} = PublicInbox::LeiViewText->new($lei, $fmt);
 		$self->{base_type} = 'text';
+		$self->{-wq_nr_workers} = 1; # for pager
 		@conflict = qw(mua save);
 	} elsif ($fmt eq 'v2') {
 		die "--dedupe=oid and v2 are incompatible\n" if
 			($lei->{opt}->{dedupe}//'') eq 'oid';
 		$self->{base_type} = 'v2';
+		$self->{-wq_nr_workers} = 1; # v2 has shards
 		$lei->{opt}->{save} = \1;
 		$dst = $lei->{ovv}->{dst} = $lei->abs_path($dst);
 		@conflict = qw(mua sort);

  parent reply	other threads:[~2021-10-30  8:11 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-30  8:11 [PATCH 0/5] lei: fix various SIGPIPE problems Eric Wong
2021-10-30  8:11 ` [PATCH 1/5] lei: do not access {sock} after SIGPIPE Eric Wong
2021-10-30  8:11 ` Eric Wong [this message]
2021-10-30  8:11 ` [PATCH 3/5] lei_xsearch: quiet error message on SIG{PIPE,TERM} Eric Wong
2021-10-30  8:11 ` [PATCH 4/5] lei_to_mail: avoid SEGV on worker exit via SIGTERM Eric Wong
2021-10-30  8:11 ` [PATCH 5/5] doc: lei-security: add a note about core dumps Eric Wong

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