user/dev discussion of public-inbox itself
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From: Eric Wong <e@yhbt.net>
To: meta@public-inbox.org
Subject: [PATCH] grok-pull.post_update_hook: favor --sequential-shard for HDD
Date: Thu, 13 Aug 2020 08:04:04 +0000
Message-ID: <20200813080404.27513-1-e@yhbt.net> (raw)

--sequential-shard offers better performance on HDD than -j0
since the on-disk active set can be kept small (with -j $HIGH_NUM).
--batch-size can also be helpful for systems with much RAM.
---
 examples/grok-pull.post_update_hook.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/examples/grok-pull.post_update_hook.sh b/examples/grok-pull.post_update_hook.sh
index 092ca283..1f51140f 100755
--- a/examples/grok-pull.post_update_hook.sh
+++ b/examples/grok-pull.post_update_hook.sh
@@ -124,7 +124,9 @@ then
 		: v2 inboxes may be init-ed with an empty msgmap
 		;;
 	*)
-		# if on HDD and limited RAM, add `-j0' w/ public-inbox 1.6.0+
+		# if on HDD and limited RAM, add `--sequential-shard'
+		# and possibly a large `--batch-size' if you have much
+		# memory in public-inbox 1.6.0+
 		$EATMYDATA public-inbox-index -v "$inbox_dir"
 		;;
 	esac

                 reply	other threads:[~2020-08-13  8:04 UTC|newest]

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user/dev discussion of public-inbox itself

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