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From: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
To: git@vger.kernel.org
Cc: "Junio C Hamano" <gitster@pobox.com>,
	"Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>,
	"Jeff King" <peff@peff.net>,
	"Michael Haggerty" <mhagger@alum.mit.edu>,
	"Stefan Beller" <stefanbeller@gmail.com>,
	"Jonathan Nieder" <jrnieder@gmail.com>,
	"Matt McCutchen" <matt@mattmccutchen.net>,
	"Johannes Sixt" <j6t@kdbg.org>, "Todd Zullinger" <tmz@pobox.com>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Subject: [PATCH v4 07/11] gc docs: note how --aggressive impacts --window & --depth
Date: Sun,  7 Apr 2019 21:52:13 +0200	[thread overview]
Message-ID: <20190407195217.3607-8-avarab@gmail.com> (raw)
In-Reply-To: <20190322093242.5508-5-avarab@gmail.com>

Since 07e7dbf0db (gc: default aggressive depth to 50, 2016-08-11) we
somewhat confusingly use the same depth under --aggressive as we do by
default.

As noted in that commit that makes sense, it was wrong to make more
depth the default for "aggressive", and thus save disk space at the
expense of runtime performance, which is usually the opposite of
someone who'd like "aggressive gc" wants.

But that's left us with a mostly-redundant configuration variable, so
let's clearly note in its documentation that it doesn't change the
default.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 Documentation/config/gc.txt | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Documentation/config/gc.txt b/Documentation/config/gc.txt
index 56918a5008..f732fe5bfd 100644
--- a/Documentation/config/gc.txt
+++ b/Documentation/config/gc.txt
@@ -1,7 +1,8 @@
 gc.aggressiveDepth::
 	The depth parameter used in the delta compression
 	algorithm used by 'git gc --aggressive'.  This defaults
-	to 50.
+	to 50, which is the default for the `--depth` option when
+	`--aggressive` isn't in use.
 +
 See the documentation for the `--depth` option in
 linkgit:git-repack[1] for more details.
@@ -9,7 +10,8 @@ linkgit:git-repack[1] for more details.
 gc.aggressiveWindow::
 	The window size parameter used in the delta compression
 	algorithm used by 'git gc --aggressive'.  This defaults
-	to 250.
+	to 250, which is a much more aggressive window size than
+	the default `--window` of 10.
 +
 See the documentation for the `--window` option in
 linkgit:git-repack[1] for more details.
-- 
2.21.0.392.gf8f6787159e


  parent reply	other threads:[~2019-04-07 19:52 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-18 16:14 [PATCH 0/4] gc docs: modernize and fix the documentation Ævar Arnfjörð Bjarmason
2019-03-18 16:14 ` [PATCH 1/4] gc docs: modernize the advice for manually running "gc" Ævar Arnfjörð Bjarmason
2019-03-18 21:27   ` Jeff King
2019-03-18 22:18     ` Ævar Arnfjörð Bjarmason
2019-03-18 16:15 ` [PATCH 2/4] gc docs: include the "gc.*" section from "config" in "gc" Ævar Arnfjörð Bjarmason
2019-03-18 21:31   ` Jeff King
2019-03-21 22:11     ` Andreas Heiduk
2019-03-19  2:08   ` Duy Nguyen
2019-03-18 16:15 ` [PATCH 3/4] gc docs: de-duplicate "OPTIONS" and "CONFIGURATION" Ævar Arnfjörð Bjarmason
2019-03-18 21:49   ` Jeff King
2019-03-18 22:48     ` Ævar Arnfjörð Bjarmason
2019-03-18 23:42       ` Jeff King
2019-03-18 16:15 ` [PATCH 4/4] gc docs: downplay the usefulness of --aggressive Ævar Arnfjörð Bjarmason
2019-03-18 20:28   ` Jonathan Nieder
2019-03-18 21:22     ` Jeff King
2019-03-18 22:13       ` Ævar Arnfjörð Bjarmason
2019-03-18 23:53         ` Jeff King
2019-03-19  6:54   ` Johannes Sixt
2019-03-19  9:28     ` Ævar Arnfjörð Bjarmason
2019-03-18 21:51 ` [PATCH 0/4] gc docs: modernize and fix the documentation Jeff King
2019-03-18 22:45   ` Ævar Arnfjörð Bjarmason
2019-03-19  0:18     ` Jeff King
2019-05-06  9:44       ` Ævar Arnfjörð Bjarmason
2019-05-07  7:51         ` Jeff King
2019-05-09 23:20           ` Ævar Arnfjörð Bjarmason
2019-07-31  4:26             ` Jeff King
2019-07-31 10:12               ` Ævar Arnfjörð Bjarmason
2019-03-21 20:50 ` [PATCH v2 00/10] " Ævar Arnfjörð Bjarmason
2019-03-22  9:32   ` [PATCH v3 00/11] gc docs: modernize the advice for manually running "gc" Ævar Arnfjörð Bjarmason
2019-03-22  9:32   ` [PATCH v3 01/11] " Ævar Arnfjörð Bjarmason
2019-03-22  9:32   ` [PATCH v3 02/11] gc docs: stop noting "repack" flags Ævar Arnfjörð Bjarmason
2019-03-22  9:32   ` [PATCH v3 03/11] gc docs: clean grammar for "gc.bigPackThreshold" Ævar Arnfjörð Bjarmason
2019-03-22  9:32   ` [PATCH v3 04/11] gc docs: include the "gc.*" section from "config" in "gc" Ævar Arnfjörð Bjarmason
2019-03-30 18:04     ` Todd Zullinger
2019-04-07 19:52     ` [PATCH v4 00/11] gc docs: modernize and fix the documentation Ævar Arnfjörð Bjarmason
2019-04-07 19:52     ` [PATCH v4 01/11] gc docs: modernize the advice for manually running "gc" Ævar Arnfjörð Bjarmason
2019-04-07 19:52     ` [PATCH v4 02/11] gc docs: stop noting "repack" flags Ævar Arnfjörð Bjarmason
2019-04-07 19:52     ` [PATCH v4 03/11] gc docs: clean grammar for "gc.bigPackThreshold" Ævar Arnfjörð Bjarmason
2019-04-07 19:52     ` [PATCH v4 04/11] gc docs: include the "gc.*" section from "config" in "gc" Ævar Arnfjörð Bjarmason
2019-04-07 19:52     ` [PATCH v4 05/11] gc docs: re-flow the "gc.*" section in "config" Ævar Arnfjörð Bjarmason
2019-04-07 19:52     ` [PATCH v4 06/11] gc docs: fix formatting for "gc.writeCommitGraph" Ævar Arnfjörð Bjarmason
2019-04-07 19:52     ` Ævar Arnfjörð Bjarmason [this message]
2019-04-07 19:52     ` [PATCH v4 08/11] gc docs: downplay the usefulness of --aggressive Ævar Arnfjörð Bjarmason
2019-04-07 19:52     ` [PATCH v4 09/11] gc docs: note "gc --aggressive" in "fast-import" Ævar Arnfjörð Bjarmason
2019-04-07 19:52     ` [PATCH v4 10/11] gc docs: clarify that "gc" doesn't throw away referenced objects Ævar Arnfjörð Bjarmason
2019-04-07 19:52     ` [PATCH v4 11/11] gc docs: remove incorrect reference to gc.auto=0 Ævar Arnfjörð Bjarmason
2019-03-22  9:32   ` [PATCH v3 05/11] gc docs: re-flow the "gc.*" section in "config" Ævar Arnfjörð Bjarmason
2019-03-22  9:32   ` [PATCH v3 06/11] gc docs: fix formatting for "gc.writeCommitGraph" Ævar Arnfjörð Bjarmason
2019-03-22  9:32   ` [PATCH v3 07/11] gc docs: note how --aggressive impacts --window & --depth Ævar Arnfjörð Bjarmason
2019-03-22  9:32   ` [PATCH v3 08/11] gc docs: downplay the usefulness of --aggressive Ævar Arnfjörð Bjarmason
2019-03-22  9:32   ` [PATCH v3 09/11] gc docs: note "gc --aggressive" in "fast-import" Ævar Arnfjörð Bjarmason
2019-03-22  9:32   ` [PATCH v3 10/11] gc docs: clarify that "gc" doesn't throw away referenced objects Ævar Arnfjörð Bjarmason
2019-03-22  9:32   ` [PATCH v3 11/11] gc docs: remove incorrect reference to gc.auto=0 Ævar Arnfjörð Bjarmason
2019-03-21 20:50 ` [PATCH v2 01/10] gc docs: modernize the advice for manually running "gc" Ævar Arnfjörð Bjarmason
2019-03-22  6:01   ` Junio C Hamano
2019-03-21 20:50 ` [PATCH v2 02/10] gc docs: stop noting "repack" flags Ævar Arnfjörð Bjarmason
2019-03-21 20:50 ` [PATCH v2 03/10] gc docs: clean grammar for "gc.bigPackThreshold" Ævar Arnfjörð Bjarmason
2019-03-21 20:50 ` [PATCH v2 04/10] gc docs: include the "gc.*" section from "config" in "gc" Ævar Arnfjörð Bjarmason
2019-03-21 20:50 ` [PATCH v2 05/10] gc docs: re-flow the "gc.*" section in "config" Ævar Arnfjörð Bjarmason
2019-03-21 20:50 ` [PATCH v2 06/10] gc docs: note how --aggressive impacts --window & --depth Ævar Arnfjörð Bjarmason
2019-03-21 20:50 ` [PATCH v2 07/10] gc docs: downplay the usefulness of --aggressive Ævar Arnfjörð Bjarmason
2019-03-21 20:50 ` [PATCH v2 08/10] gc docs: note "gc --aggressive" in "fast-import" Ævar Arnfjörð Bjarmason
2019-03-21 20:50 ` [PATCH v2 09/10] gc docs: clarify that "gc" doesn't throw away referenced objects Ævar Arnfjörð Bjarmason
2019-03-21 20:50 ` [PATCH v2 10/10] gc docs: remove incorrect reference to gc.auto=0 Ævar Arnfjörð Bjarmason

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