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| author |  Nicolas Pitre <nico@cam.org> | 2009-08-05 16:55:07 -0400 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2009-08-05 20:14:54 -0700 |
| commit | 5749b0b2f935dc418c98ba8e7c52c3291451bc4a (patch) | |
| tree | 67e34e7cbc3b1bf0fa6bdf8f64c6859fc729416f /Documentation/config.txt | |
| parent | Merge branch 'maint-1.6.3' into maint (diff) | |
| download | tgif-5749b0b2f935dc418c98ba8e7c52c3291451bc4a.tar.xz | |
don't let the delta cache grow unbounded in 'git repack'
I have 4GB of RAM on my system which should, in theory, be quite enough
to repack a 600 MB repository. However the unbounded delta cache size
always pushes it into swap, at which point everything virtually comes to
a halt. So unbounded caches are never a good idea.
A default of 256MB should be a good compromize between memory usage and
speed where medium sized repositories are still likely to fit in the
cache with a reasonable memory usage, and larger repositories are going
to take quite some time to repack already anyway.
While at it, clarify the associated config variable documentation
entries a bit.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'Documentation/config.txt')
| -rw-r--r-- | Documentation/config.txt | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/Documentation/config.txt b/Documentation/config.txt index c6f09f801a..7791c32bc3 100644 --- a/Documentation/config.txt +++ b/Documentation/config.txt @@ -1218,12 +1218,20 @@ pack.compression:: pack.deltaCacheSize:: The maximum memory in bytes used for caching deltas in - linkgit:git-pack-objects[1]. - A value of 0 means no limit. Defaults to 0. + linkgit:git-pack-objects[1] before writing them out to a pack. + This cache is used to speed up the writing object phase by not + having to recompute the final delta result once the best match + for all objects is found. Repacking large repositories on machines + which are tight with memory might be badly impacted by this though, + especially if this cache pushes the system into swapping. + A value of 0 means no limit. The smallest size of 1 byte may be + used to virtually disable this cache. Defaults to 256 MiB. pack.deltaCacheLimit:: The maximum size of a delta, that is cached in - linkgit:git-pack-objects[1]. Defaults to 1000. + linkgit:git-pack-objects[1]. This cache is used to speed up the + writing object phase by not having to recompute the final delta + result once the best match for all objects is found. Defaults to 1000. pack.threads:: Specifies the number of threads to spawn when searching for best |