Documentation/config/pack.txt

   1 pack.window::
   2         The size of the window used by linkgit:git-pack-objects[1] when no
   3         window size is given on the command line. Defaults to 10.
   4
   5 pack.depth::
   6         The maximum delta depth used by linkgit:git-pack-objects[1] when no
   7         maximum depth is given on the command line. Defaults to 50.
   8         Maximum value is 4095.
   9
  10 pack.windowMemory::
  11         The maximum size of memory that is consumed by each thread
  12         in linkgit:git-pack-objects[1] for pack window memory when
  13         no limit is given on the command line.  The value can be
  14         suffixed with "k", "m", or "g".  When left unconfigured (or
  15         set explicitly to 0), there will be no limit.
  16
  17 pack.compression::
  18         An integer -1..9, indicating the compression level for objects
  19         in a pack file. -1 is the zlib default. 0 means no
  20         compression, and 1..9 are various speed/size tradeoffs, 9 being
  21         slowest.  If not set,  defaults to core.compression.  If that is
  22         not set,  defaults to -1, the zlib default, which is "a default
  23         compromise between speed and compression (currently equivalent
  24         to level 6)."
  25 +
  26 Note that changing the compression level will not automatically recompress
  27 all existing objects. You can force recompression by passing the -F option
  28 to linkgit:git-repack[1].
  29
  30 pack.island::
  31         An extended regular expression configuring a set of delta
  32         islands. See "DELTA ISLANDS" in linkgit:git-pack-objects[1]
  33         for details.
  34
  35 pack.islandCore::
  36         Specify an island name which gets to have its objects be
  37         packed first. This creates a kind of pseudo-pack at the front
  38         of one pack, so that the objects from the specified island are
  39         hopefully faster to copy into any pack that should be served
  40         to a user requesting these objects. In practice this means
  41         that the island specified should likely correspond to what is
  42         the most commonly cloned in the repo. See also "DELTA ISLANDS"
  43         in linkgit:git-pack-objects[1].
  44
  45 pack.deltaCacheSize::
  46         The maximum memory in bytes used for caching deltas in
  47         linkgit:git-pack-objects[1] before writing them out to a pack.
  48         This cache is used to speed up the writing object phase by not
  49         having to recompute the final delta result once the best match
  50         for all objects is found.  Repacking large repositories on machines
  51         which are tight with memory might be badly impacted by this though,
  52         especially if this cache pushes the system into swapping.
  53         A value of 0 means no limit. The smallest size of 1 byte may be
  54         used to virtually disable this cache. Defaults to 256 MiB.
  55
  56 pack.deltaCacheLimit::
  57         The maximum size of a delta, that is cached in
  58         linkgit:git-pack-objects[1]. This cache is used to speed up the
  59         writing object phase by not having to recompute the final delta
  60         result once the best match for all objects is found.
  61         Defaults to 1000. Maximum value is 65535.
  62
  63 pack.threads::
  64         Specifies the number of threads to spawn when searching for best
  65         delta matches.  This requires that linkgit:git-pack-objects[1]
  66         be compiled with pthreads otherwise this option is ignored with a
  67         warning. This is meant to reduce packing time on multiprocessor
  68         machines. The required amount of memory for the delta search window
  69         is however multiplied by the number of threads.
  70         Specifying 0 will cause Git to auto-detect the number of CPU's
  71         and set the number of threads accordingly.
  72
  73 pack.indexVersion::
  74         Specify the default pack index version.  Valid values are 1 for
  75         legacy pack index used by Git versions prior to 1.5.2, and 2 for
  76         the new pack index with capabilities for packs larger than 4 GB
  77         as well as proper protection against the repacking of corrupted
  78         packs.  Version 2 is the default.  Note that version 2 is enforced
  79         and this config option ignored whenever the corresponding pack is
  80         larger than 2 GB.
  81 +
  82 If you have an old Git that does not understand the version 2 `*.idx` file,
  83 cloning or fetching over a non native protocol (e.g. "http")
  84 that will copy both `*.pack` file and corresponding `*.idx` file from the
  85 other side may give you a repository that cannot be accessed with your
  86 older version of Git. If the `*.pack` file is smaller than 2 GB, however,
  87 you can use linkgit:git-index-pack[1] on the *.pack file to regenerate
  88 the `*.idx` file.
  89
  90 pack.packSizeLimit::
  91         The maximum size of a pack.  This setting only affects
  92         packing to a file when repacking, i.e. the git:// protocol
  93         is unaffected.  It can be overridden by the `--max-pack-size`
  94         option of linkgit:git-repack[1].  Reaching this limit results
  95         in the creation of multiple packfiles; which in turn prevents
  96         bitmaps from being created.
  97         The minimum size allowed is limited to 1 MiB.
  98         The default is unlimited.
  99         Common unit suffixes of 'k', 'm', or 'g' are
 100         supported.
 101
 102 pack.useBitmaps::
 103         When true, git will use pack bitmaps (if available) when packing
 104         to stdout (e.g., during the server side of a fetch). Defaults to
 105         true. You should not generally need to turn this off unless
 106         you are debugging pack bitmaps.
 107
 108 pack.useSparse::
 109         When true, git will default to using the '--sparse' option in
 110         'git pack-objects' when the '--revs' option is present. This
 111         algorithm only walks trees that appear in paths that introduce new
 112         objects. This can have significant performance benefits when
 113         computing a pack to send a small change. However, it is possible
 114         that extra objects are added to the pack-file if the included
 115         commits contain certain types of direct renames.
 116
 117 pack.writeBitmaps (deprecated)::
 118         This is a deprecated synonym for `repack.writeBitmaps`.
 119
 120 pack.writeBitmapHashCache::
 121         When true, git will include a "hash cache" section in the bitmap
 122         index (if one is written). This cache can be used to feed git's
 123         delta heuristics, potentially leading to better deltas between
 124         bitmapped and non-bitmapped objects (e.g., when serving a fetch
 125         between an older, bitmapped pack and objects that have been
 126         pushed since the last gc). The downside is that it consumes 4
 127         bytes per object of disk space. Defaults to true.