git操作提示 Auto packing the repository for optimum performance. You may also run "git gc" manually. See

在对git库执行一些操作命令时(比如git am ,git pull,git push等操作)的时候,会出现类似如下提示(我是在用git am打patch时出现的,其他情况也是一回事):

ronny@ronny:~/tmpgitrepol$ git am ~/03patch/kernel/0001-add-kernel-version.patch --keep-cr
Applying: add kernel version for compile
Auto packing the repository for optimum performance. You may also
run "git gc" manually. See "git help gc" for more information.
Counting objects: 84286, done.

而且git am 后不退出,必须要ctrl+c退出。(其实是git 在将松散对象打包,这个需要时间,没有执行完打包,所以没退出)

里面主要关心如下两句:

Auto packing the repository for optimum performance. You may also
run "git gc" manually. See "git help gc" for more information.

即表示:

自动包装最佳性能的存储库。
你也可以手动运行 ‘get gc’ 。查看更多信息请执行“git help gc”。


当有这个提示的时候,直接运行 ’ git gc ‘,就可以了。

原因:

Git 往磁盘保存对象时默认使用的格式叫松散对象 (loose object) 格式。Git 时不时地将这些对象打包至一个叫 packfile 的二进制文件以节省空间并提高效率。当仓库中有太多的松散对象则就会提示你运行 ’ git gc ‘。

我们可以运行 ’ find .git/objects -type f ’ 命令,查看一下 objects 目录里有多少对象,如下:

ronny@ronny:~/tmpgitrepol$ find .git/objects -type f
.git/objects/e4/00a9bf597d6956e6cfc5a4ba57e0f8d78a3025
.git/objects/70/8d7c923cb5954bfe1944e7cf7d7de93298f42f
.git/objects/70/86ddbb3226ad236d3d806cd530006e07392048
.git/objects/bd/b9f69f1b169e6f364455636ef3fb9037f345c5
.git/objects/c4/49782586498f0669271dbb5b2ae92abae7b7cd
.git/objects/4a/4c07ddbe727381f1ee9aab6faa194827419f1b
.git/objects/17/df87cafd85c400b71c7e56ffc2eaa78d2a55d8
.git/objects/ad/f130fd58cd2a0831a47f17e7f14d7ed4d86f9c
.git/objects/97/9c677acf5eb4e45ebe299e8c4b947d899b01af
.git/objects/79/56a405a7bc6e412685a967b3e798445c31bb36
.git/objects/79/12f0ebebb70a675e6ffa57703ddb78bf99d221
.git/objects/4b/ee144e033edd74677a14c311b1eb32b6ef8d6d
.git/objects/4b/1c9b2ce657a6677143b3c08b05379c6b62af05
.git/objects/info/packs
.git/objects/da/3de9a5f2e2d43a9bd53f74368f7e3623d1c1f6
.git/objects/47/b15e4bb0313b9255252c6815bbeb6cf56f9f2c
.git/objects/72/3be48015613503f9c315781b6c7bc60de76c0b
..........................
.git/objects/d6/6bc0f7bd27bf0fc0383792871854c497a01e3d
.git/objects/d6/9a6b3dcb61590a63ca464d69b3613be857936b
.git/objects/pack/pack-862a0b39f354a7fde317459d6dcb8162c865d172.pack
.git/objects/pack/pack-862a0b39f354a7fde317459d6dcb8162c865d172.idx
.git/objects/7f/d654bfdd3255e07154ff3ef8388e295d79e3b0
.git/objects/32/cef5fe936a99b2875942dbbefb93242df454fd
.git/objects/c3/0e9e1875925d71757ffda53b103f99c56d5bda
.git/objects/3f/87d962119364899e0ad111d869f4fb289bad3b
.git/objects/9c/d6bd685d29237f2b82425019dcc549781932a2
.git/objects/95/557cadc1df7bcc8657a842fbf35fb0566d84e9
.git/objects/ee/abfadeea2c0c6467e279d0c8907141e0a27d1c

..........................

.git/objects/d7/f7edb7d654eccd6b7acd0d2e501793bf14e42f
.git/objects/bc/b69da6f5b1294e32deb97046a80dac8b473ddd
.git/objects/73/51b70ef6db6adc61da2c766eb13397b6506152
.git/objects/e2/4d68e5288cfbc200b863c16178f0c32ef5d672
.git/objects/cb/588c96be139adaaaafed4225b16452fc3b69b3
.git/objects/0b/babb1c4e28109bb3cf8e5b9ece5aaeec90d417
.git/objects/28/043911626d5f683938f47477e8680b7d654710
.git/objects/a6/5151506d5821f160bf03e19ec362ba1929a79a
.git/objects/b3/8f35933655073128e9b2a5ebdd6c72d8090811
.git/objects/98/1b94a3bf5ab22f868452d7a1eb5128278ae3d7

然后我们执行git gc试试

git gc
Counting objects: 84389, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (52015/52015), done.
Writing objects: 100% (84389/84389), done.
Total 84389 (delta 31577), reused 84317 (delta 31531)

然后在运行 ’ git gc ’ 命令后,再执行刚才的命令,看下 object 目录里面还剩下多少对象,如下:
ronny@ronny:~/tmpgitrepol$ find .git/objects -type f

.git/objects/info/packs
.git/objects/pack/pack-ad6385919cc8c0e4ba2ec4cf7c8e8119a337f625.idx
.git/objects/pack/pack-ad6385919cc8c0e4ba2ec4cf7c8e8119a337f625.pack

接下来再执行git 命令的时候就没有这种情况了,patch直接应用,且不再有上面的提示。

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