git gc

有時候當你運行一些git命令（好比git pull）的時候，會有以下提示：

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

　　翻譯：

自動包裝最佳性能的存儲庫。
你也能夠手動運行 ‘get gc’ 。有關更多信息,請參見「git幫助gc」。

 

 

當有這個提示的時候，直接運行  ' git gc '，就能夠了。

 

緣由：

Git 往磁盤保存對象時默認使用的格式叫鬆散對象 (loose object) 格式。Git 時不時地將這些對象打包至一個叫 packfile 的二進制文件以節省空間並提升效率。當倉庫中有太多的鬆散對象則就會提示你運行 ' git gc '。

 

咱們能夠運行 ' find .git/objects -type f ' 命令，查看一下 objects 目錄裏有多少對象，以下：

$ find .git/objects -type f
.git/objects/07/0cc4950ddcd2595a8134d8e560aef2a733e581
.git/objects/13/93d47387301d83214a34883f182cacb717762c
.git/objects/1c/1962af2351551af106a46a2bf43543a8bacf52
.git/objects/1c/4c0087a2c81ae4d1a521eddcecbbedc5c90270
.git/objects/36/39f696bdc97385fefb67926cdc0895e3dc5bb3
.git/objects/48/ec12b8a1a0d53d49e80156cfe969e438384da1
.git/objects/52/65597ee5edea6bc415506f097ebe072ef79363
.git/objects/52/86195cdb9c73333e06fb755272030105c50ef3
...
.git/objects/pack/pack-0c73db178d8a396a3ab624b4acf9dda479593691.idx
.git/objects/pack/pack-0c73db178d8a396a3ab624b4acf9dda479593691.pack
.git/objects/pack/pack-7c6c1af87ebb721211b490eec0ee6d5b49b5b280.idx
.git/objects/pack/pack-7c6c1af87ebb721211b490eec0ee6d5b49b5b280.pack

　　而後在運行 ' git gc ' 命令後，在執行剛纔的命令，看下 object 目錄裏面還剩下多少對象，以下：

$ git gc
Counting objects: 11099, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (3219/3219), done.
Writing objects: 100% (11099/11099), done.
Total 11099 (delta 7805), reused 10988 (delta 7712)

userName@DST56034 /D/gitProject(master)
$ find .git/objects -type f
.git/objects/info/packs
.git/objects/pack/pack-1ddf288322e0efcb6ca533b685b707ef269ff8f0.idx
.git/objects/pack/pack-1ddf288322e0efcb6ca533b685b707ef269ff8f0.pack

 

相關文章：http://gitbook.liuhui998.com/4_10.html