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clarify the index memory usage analysis

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it seems I extracted that data from [this mailing list post][] which
in turn takes it from [this github comment][].

 [this mailing list post]: http://librelist.com/browser/attic/2014/5/6/questions-and-suggestions-about-inner-working-of-attic/
 [this github comment]: https://github.com/jborg/attic/issues/26#issuecomment-35439254
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anarcat 2015-03-05 08:57:52 -05:00
parent 0ba86357d7
commit 5f882e976d
1 changed files with 4 additions and 1 deletions
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docs/internals.rst
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@ -213,7 +213,7 @@ Indexes memory usage
-------------------- --------------------
Here is the estimated memory usage of |project_name| when using those Here is the estimated memory usage of |project_name| when using those
indexes: indexes.
Repository index Repository index
40 bytes x N ~ 200MB (If a remote repository is 40 bytes x N ~ 200MB (If a remote repository is
@ -225,6 +225,9 @@ Chunk lookup index
File chunk cache File chunk cache
probably 80-100 bytes x N ~ 400MB probably 80-100 bytes x N ~ 400MB
In the above we assume 350GB of data that we divide on an average 64KB
chunk size, so N is around 5.3 million.
Encryption Encryption
---------- ----------