Re: question about svn

["C. Michael Pilato" <cm...@collab.net>]

=?ks_c_5601-1987?B?IsDMu/O/sSI=?= <sa...@naver.com> writes:

> I know this email can bother you and you might delete this email...
> But I have no idea where I can ask my question.

users@subversion.tigris.org is the canonical question-posing place for
Subversion questions.  I'm Cc:ing my response there.

> How big the "strings" file can glow ?

It can grow as big as can be supported by your operating system and
Berkeley DB.  And that's pretty big (much bigger than yours).  

> In my project, the "strings" file size stuck at "255705088" bytes.
> thank you..

A given Berkeley DB table might appear to be "stuck" at a given size
because those table files are fragmented internally.  That is, inside
your 255M file there might be a whole range of bytes that Berkeley has
marked as "unused".  So, until those unused ranges are used up, stuff
added to that file will get dumped into the unused ranges, and the
file will not physically grow.

You can use Berkeley DB's db_stat utility to get this kind of
information about your tables (how much of them is really in use, and
how much is "free").

   $ db_stat -d /usr/local/svn/subversion/db/strings 
   53162   Btree magic number.
   9       Btree version number.
   Flags:  duplicates, little-endian
   2       Minimum keys per-page.
   4096    Underlying database page size.
   3       Number of levels in the tree.
   71268   Number of unique keys in the tree.
   179875  Number of data items in the tree.
   91      Number of tree internal pages.
   184168  Number of bytes free in tree internal pages (51% ff).
   10255   Number of tree leaf pages.
   22M     Number of bytes free in tree leaf pages (46% ff).
   188     Number of tree duplicate pages.
   553596  Number of bytes free in tree duplicate pages (28% ff).
   18585   Number of tree overflow pages.
   10M     Number of bytes free in tree overflow pages (86% ff).
   1422    Number of pages on the free list.

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