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Keep track of the optimal number of reserved bytes (by looking at reserve

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byte requests in calls to sqlite3BtreeSetPageSize()) and then change the
reserve byte count to the optimal when doing a VACUUM or when using the
backup API.

FossilOrigin-Name: 28c2b726285ea88b334acfd6390a057d2d244838
This commit is contained in:
drh
2015-02-21 00:19:25 +00:00
parent db222adfd3
commit ad0961b31b
9 changed files with 45 additions and 28 deletions
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4
src/btree.h
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@@ -73,10 +73,8 @@ int sqlite3BtreeGetPageSize(Btree*);
int sqlite3BtreeMaxPageCount(Btree*,int);
u32 sqlite3BtreeLastPage(Btree*);
int sqlite3BtreeSecureDelete(Btree*,int);
int sqlite3BtreeGetReserve(Btree*);
#if defined(SQLITE_HAS_CODEC) || defined(SQLITE_DEBUG)
int sqlite3BtreeGetOptimalReserve(Btree*);
int sqlite3BtreeGetReserveNoMutex(Btree *p);
#endif
int sqlite3BtreeSetAutoVacuum(Btree *, int);
int sqlite3BtreeGetAutoVacuum(Btree *);
int sqlite3BtreeBeginTrans(Btree*,int);