USABLE_SPACE      228 ext/sqlite/libsqlite/src/btree.c #define MX_LOCAL_PAYLOAD ((USABLE_SPACE/4-(sizeof(CellHdr)+sizeof(Pgno)))&~3)
USABLE_SPACE      598 ext/sqlite/libsqlite/src/btree.c   freeSpace = USABLE_SPACE;
USABLE_SPACE     2423 ext/sqlite/libsqlite/src/btree.c     if( subtotal > USABLE_SPACE ){
USABLE_SPACE     2434 ext/sqlite/libsqlite/src/btree.c     while( szNew[i]<USABLE_SPACE/2 ){