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Add the SQLITE_EXTRA_DURABLE compile-time option.

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FossilOrigin-Name: 30671345b1c1ee55a2d1aa17273213f1849efd81
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drh
2016-01-25 13:55:47 +00:00
parent a7dc4a321d
commit 164c957b09
3 changed files with 23 additions and 8 deletions
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17
src/pager.c
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@@ -428,6 +428,20 @@ int sqlite3PagerTrace=1; /* True to enable tracing */
*/
#define MAX_SECTOR_SIZE 0x10000
/*
** If the option SQLITE_EXTRA_DURABLE option is set at compile-time, then
** SQLite will do extra fsync() operations when synchronous==FULL to help
** ensure that transactions are durable across a power failure. Most
** applications are happy as long as transactions are consistent across
** a power failure, and are perfectly willing to lose the last transaction
** in exchange for the extra performance of avoiding directory syncs.
** And so the default SQLITE_EXTRA_DURABLE setting is off.
*/
#ifndef SQLITE_EXTRA_DURABLE
# define SQLITE_EXTRA_DURABLE 0
#endif
/*
** An instance of the following structure is allocated for each active
** savepoint and statement transaction in the system. All such structures
@@ -1983,7 +1997,8 @@ static int pager_end_transaction(Pager *pPager, int hasMaster, int bCommit){
);
sqlite3OsClose(pPager->jfd);
if( bDelete ){
rc = sqlite3OsDelete(pPager->pVfs, pPager->zJournal, 0);
rc = sqlite3OsDelete(pPager->pVfs, pPager->zJournal,
pPager->fullSync && SQLITE_EXTRA_DURABLE);
}
}
}