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More precise determination of when an in-memory journal needs to be

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spilled to disk.

FossilOrigin-Name: 6a505bdd9347783d3d8105cb8185aa787801bad0c855b623cfd780fb406f0e7b
This commit is contained in:
drh
2017-07-28 18:16:14 +00:00
parent 344f763f72
commit 9e61104c68
3 changed files with 16 additions and 8 deletions
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10
src/memjournal.c
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@@ -397,7 +397,15 @@ void sqlite3MemJournalOpen(sqlite3_file *pJfd){
int sqlite3JournalCreate(sqlite3_file *pJfd){
int rc = SQLITE_OK;
MemJournal *p = (MemJournal*)pJfd;
if( p->pMethod==&MemJournalMethods && (p->nSpill>0
if( p->pMethod==&MemJournalMethods && (
#ifdef SQLITE_ENABLE_ATOMIC_WRITE
p->nSpill>0
#else
/* While this appears to not be possible without ATOMIC_WRITE, the
** paths are complex, so it seems prudent to leave the test in as
** a NEVER(), in case our analysis is subtly flawed. */
NEVER(p->nSpill>0)
#endif
#ifdef SQLITE_ENABLE_BATCH_ATOMIC_WRITE
|| (p->flags & SQLITE_OPEN_MAIN_JOURNAL)
#endif