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Avoid blocking as part of passive checkpoint operations, even if SQLITE_ENABLE_SETLK_TIMEOUT is defined.

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FossilOrigin-Name: e5ecc404cae1ce8b639d0263fa07571c066f11bfc62f5ba331ad7ae138e78572
This commit is contained in:
dan
2023-11-08 15:49:57 +00:00
parent 8657eddcdb
commit 0ad5301378
4 changed files with 16 additions and 10 deletions
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7
src/wal.c
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@@ -4248,9 +4248,14 @@ int sqlite3WalCheckpoint(
/* Read the wal-index header. */
SEH_TRY {
if( rc==SQLITE_OK ){
/* For a passive checkpoint, do not re-enable blocking locks after
** reading the wal-index header. A passive checkpoint should not block
** or invoke the busy handler. The only lock such a checkpoint may
** attempt to obtain is a lock on a read-slot, and it should give up
** immediately and do a partial checkpoint if it cannot obtain it. */
walDisableBlocking(pWal);
rc = walIndexReadHdr(pWal, &isChanged);
(void)walEnableBlocking(pWal);
if( eMode2!=SQLITE_CHECKPOINT_PASSIVE ) (void)walEnableBlocking(pWal);
if( isChanged && pWal->pDbFd->pMethods->iVersion>=3 ){
sqlite3OsUnfetch(pWal->pDbFd, 0, 0);
}