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Overview
| Comment: | Add a debug timer to pcache1Truncate(). Change the formatting of some other messages to make them easier to read. |
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| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | debug |
| Files: | files | file ages | folders |
| SHA1: |
7d0af4b53c440f4628f0cecdc4045933 |
| User & Date: | dan 2016-08-09 11:23:22.870 |
Context
|
2016-08-09
| ||
| 11:44 | Add another timer on pcache1TruncateUnsafe(). (check-in: 42ce53f648 user: drh tags: debug) | |
| 11:23 | Add a debug timer to pcache1Truncate(). Change the formatting of some other messages to make them easier to read. (check-in: 7d0af4b53c user: dan tags: debug) | |
| 01:21 | Refocus the timer on the pager_end_transaction() routine. (check-in: 9d4eb6e475 user: drh tags: debug) | |
Changes
Changes to src/pager.c.
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sqlite3OsClose(pPager->jfd);
if( bDelete ){
rc = sqlite3OsDelete(pPager->pVfs, pPager->zJournal, 0);
}
}
}
END_DEBUG_TIMER( DEBUG_TIMER_BIG_TIMEOUT ){
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sqlite3OsClose(pPager->jfd);
if( bDelete ){
rc = sqlite3OsDelete(pPager->pVfs, pPager->zJournal, 0);
}
}
}
END_DEBUG_TIMER( DEBUG_TIMER_BIG_TIMEOUT ){
sqlite3_log(SQLITE_NOTICE, "slow pager_end_transaction(1): %llu uS wal=%d",
iDebugTimer, pagerUseWal(pPager));
iDebugTimerStart += iDebugTimer;
}
#ifdef SQLITE_CHECK_PAGES
sqlite3PcacheIterateDirty(pPager->pPCache, pager_set_pagehash);
if( pPager->dbSize==0 && sqlite3PcacheRefCount(pPager->pPCache)>0 ){
PgHdr *p = sqlite3PagerLookup(pPager, 1);
if( p ){
p->pageHash = 0;
sqlite3PagerUnrefNotNull(p);
}
}
#endif
sqlite3BitvecDestroy(pPager->pInJournal);
pPager->pInJournal = 0;
pPager->nRec = 0;
sqlite3PcacheCleanAll(pPager->pPCache);
END_DEBUG_TIMER( DEBUG_TIMER_BIG_TIMEOUT ){
sqlite3_log(SQLITE_NOTICE, "slow pager_end_transaction(2): %llu uS wal=%d",
iDebugTimer, pagerUseWal(pPager));
iDebugTimerStart += iDebugTimer;
}
sqlite3PcacheTruncate(pPager->pPCache, pPager->dbSize);
END_DEBUG_TIMER( DEBUG_TIMER_BIG_TIMEOUT ){
sqlite3_log(SQLITE_NOTICE, "slow pager_end_transaction(3): %llu uS wal=%d",
iDebugTimer, pagerUseWal(pPager));
iDebugTimerStart += iDebugTimer;
}
if( pagerUseWal(pPager) ){
/* Drop the WAL write-lock, if any. Also, if the connection was in
** locking_mode=exclusive mode but is no longer, drop the EXCLUSIVE
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** successfully committed, but the EXCLUSIVE lock is still held on the
** file. So it is safe to truncate the database file to its minimum
** required size. */
assert( pPager->eLock==EXCLUSIVE_LOCK );
rc = pager_truncate(pPager, pPager->dbSize);
}
END_DEBUG_TIMER( DEBUG_TIMER_BIG_TIMEOUT ){
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** successfully committed, but the EXCLUSIVE lock is still held on the
** file. So it is safe to truncate the database file to its minimum
** required size. */
assert( pPager->eLock==EXCLUSIVE_LOCK );
rc = pager_truncate(pPager, pPager->dbSize);
}
END_DEBUG_TIMER( DEBUG_TIMER_BIG_TIMEOUT ){
sqlite3_log(SQLITE_NOTICE, "slow pager_end_transaction(4): %llu uS wal=%d",
iDebugTimer, pagerUseWal(pPager));
iDebugTimerStart += iDebugTimer;
}
if( rc==SQLITE_OK && bCommit && isOpen(pPager->fd) ){
rc = sqlite3OsFileControl(pPager->fd, SQLITE_FCNTL_COMMIT_PHASETWO, 0);
if( rc==SQLITE_NOTFOUND ) rc = SQLITE_OK;
}
if( !pPager->exclusiveMode
&& (!pagerUseWal(pPager) || sqlite3WalExclusiveMode(pPager->pWal, 0))
){
rc2 = pagerUnlockDb(pPager, SHARED_LOCK);
pPager->changeCountDone = 0;
}
pPager->eState = PAGER_READER;
pPager->setMaster = 0;
END_DEBUG_TIMER( DEBUG_TIMER_BIG_TIMEOUT ){
sqlite3_log(SQLITE_NOTICE, "slow pager_end_transaction(5): %llu uS wal=%d",
iDebugTimer, pagerUseWal(pPager));
}
return (rc==SQLITE_OK?rc2:rc);
}
/*
** Execute a rollback if a transaction is active and unlock the
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Changes to src/pcache1.c.
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**
** Discard all unpinned pages in the cache with a page number equal to
** or greater than parameter iLimit. Any pinned pages with a page number
** equal to or greater than iLimit are implicitly unpinned.
*/
static void pcache1Truncate(sqlite3_pcache *p, unsigned int iLimit){
PCache1 *pCache = (PCache1 *)p;
pcache1EnterMutex(pCache->pGroup);
if( iLimit<=pCache->iMaxKey ){
pcache1TruncateUnsafe(pCache, iLimit);
pCache->iMaxKey = iLimit-1;
}
pcache1LeaveMutex(pCache->pGroup);
}
/*
** Implementation of the sqlite3_pcache.xDestroy method.
**
** Destroy a cache allocated using pcache1Create().
*/
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**
** Discard all unpinned pages in the cache with a page number equal to
** or greater than parameter iLimit. Any pinned pages with a page number
** equal to or greater than iLimit are implicitly unpinned.
*/
static void pcache1Truncate(sqlite3_pcache *p, unsigned int iLimit){
PCache1 *pCache = (PCache1 *)p;
START_DEBUG_TIMER;
pcache1EnterMutex(pCache->pGroup);
if( iLimit<=pCache->iMaxKey ){
pcache1TruncateUnsafe(pCache, iLimit);
pCache->iMaxKey = iLimit-1;
}
pcache1LeaveMutex(pCache->pGroup);
END_DEBUG_TIMER( DEBUG_TIMER_BIG_TIMEOUT ){
sqlite3_log(SQLITE_NOTICE, "slow pcache1Truncate(%d): %llu uS",
(int)iLimit, iDebugTimer);
}
}
/*
** Implementation of the sqlite3_pcache.xDestroy method.
**
** Destroy a cache allocated using pcache1Create().
*/
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