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| author | drh <drh@noemail.net> | 2016-05-12 12:08:48 +0000 |
|---|---|---|
| committer | drh <drh@noemail.net> | 2016-05-12 12:08:48 +0000 |
| commit | 91ef8ad42ceee04388ba471dfc8482ccaed91cc2 (patch) | |
| tree | 8b41393ed119c7d78bdf0120212a08cd1e07ae85 /src | |
| parent | 42bee5f4d6cefc9e467d6c7203a530f815e42b36 (diff) | |
| parent | 72e6a399073fd63bb5e8bc1db07a95365d2a2e2b (diff) | |
| download | sqlite-91ef8ad42ceee04388ba471dfc8482ccaed91cc2.tar.gz sqlite-91ef8ad42ceee04388ba471dfc8482ccaed91cc2.zip | |
For in-memory databases, it does not matter if pcache entries are marked
"clean" or "writable".
FossilOrigin-Name: 06c1e27ca868f247f8c27b03eb19aac004f28650
Diffstat (limited to 'src')
| -rw-r--r-- | src/pager.c | 2 | ||||
| -rw-r--r-- | src/pcache.c | 8 | ||||
| -rw-r--r-- | src/pcache.h | 2 |
3 files changed, 9 insertions, 3 deletions
diff --git a/src/pager.c b/src/pager.c index 654cc640d..75cde3c02 100644 --- a/src/pager.c +++ b/src/pager.c @@ -2033,7 +2033,7 @@ static int pager_end_transaction(Pager *pPager, int hasMaster, int bCommit){ pPager->pInJournal = 0; pPager->nRec = 0; if( rc==SQLITE_OK ){ - if( MEMDB || pagerFlushOnCommit(pPager) ){ + if( pagerFlushOnCommit(pPager) ){ sqlite3PcacheCleanAll(pPager->pPCache); }else{ sqlite3PcacheClearWritable(pPager->pPCache); diff --git a/src/pcache.c b/src/pcache.c index fab6ad32a..ee7914a44 100644 --- a/src/pcache.c +++ b/src/pcache.c @@ -14,7 +14,13 @@ #include "sqliteInt.h" /* -** A complete page cache is an instance of this structure. +** A complete page cache is an instance of this structure. Every +** entry in the cache holds a single page of the database file. The +** btree layer only operates on the cached copy of the database pages. +** +** A page cache entry is "clean" if it exactly matches what is currently +** on disk. A page is "dirty" if it has been modified and needs to be +** persisted to disk. ** ** pDirty, pDirtyTail, pSynced: ** All dirty pages are linked into the doubly linked list using diff --git a/src/pcache.h b/src/pcache.h index 04bce289d..8e0f12e09 100644 --- a/src/pcache.h +++ b/src/pcache.h @@ -26,7 +26,7 @@ struct PgHdr { sqlite3_pcache_page *pPage; /* Pcache object page handle */ void *pData; /* Page data */ void *pExtra; /* Extra content */ - PgHdr *pDirty; /* Transient list of dirty pages */ + PgHdr *pDirty; /* Transient list of dirty sorted by pgno */ Pager *pPager; /* The pager this page is part of */ Pgno pgno; /* Page number for this page */ #ifdef SQLITE_CHECK_PAGES |