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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/pcache.c | |
| 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/pcache.c')
| -rw-r--r-- | src/pcache.c | 8 |
1 files changed, 7 insertions, 1 deletions
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 |