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Overview
| Comment: | Update the header comment on the memjournal.c file. No code changes. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | 07f10deabb0f4207408142541e3913d6 |
| User & Date: | drh 2016-04-12 11:58:18 |
Context
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2016-04-12
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| 16:04 | Add the sqlite3_snapshot_cmp() interface (available only with SQLITE_ENABLE_SNAPSHOT). check-in: 7e728965 user: drh tags: trunk | |
| 11:58 | Update the header comment on the memjournal.c file. No code changes. check-in: 07f10dea user: drh tags: trunk | |
| 00:26 | Performance optimization the Vdbe allocator. check-in: e2c4995b user: drh tags: trunk | |
Changes
Changes to src/memjournal.c.
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** May you share freely, never taking more than you give. ** ************************************************************************* ** ** This file contains code use to implement an in-memory rollback journal. ** The in-memory rollback journal is used to journal transactions for ** ":memory:" databases and when the journal_mode=MEMORY pragma is used. */ #include "sqliteInt.h" /* Forward references to internal structures */ typedef struct MemJournal MemJournal; typedef struct FilePoint FilePoint; typedef struct FileChunk FileChunk; |
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** May you share freely, never taking more than you give. ** ************************************************************************* ** ** This file contains code use to implement an in-memory rollback journal. ** The in-memory rollback journal is used to journal transactions for ** ":memory:" databases and when the journal_mode=MEMORY pragma is used. ** ** Update: The in-memory journal is also used to temporarily cache ** smaller journals that are not critical for power-loss recovery. ** For example, statement journals that are not too big will be held ** entirely in memory, thus reducing the number of file I/O calls, and ** more importantly, reducing temporary file creation events. If these ** journals become too large for memory, they are spilled to disk. But ** in the common case, they are usually small and no file I/O needs to ** occur. */ #include "sqliteInt.h" /* Forward references to internal structures */ typedef struct MemJournal MemJournal; typedef struct FilePoint FilePoint; typedef struct FileChunk FileChunk; |