/ Check-in [1f24ae71]
Login

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Avoid excess syncs when padding a transaction in a WAL.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 1f24ae716df6232de768e245ea990049deee3c22
User & Date: drh 2011-12-23 13:32:07
Context
2011-12-23
20:49
Documentation updates. No changes to code. check-in: a8a1a639 user: drh tags: trunk
13:32
Avoid excess syncs when padding a transaction in a WAL. check-in: 1f24ae71 user: drh tags: trunk
02:07
Merge the POWERSAFE_OVERWRITE features and the use of statvfs() from the statvfs branch into trunk. check-in: 2370d70e user: drh tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to src/wal.c.

2825
2826
2827
2828
2829
2830
2831
2832
2833

2834
2835
2836
2837
2838
2839
2840
      w.iSyncPoint = ((iOffset+sectorSize-1)/sectorSize)*sectorSize;
      while( iOffset<w.iSyncPoint ){
        rc = walWriteOneFrame(&w, pLast, nTruncate, iOffset);
        if( rc ) return rc;
        iOffset += szFrame;
        nExtra++;
      }
    }
    rc = sqlite3OsSync(w.pFd, sync_flags & SQLITE_SYNC_MASK);

  }

  /* If this frame set completes the first transaction in the WAL and
  ** if PRAGMA journal_size_limit is set, then truncate the WAL to the
  ** journal size limit, if possible.
  */
  if( isCommit && pWal->truncateOnCommit && pWal->mxWalSize>=0 ){







|
|
>







2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
      w.iSyncPoint = ((iOffset+sectorSize-1)/sectorSize)*sectorSize;
      while( iOffset<w.iSyncPoint ){
        rc = walWriteOneFrame(&w, pLast, nTruncate, iOffset);
        if( rc ) return rc;
        iOffset += szFrame;
        nExtra++;
      }
    }else{
      rc = sqlite3OsSync(w.pFd, sync_flags & SQLITE_SYNC_MASK);
    }
  }

  /* If this frame set completes the first transaction in the WAL and
  ** if PRAGMA journal_size_limit is set, then truncate the WAL to the
  ** journal size limit, if possible.
  */
  if( isCommit && pWal->truncateOnCommit && pWal->mxWalSize>=0 ){