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Overview
| Comment: | Avoid a few unnecessary fstat()s on journal files. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
dbf84705913c0845ca4e75eb30c91536 |
| User & Date: | drh 2016-03-16 19:10:46 |
Context
|
2016-03-16
| ||
| 19:45 | Enhance Lemon so that it reorders the reduce rules such that rules without actions occur at the end and so that the first rule is number 0. This reduces the size of the jump table on the reduce switch, and helps the parser to run faster. check-in: d5712f21 user: drh tags: trunk | |
| 19:34 | Merge the latest enhancements from trunk. check-in: a7978ab6 user: drh tags: begin-concurrent | |
| 19:10 | Avoid a few unnecessary fstat()s on journal files. check-in: dbf84705 user: drh tags: trunk | |
| 18:26 | Fix the query planner so that it is able to use the integer primary key from an index as part of a multi-column constraint. check-in: 96ea9909 user: drh tags: trunk | |
|
2015-12-08
| ||
| 14:37 | Avoid unnecessary work inside of verifyDbFile() in the unix VFS. Closed-Leaf check-in: f3c0579e user: drh tags: unix-vfs-optimization | |
Changes
Changes to src/os_unix.c.
1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 .... 5799 5800 5801 5802 5803 5804 5805 5806 5807 5808 5809 5810 5811 5812 5813 5814 5815 .... 5820 5821 5822 5823 5824 5825 5826 5827 5828 5829 5830 5831 5832 5833 |
** (3) The file has not been renamed or unlinked
**
** Issue sqlite3_log(SQLITE_WARNING,...) messages if anything is not right.
*/
static void verifyDbFile(unixFile *pFile){
struct stat buf;
int rc;
rc = osFstat(pFile->h, &buf);
if( rc!=0 ){
sqlite3_log(SQLITE_WARNING, "cannot fstat db file %s", pFile->zPath);
return;
}
if( buf.st_nlink==0 && (pFile->ctrlFlags & UNIXFILE_DELETE)==0 ){
sqlite3_log(SQLITE_WARNING, "file unlinked while open: %s", pFile->zPath);
................................................................................
#endif
}
#if SQLITE_ENABLE_LOCKING_STYLE
else{
p->openFlags = openFlags;
}
#endif
noLock = eType!=SQLITE_OPEN_MAIN_DB;
#if defined(__APPLE__) || SQLITE_ENABLE_LOCKING_STYLE
if( fstatfs(fd, &fsInfo) == -1 ){
storeLastErrno(p, errno);
robust_close(p, fd, __LINE__);
return SQLITE_IOERR_ACCESS;
}
................................................................................
((unixFile*)pFile)->fsFlags |= SQLITE_FSFLAGS_IS_MSDOS;
}
#endif
/* Set up appropriate ctrlFlags */
if( isDelete ) ctrlFlags |= UNIXFILE_DELETE;
if( isReadonly ) ctrlFlags |= UNIXFILE_RDONLY;
if( noLock ) ctrlFlags |= UNIXFILE_NOLOCK;
if( syncDir ) ctrlFlags |= UNIXFILE_DIRSYNC;
if( flags & SQLITE_OPEN_URI ) ctrlFlags |= UNIXFILE_URI;
#if SQLITE_ENABLE_LOCKING_STYLE
#if SQLITE_PREFER_PROXY_LOCKING
isAutoProxy = 1;
|
> > > > < < < > |
1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 .... 5803 5804 5805 5806 5807 5808 5809 5810 5811 5812 5813 5814 5815 5816 .... 5821 5822 5823 5824 5825 5826 5827 5828 5829 5830 5831 5832 5833 5834 5835 |
** (3) The file has not been renamed or unlinked
**
** Issue sqlite3_log(SQLITE_WARNING,...) messages if anything is not right.
*/
static void verifyDbFile(unixFile *pFile){
struct stat buf;
int rc;
/* These verifications occurs for the main database only */
if( pFile->ctrlFlags & UNIXFILE_NOLOCK ) return;
rc = osFstat(pFile->h, &buf);
if( rc!=0 ){
sqlite3_log(SQLITE_WARNING, "cannot fstat db file %s", pFile->zPath);
return;
}
if( buf.st_nlink==0 && (pFile->ctrlFlags & UNIXFILE_DELETE)==0 ){
sqlite3_log(SQLITE_WARNING, "file unlinked while open: %s", pFile->zPath);
................................................................................
#endif
}
#if SQLITE_ENABLE_LOCKING_STYLE
else{
p->openFlags = openFlags;
}
#endif
#if defined(__APPLE__) || SQLITE_ENABLE_LOCKING_STYLE
if( fstatfs(fd, &fsInfo) == -1 ){
storeLastErrno(p, errno);
robust_close(p, fd, __LINE__);
return SQLITE_IOERR_ACCESS;
}
................................................................................
((unixFile*)pFile)->fsFlags |= SQLITE_FSFLAGS_IS_MSDOS;
}
#endif
/* Set up appropriate ctrlFlags */
if( isDelete ) ctrlFlags |= UNIXFILE_DELETE;
if( isReadonly ) ctrlFlags |= UNIXFILE_RDONLY;
noLock = eType!=SQLITE_OPEN_MAIN_DB;
if( noLock ) ctrlFlags |= UNIXFILE_NOLOCK;
if( syncDir ) ctrlFlags |= UNIXFILE_DIRSYNC;
if( flags & SQLITE_OPEN_URI ) ctrlFlags |= UNIXFILE_URI;
#if SQLITE_ENABLE_LOCKING_STYLE
#if SQLITE_PREFER_PROXY_LOCKING
isAutoProxy = 1;
|