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Overview
| Comment: | Avoid unnecessary calls to FCNTL_SIZE_HINT. Return an error to the user if the file-control invoked by "PRAGMA mmap_size" returns a value other than SQLITE_OK or SQLITE_NOTFOUND. |
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| SHA1: |
40cfde8b4a59a09e52e62f9f029f8d3b |
| User & Date: | dan 2013-05-23 10:13:18 |
Context
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2013-05-23
| ||
| 10:15 | Have the "make fulltest" command run the "mmap" permutation test. (check-in: 82ad373f user: dan tags: trunk) | |
| 10:13 | Avoid unnecessary calls to FCNTL_SIZE_HINT. Return an error to the user if the file-control invoked by "PRAGMA mmap_size" returns a value other than SQLITE_OK or SQLITE_NOTFOUND. (check-in: 40cfde8b user: dan tags: trunk) | |
| 01:40 | Cause the mmap_size PRAGMA to immediately change the mmap space if the database connection is already active. In particular, reducing mmap_size will immediately free up process address space. (check-in: 76117792 user: drh tags: trunk) | |
Changes
Changes to src/pager.c.
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} /* Before the first write, give the VFS a hint of what the final ** file size will be. */ assert( rc!=SQLITE_OK || isOpen(pPager->fd) ); if( rc==SQLITE_OK && (pList->pDirty ? pPager->dbSize : pList->pgno+1)>pPager->dbHintSize ){ sqlite3_int64 szFile = pPager->pageSize * (sqlite3_int64)pPager->dbSize; sqlite3OsFileControlHint(pPager->fd, SQLITE_FCNTL_SIZE_HINT, &szFile); pPager->dbHintSize = pPager->dbSize; } while( rc==SQLITE_OK && pList ){ |
| > |
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} /* Before the first write, give the VFS a hint of what the final ** file size will be. */ assert( rc!=SQLITE_OK || isOpen(pPager->fd) ); if( rc==SQLITE_OK && pPager->dbHintSize<pPager->dbSize && (pList->pDirty || pList->pgno>pPager->dbHintSize) ){ sqlite3_int64 szFile = pPager->pageSize * (sqlite3_int64)pPager->dbSize; sqlite3OsFileControlHint(pPager->fd, SQLITE_FCNTL_SIZE_HINT, &szFile); pPager->dbHintSize = pPager->dbSize; } while( rc==SQLITE_OK && pList ){ |
Changes to src/pragma.c.
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for(ii=db->nDb-1; ii>=0; ii--){
if( db->aDb[ii].pBt && (ii==iDb || pId2->n==0) ){
sqlite3BtreeSetMmapLimit(db->aDb[ii].pBt, sz);
}
}
}
sz = -1;
if( sqlite3_file_control(db,zDb,SQLITE_FCNTL_MMAP_SIZE,&sz)==SQLITE_OK ){
#if SQLITE_MAX_MMAP_SIZE==0
sz = 0;
#endif
returnSingleInt(pParse, "mmap_size", sz);
}
}else
/*
** PRAGMA temp_store
** PRAGMA temp_store = "default"|"memory"|"file"
**
|
| | > > > > |
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for(ii=db->nDb-1; ii>=0; ii--){
if( db->aDb[ii].pBt && (ii==iDb || pId2->n==0) ){
sqlite3BtreeSetMmapLimit(db->aDb[ii].pBt, sz);
}
}
}
sz = -1;
rc = sqlite3_file_control(db, zDb, SQLITE_FCNTL_MMAP_SIZE, &sz);
#if SQLITE_MAX_MMAP_SIZE==0
sz = 0;
#endif
if( rc==SQLITE_OK ){
returnSingleInt(pParse, "mmap_size", sz);
}else if( rc!=SQLITE_NOTFOUND ){
pParse->nErr++;
pParse->rc = rc;
}
}else
/*
** PRAGMA temp_store
** PRAGMA temp_store = "default"|"memory"|"file"
**
|