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Overview
Comment: | Remove unnecessary MemPage initialization resets in the autovacuum ptrmap processing. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
1b36fbb9f05f3a5844e198b489bff36e |
User & Date: | drh 2016-12-12 18:12:03.591 |
Context
2016-12-12
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23:24 | Add the --mmap option to the speedtest1 program and to the speed-check.sh script that is frequently used to run speedtest1. (check-in: 1a636d5e0e user: drh tags: trunk) | |
18:12 | Remove unnecessary MemPage initialization resets in the autovacuum ptrmap processing. (check-in: 1b36fbb9f0 user: drh tags: trunk) | |
16:08 | Faster operation for large in-memory databases. (check-in: 9675518b33 user: drh tags: trunk) | |
Changes
Changes to src/btree.c.
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3292 3293 3294 3295 3296 3297 3298 | ** map entries for the overflow pages as well. */ static int setChildPtrmaps(MemPage *pPage){ int i; /* Counter variable */ int nCell; /* Number of cells in page pPage */ int rc; /* Return code */ BtShared *pBt = pPage->pBt; | < | < < < < | 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 | ** map entries for the overflow pages as well. */ static int setChildPtrmaps(MemPage *pPage){ int i; /* Counter variable */ int nCell; /* Number of cells in page pPage */ int rc; /* Return code */ BtShared *pBt = pPage->pBt; Pgno pgno = pPage->pgno; assert( sqlite3_mutex_held(pPage->pBt->mutex) ); rc = btreeInitPage(pPage); if( rc!=SQLITE_OK ) return rc; nCell = pPage->nCell; for(i=0; i<nCell; i++){ u8 *pCell = findCell(pPage, i); ptrmapPutOvflPtr(pPage, pCell, &rc); if( !pPage->leaf ){ Pgno childPgno = get4byte(pCell); ptrmapPut(pBt, childPgno, PTRMAP_BTREE, pgno, &rc); } } if( !pPage->leaf ){ Pgno childPgno = get4byte(&pPage->aData[pPage->hdrOffset+8]); ptrmapPut(pBt, childPgno, PTRMAP_BTREE, pgno, &rc); } return rc; } /* ** Somewhere on pPage is a pointer to page iFrom. Modify this pointer so ** that it points to iTo. Parameter eType describes the type of pointer to ** be modified, as follows: |
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3347 3348 3349 3350 3351 3352 3353 | if( eType==PTRMAP_OVERFLOW2 ){ /* The pointer is always the first 4 bytes of the page in this case. */ if( get4byte(pPage->aData)!=iFrom ){ return SQLITE_CORRUPT_BKPT; } put4byte(pPage->aData, iTo); }else{ | < | 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 | if( eType==PTRMAP_OVERFLOW2 ){ /* The pointer is always the first 4 bytes of the page in this case. */ if( get4byte(pPage->aData)!=iFrom ){ return SQLITE_CORRUPT_BKPT; } put4byte(pPage->aData, iTo); }else{ int i; int nCell; int rc; rc = btreeInitPage(pPage); if( rc ) return rc; nCell = pPage->nCell; |
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3383 3384 3385 3386 3387 3388 3389 | if( i==nCell ){ if( eType!=PTRMAP_BTREE || get4byte(&pPage->aData[pPage->hdrOffset+8])!=iFrom ){ return SQLITE_CORRUPT_BKPT; } put4byte(&pPage->aData[pPage->hdrOffset+8], iTo); } | < < | 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 | if( i==nCell ){ if( eType!=PTRMAP_BTREE || get4byte(&pPage->aData[pPage->hdrOffset+8])!=iFrom ){ return SQLITE_CORRUPT_BKPT; } put4byte(&pPage->aData[pPage->hdrOffset+8], iTo); } } return SQLITE_OK; } /* ** Move the open database page pDbPage to location iFreePage in the |
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