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Overview
Comment: | Fix memory leaks. Add the LSM_CONFIG_MAX_FREELIST parameter to make testing free-list overflow easier. |
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Timelines: | family | ancestors | descendants | both | multi-process |
Files: | files | file ages | folders |
SHA1: |
3e1ecb95c9e680f5533d889b4eda9515 |
User & Date: | dan 2012-08-30 18:01:26.942 |
Context
2012-08-30
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20:01 | Remove dead code. Run "lomem" tests with max-freelist set to 4. check-in: d6c6889249 user: dan tags: multi-process | |
18:01 | Fix memory leaks. Add the LSM_CONFIG_MAX_FREELIST parameter to make testing free-list overflow easier. check-in: 3e1ecb95c9 user: dan tags: multi-process | |
2012-08-29
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19:45 | Fix some of the problems with very large free-block lists. check-in: dc91e55841 user: dan tags: multi-process | |
Changes
Changes to lsm-test/lsmtest_tdb3.c.
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572 573 574 575 576 577 578 579 580 581 582 583 584 585 | { "block_size", 0, LSM_CONFIG_BLOCK_SIZE }, { "safety", 0, LSM_CONFIG_SAFETY }, { "autowork", 0, LSM_CONFIG_AUTOWORK }, { "log_size", 0, LSM_CONFIG_LOG_SIZE }, { "mmap", 0, LSM_CONFIG_MMAP }, { "use_log", 0, LSM_CONFIG_USE_LOG }, { "nmerge", 0, LSM_CONFIG_NMERGE }, { "worker_nmerge", 1, LSM_CONFIG_NMERGE }, { 0, 0 } }; const char *z = zStr; while( z[0] && pDb ){ const char *zStart; | > | 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 | { "block_size", 0, LSM_CONFIG_BLOCK_SIZE }, { "safety", 0, LSM_CONFIG_SAFETY }, { "autowork", 0, LSM_CONFIG_AUTOWORK }, { "log_size", 0, LSM_CONFIG_LOG_SIZE }, { "mmap", 0, LSM_CONFIG_MMAP }, { "use_log", 0, LSM_CONFIG_USE_LOG }, { "nmerge", 0, LSM_CONFIG_NMERGE }, { "max_freelist", 0, LSM_CONFIG_MAX_FREELIST }, { "worker_nmerge", 1, LSM_CONFIG_NMERGE }, { 0, 0 } }; const char *z = zStr; while( z[0] && pDb ){ const char *zStart; |
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726 727 728 729 730 731 732 | } int test_lsm_lomem_open( const char *zFilename, int bClear, TestDb **ppDb ){ | > | | 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 | } int test_lsm_lomem_open( const char *zFilename, int bClear, TestDb **ppDb ){ const char *zCfg = "page_size=256 block_size=65536 write_buffer=16384 max_freelist=4"; return testLsmOpen(zCfg, zFilename, bClear, ppDb); } lsm_db *tdb_lsm(TestDb *pDb){ if( pDb->pMethods->xClose==test_lsm_close ){ return ((LsmDb *)pDb)->db; } |
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Changes to src/lsm.h.
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163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 | ** LSM_CONFIG_USE_LOG ** A read/write boolean parameter. True (the default) to use the log ** file normally. False otherwise. ** ** LSM_CONFIG_NMERGE ** A read/write integer parameter. The minimum number of segments to ** merge together at a time. Default value 4. */ #define LSM_CONFIG_WRITE_BUFFER 1 #define LSM_CONFIG_PAGE_SIZE 2 #define LSM_CONFIG_SAFETY 3 #define LSM_CONFIG_BLOCK_SIZE 4 #define LSM_CONFIG_AUTOWORK 5 #define LSM_CONFIG_LOG_SIZE 6 #define LSM_CONFIG_MMAP 7 #define LSM_CONFIG_USE_LOG 8 #define LSM_CONFIG_NMERGE 9 #define LSM_SAFETY_OFF 0 #define LSM_SAFETY_NORMAL 1 #define LSM_SAFETY_FULL 2 /* | > > > > > > > > > > | 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | ** LSM_CONFIG_USE_LOG ** A read/write boolean parameter. True (the default) to use the log ** file normally. False otherwise. ** ** LSM_CONFIG_NMERGE ** A read/write integer parameter. The minimum number of segments to ** merge together at a time. Default value 4. ** ** LSM_CONFIG_MAX_FREELIST ** A read/write integer parameter. The maximum number of free-list ** entries that are stored in a database checkpoint (the others are ** stored elsewhere in the database). ** ** There is no reason for an application to configure or query this ** parameter. It is only present because configuring a small value ** makes certain parts of the lsm code easier to test. */ #define LSM_CONFIG_WRITE_BUFFER 1 #define LSM_CONFIG_PAGE_SIZE 2 #define LSM_CONFIG_SAFETY 3 #define LSM_CONFIG_BLOCK_SIZE 4 #define LSM_CONFIG_AUTOWORK 5 #define LSM_CONFIG_LOG_SIZE 6 #define LSM_CONFIG_MMAP 7 #define LSM_CONFIG_USE_LOG 8 #define LSM_CONFIG_NMERGE 9 #define LSM_CONFIG_MAX_FREELIST 10 #define LSM_SAFETY_OFF 0 #define LSM_SAFETY_NORMAL 1 #define LSM_SAFETY_FULL 2 /* |
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Changes to src/lsmInt.h.
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137 138 139 140 141 142 143 144 145 146 147 148 149 150 | /* Lock definitions */ #define LSM_LOCK_WRITER 1 #define LSM_LOCK_WORKER 2 #define LSM_LOCK_CHECKPOINTER 3 #define LSM_LOCK_READER(i) ((i) + LSM_LOCK_CHECKPOINTER + 1) /* ** A string that can grow by appending. */ struct LsmString { lsm_env *pEnv; /* Run-time environment */ int n; /* Size of string. -1 indicates error */ | > > > > > > | 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 | /* Lock definitions */ #define LSM_LOCK_WRITER 1 #define LSM_LOCK_WORKER 2 #define LSM_LOCK_CHECKPOINTER 3 #define LSM_LOCK_READER(i) ((i) + LSM_LOCK_CHECKPOINTER + 1) /* ** Hard limit on the number of free-list entries that may be stored in ** a checkpoint (the remainder are stored as a system record in the LSM). ** See also LSM_CONFIG_MAX_FREELIST. */ #define LSM_MAX_FREELIST_ENTRIES 100 /* ** A string that can grow by appending. */ struct LsmString { lsm_env *pEnv; /* Run-time environment */ int n; /* Size of string. -1 indicates error */ |
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262 263 264 265 266 267 268 269 270 271 272 273 274 275 | int bAutowork; /* Configured by LSM_CONFIG_AUTOWORK */ int nTreeLimit; /* Configured by LSM_CONFIG_WRITE_BUFFER */ int nMerge; /* Configured by LSM_CONFIG_NMERGE */ int nLogSz; /* Configured by LSM_CONFIG_LOG_SIZE */ int bUseLog; /* Configured by LSM_CONFIG_USE_LOG */ int nDfltPgsz; /* Configured by LSM_CONFIG_PAGE_SIZE */ int nDfltBlksz; /* Configured by LSM_CONFIG_BLOCK_SIZE */ /* Sub-system handles */ FileSystem *pFS; /* On-disk portion of database */ Database *pDatabase; /* Database shared data */ /* Client transaction context */ Snapshot *pClient; /* Client snapshot (non-NULL in read trans) */ | > | 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 | int bAutowork; /* Configured by LSM_CONFIG_AUTOWORK */ int nTreeLimit; /* Configured by LSM_CONFIG_WRITE_BUFFER */ int nMerge; /* Configured by LSM_CONFIG_NMERGE */ int nLogSz; /* Configured by LSM_CONFIG_LOG_SIZE */ int bUseLog; /* Configured by LSM_CONFIG_USE_LOG */ int nDfltPgsz; /* Configured by LSM_CONFIG_PAGE_SIZE */ int nDfltBlksz; /* Configured by LSM_CONFIG_BLOCK_SIZE */ int nMaxFreelist; /* Configured by LSM_CONFIG_MAX_FREELIST */ /* Sub-system handles */ FileSystem *pFS; /* On-disk portion of database */ Database *pDatabase; /* Database shared data */ /* Client transaction context */ Snapshot *pClient; /* Client snapshot (non-NULL in read trans) */ |
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456 457 458 459 460 461 462 | }; #define LSM_INITIAL_SNAPSHOT_ID 11 /* ** Functions from file "lsm_ckpt.c". */ int lsmCheckpointWrite(lsm_db *); | < | 463 464 465 466 467 468 469 470 471 472 473 474 475 476 | }; #define LSM_INITIAL_SNAPSHOT_ID 11 /* ** Functions from file "lsm_ckpt.c". */ int lsmCheckpointWrite(lsm_db *); int lsmCheckpointLevels(lsm_db *, int, void **, int *); int lsmCheckpointLoadLevels(lsm_db *pDb, void *pVal, int nVal); int lsmCheckpointOverflow(lsm_db *pDb, void **, int *, int *); int lsmCheckpointRecover(lsm_db *); int lsmCheckpointDeserialize(lsm_db *, int, u32 *, Snapshot **); |
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Changes to src/lsm_ckpt.c.
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109 110 111 112 113 114 115 | ** size of all level records in a checkpoint is 12*40=480 integers. */ #define LSM_MAX_RHS_SEGMENTS 40 /* ** LARGE NUMBERS OF FREELIST ENTRIES: ** | > | | | > > > < | 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 | ** size of all level records in a checkpoint is 12*40=480 integers. */ #define LSM_MAX_RHS_SEGMENTS 40 /* ** LARGE NUMBERS OF FREELIST ENTRIES: ** ** There is also a limit (LSM_MAX_FREELIST_ENTRIES - defined in lsmInt.h) ** on the number of free-list entries stored in a checkpoint. Since each ** free-list entry consists of 3 integers, the maximum free-list size is ** 3*100=300 integers. Combined with the limit on rhs segments defined ** above, this ensures that a checkpoint always fits within a 4096 byte ** meta page. ** ** If the database contains more than 100 free blocks, the "overflow" flag ** in the checkpoint header is set and the remainder are stored in the ** system FREELIST entry in the LSM (along with user data). The value ** accompanying the FREELIST key in the LSM is, like a checkpoint, an array ** of 32-bit big-endian integers. As follows: ** ** For each entry: ** a. Block number of free block. ** b. MSW of associated checkpoint id. ** c. LSW of associated checkpoint id. ** ** The number of entries is not required - it is implied by the size of the ** value blob containing the integer array. ** ** Note that the limit defined by LSM_MAX_FREELIST_ENTRIES is a hard limit. ** The actual value used may be configured using LSM_CONFIG_MAX_FREELIST. */ /* ** The argument to this macro must be of type u32. On a little-endian ** architecture, it returns the u32 value that results from interpreting ** the 4 bytes as a big-endian value. On a big-endian architecture, it ** returns the value that would be produced by intepreting the 4 bytes ** of the input value as a little-endian integer. |
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351 352 353 354 355 356 357 | for(i=0; i<CKPT_APPENDLIST_SIZE; i++){ ckptSetValue(p, iOut++, aiAppend[i], pRc); } *piOut = iOut; }; | | > > > > > > > > < < < < < < | 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 | for(i=0; i<CKPT_APPENDLIST_SIZE; i++){ ckptSetValue(p, iOut++, aiAppend[i], pRc); } *piOut = iOut; }; static int ckptExportSnapshot( lsm_db *pDb, /* Connection handle */ int nOvfl, /* Number of free-list entries in LSM */ int bLog, /* True to update log-offset fields */ i64 iId, /* Checkpoint id */ int bCksum, /* If true, include checksums */ void **ppCkpt, /* OUT: Buffer containing checkpoint */ int *pnCkpt /* OUT: Size of checkpoint in bytes */ ){ int rc = LSM_OK; /* Return Code */ FileSystem *pFS = pDb->pFS; /* File system object */ Snapshot *pSnap = pDb->pWorker; /* Worker snapshot */ int nAll = 0; /* Number of levels in db */ int nHdrLevel = 0; /* Number of levels in checkpoint */ int iLevel; /* Used to count out nHdrLevel levels */ int iOut = 0; /* Current offset in aCkpt[] */ Level *pLevel; /* Level iterator */ int i; /* Iterator used while serializing freelist */ CkptBuffer ckpt; int nFree; nFree = pSnap->freelist.nEntry; if( nOvfl>=0 ){ nFree -= nOvfl; }else{ nOvfl = pDb->pShmhdr->aWorker[CKPT_HDR_OVFL]; } /* Initialize the output buffer */ memset(&ckpt, 0, sizeof(CkptBuffer)); ckpt.pEnv = pDb->pEnv; iOut = CKPT_HDR_SIZE; /* Write the log offset into the checkpoint. */ ckptExportLog(pDb, bLog, &ckpt, &iOut, &rc); /* Write the append-point list */ ckptExportAppendlist(pDb, &ckpt, &iOut, &rc); /* Figure out how many levels will be written to the checkpoint. */ for(pLevel=lsmDbSnapshotLevel(pSnap); pLevel; pLevel=pLevel->pNext) nAll++; nHdrLevel = nAll; assert( nHdrLevel>0 ); /* Serialize nHdrLevel levels. */ iLevel = 0; for(pLevel=lsmDbSnapshotLevel(pSnap); iLevel<nHdrLevel; pLevel=pLevel->pNext){ ckptExportLevel(pLevel, &ckpt, &iOut, &rc); iLevel++; } /* Write the freelist */ if( rc==LSM_OK ){ ckptSetValue(&ckpt, iOut++, nFree, &rc); for(i=0; i<nFree; i++){ FreelistEntry *p = &pSnap->freelist.aEntry[i]; ckptSetValue(&ckpt, iOut++, p->iBlk, &rc); ckptSetValue(&ckpt, iOut++, (p->iId >> 32) & 0xFFFFFFFF, &rc); ckptSetValue(&ckpt, iOut++, p->iId & 0xFFFFFFFF, &rc); } |
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431 432 433 434 435 436 437 438 439 440 441 442 443 444 | }else{ ckptSetValue(&ckpt, iOut, 0, &rc); ckptSetValue(&ckpt, iOut+1, 0, &rc); } iOut += 2; assert( iOut<=1024 ); *ppCkpt = (void *)ckpt.aCkpt; if( pnCkpt ) *pnCkpt = sizeof(u32)*iOut; return rc; } /* | > > > > > > | 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 | }else{ ckptSetValue(&ckpt, iOut, 0, &rc); ckptSetValue(&ckpt, iOut+1, 0, &rc); } iOut += 2; assert( iOut<=1024 ); #if 0 lsmLogMessage(pDb, rc, "ckptExportSnapshot(): id=%d freelist: %d/%d", (int)iId, nFree, nOvfl ); #endif *ppCkpt = (void *)ckpt.aCkpt; if( pnCkpt ) *pnCkpt = sizeof(u32)*iOut; return rc; } /* |
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656 657 658 659 660 661 662 | int nRet; Snapshot *p = pDb->pWorker; assert( lsmShmAssertWorker(pDb) ); assert( (pnVal==0)==(ppVal==0) ); assert( pnOvfl ); | > > > > > > | | 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 | int nRet; Snapshot *p = pDb->pWorker; assert( lsmShmAssertWorker(pDb) ); assert( (pnVal==0)==(ppVal==0) ); assert( pnOvfl ); if( ppVal && p->nFreelistOvfl ){ rc = lsmCheckpointLoadOverflow(pDb, &p->freelist); if( rc!=LSM_OK ) return rc; p->nFreelistOvfl = 0; } nRet = p->freelist.nEntry - pDb->nMaxFreelist; if( nRet<=0 ){ nRet = 0; if( ppVal ){ *pnVal = 0; *ppVal = 0; } }else if( ppVal ){ |
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939 940 941 942 943 944 945 | if( ckptChecksumOk(pShm->aWorker)==0 ){ int nInt = (int)pShm->aClient[CKPT_HDR_NCKPT]; memcpy(pShm->aWorker, pShm->aClient, nInt*sizeof(u32)); if( ckptChecksumOk(pShm->aWorker)==0 ) return LSM_CORRUPT_BKPT; } rc = lsmCheckpointDeserialize(pDb, 1, pShm->aWorker, &pDb->pWorker); | < < < < < | 956 957 958 959 960 961 962 963 964 965 966 967 968 969 | if( ckptChecksumOk(pShm->aWorker)==0 ){ int nInt = (int)pShm->aClient[CKPT_HDR_NCKPT]; memcpy(pShm->aWorker, pShm->aClient, nInt*sizeof(u32)); if( ckptChecksumOk(pShm->aWorker)==0 ) return LSM_CORRUPT_BKPT; } rc = lsmCheckpointDeserialize(pDb, 1, pShm->aWorker, &pDb->pWorker); assert( rc!=LSM_OK || lsmFsIntegrityCheck(pDb) ); return rc; } int lsmCheckpointDeserialize( lsm_db *pDb, int bInclFreelist, /* If true, deserialize free-list */ |
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1046 1047 1048 1049 1050 1051 1052 | int lsmCheckpointSaveWorker(lsm_db *pDb, int bFlush, int nOvfl){ Snapshot *pSnap = pDb->pWorker; ShmHeader *pShm = pDb->pShmhdr; void *p = 0; int n = 0; int rc; | | | 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 | int lsmCheckpointSaveWorker(lsm_db *pDb, int bFlush, int nOvfl){ Snapshot *pSnap = pDb->pWorker; ShmHeader *pShm = pDb->pShmhdr; void *p = 0; int n = 0; int rc; rc = ckptExportSnapshot(pDb, nOvfl, bFlush, pSnap->iId+1, 1, &p, &n); if( rc!=LSM_OK ) return rc; assert( ckptChecksumOk((u32 *)p) ); assert( n<=LSM_META_PAGE_SIZE ); memcpy(pShm->aWorker, p, n); lsmShmBarrier(pDb); memcpy(pShm->aClient, p, n); |
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Changes to src/lsm_main.c.
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77 78 79 80 81 82 83 84 85 86 87 88 89 90 | pDb->bAutowork = 1; pDb->eSafety = LSM_SAFETY_NORMAL; pDb->xCmp = xCmp; pDb->nLogSz = LSM_DEFAULT_LOG_SIZE; pDb->nDfltPgsz = LSM_PAGE_SIZE; pDb->nDfltBlksz = LSM_BLOCK_SIZE; pDb->nMerge = LSM_DEFAULT_NMERGE; pDb->bUseLog = 1; pDb->iReader = -1; return LSM_OK; } lsm_env *lsm_get_env(lsm_db *pDb){ assert( pDb->pEnv ); | > | 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 | pDb->bAutowork = 1; pDb->eSafety = LSM_SAFETY_NORMAL; pDb->xCmp = xCmp; pDb->nLogSz = LSM_DEFAULT_LOG_SIZE; pDb->nDfltPgsz = LSM_PAGE_SIZE; pDb->nDfltBlksz = LSM_BLOCK_SIZE; pDb->nMerge = LSM_DEFAULT_NMERGE; pDb->nMaxFreelist = LSM_MAX_FREELIST_ENTRIES; pDb->bUseLog = 1; pDb->iReader = -1; return LSM_OK; } lsm_env *lsm_get_env(lsm_db *pDb){ assert( pDb->pEnv ); |
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425 426 427 428 429 430 431 432 433 434 435 436 437 438 | case LSM_CONFIG_NMERGE: { int *piVal = va_arg(ap, int *); if( *piVal>1 ) pDb->nMerge = *piVal; *piVal = pDb->nMerge; break; } default: rc = LSM_MISUSE; break; } va_end(ap); | > > > > > > > > > | 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 | case LSM_CONFIG_NMERGE: { int *piVal = va_arg(ap, int *); if( *piVal>1 ) pDb->nMerge = *piVal; *piVal = pDb->nMerge; break; } case LSM_CONFIG_MAX_FREELIST: { int *piVal = va_arg(ap, int *); if( *piVal>=2 && *piVal<=LSM_MAX_FREELIST_ENTRIES ){ pDb->nMaxFreelist = *piVal; } *piVal = pDb->nMaxFreelist; break; } default: rc = LSM_MISUSE; break; } va_end(ap); |
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Changes to src/lsm_sorted.c.
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1558 1559 1560 1561 1562 1563 1564 | ){ int iRet; if( pLeft->pPg==0 ){ iRet = 1; }else if( pRight->pPg==0 ){ iRet = 0; }else{ | > > | | | 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 | ){ int iRet; if( pLeft->pPg==0 ){ iRet = 1; }else if( pRight->pPg==0 ){ iRet = 0; }else{ int res = rtTopic(pLeft->eType) - rtTopic(pRight->eType); if( res==0 ){ res = pCsr->xCmp(pLeft->pKey, pLeft->nKey, pRight->pKey, pRight->nKey); } if( res==0 || (res<0 && bLargest==0) || (res>0 && bLargest) ){ iRet = 0; }else{ iRet = 1; } } return iRet; |
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3632 3633 3634 3635 3636 3637 3638 | Level *p = pLevel; Level **pp; pNew->nRight = nMerge; pNew->iAge = pLevel->iAge+1; for(i=0; i<nMerge; i++){ pNext = p->pNext; pNew->aRhs[i] = p->lhs; | | | 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 | Level *p = pLevel; Level **pp; pNew->nRight = nMerge; pNew->iAge = pLevel->iAge+1; for(i=0; i<nMerge; i++){ pNext = p->pNext; pNew->aRhs[i] = p->lhs; sortedFreeLevel(pDb->pEnv, p); p = pNext; } /* Replace the old levels with the new. */ pTopLevel = lsmDbSnapshotLevel(pDb->pWorker); pNew->pNext = p; for(pp=&pTopLevel; *pp!=pLevel; pp=&((*pp)->pNext)); |
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4050 4051 4052 4053 4054 4055 4056 | assert( pDb->pWorker==0 ); rc = lsmBeginWork(pDb); if( rc==LSM_OK ){ rc = sortedWork(pDb, nPage, bOptimize, &nWrite); } if( rc==LSM_OK && nWrite ){ | > | > | > | 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 | assert( pDb->pWorker==0 ); rc = lsmBeginWork(pDb); if( rc==LSM_OK ){ rc = sortedWork(pDb, nPage, bOptimize, &nWrite); } if( rc==LSM_OK && nWrite ){ int nExpectOvfl = 0; lsmCheckpointOverflow(pDb, 0, 0, &nExpectOvfl); rc = lsmSortedFlushDb(pDb); if( rc==LSM_OK && nExpectOvfl ){ rc = sortedNewToplevel(pDb, 0, &nOvfl); } } if( nWrite ){ lsmFinishWork(pDb, 0, nOvfl, &rc); }else{ int rcdummy = LSM_BUSY; lsmFinishWork(pDb, 0, 0, &rcdummy); |
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