Change the definition of SQLITE_CONFIG_SCRATCH so that at most one scratch
buffer is used per thread. Use the generic heap memory allocator for the WalIterator object when running a checkpoint. FossilOrigin-Name: 391c9b85abcb5ba300fb2e116384639310c69ed2
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drh
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manifest
18
manifest
@ -1,5 +1,5 @@
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C Improved\sdocumentation\sand\saddition\sof\ssource-code\sevidence\smarks\sfor\sthe\nsqlite3_config()\sinterface.
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D 2014-11-04T13:41:32.444
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C Change\sthe\sdefinition\sof\sSQLITE_CONFIG_SCRATCH\sso\sthat\sat\smost\sone\sscratch\nbuffer\sis\sused\sper\sthread.\s\sUse\sthe\sgeneric\sheap\smemory\sallocator\sfor\sthe\nWalIterator\sobject\swhen\srunning\sa\scheckpoint.
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D 2014-11-04T14:22:27.705
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F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
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F Makefile.in cf57f673d77606ab0f2d9627ca52a9ba1464146a
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F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
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@ -172,7 +172,7 @@ F src/auth.c b56c78ebe40a2110fd361379f7e8162d23f92240
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F src/backup.c 7f841396adfd47507ff670a471162d2bfcda3136
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F src/bitvec.c 19a4ba637bd85f8f63fc8c9bae5ade9fb05ec1cb
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F src/btmutex.c 49ca66250c7dfa844a4d4cb8272b87420d27d3a5
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F src/btree.c 5b6e02a2cb69bfba5d44d0a093b8cc7468fdcf61
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F src/btree.c 11d1262110c2d459b68121833fa3ec6625b1d022
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F src/btree.h 49b408be9c1cd41249076898e0673711071205d8
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F src/btreeInt.h 026d0129724e8f265fdc60d44ec240cf5a4e6179
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F src/build.c 67bb05b1077e0cdaccb2e36bfcbe7a5df9ed31e8
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@ -195,7 +195,7 @@ F src/legacy.c ba1863ea58c4c840335a84ec276fc2b25e22bc4e
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F src/lempar.c 7274c97d24bb46631e504332ccd3bd1b37841770
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F src/loadext.c de741e66e5ddc1598d904d7289239696e40ed994
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F src/main.c c673d0972da4b6826a3e907029faf5be0840cd57
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F src/malloc.c 3c3ac67969612493d435e14b6832793209afd2ec
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F src/malloc.c 740db54387204c9a2eb67c6d98e68b08e9ef4eab
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F src/mem0.c 6a55ebe57c46ca1a7d98da93aaa07f99f1059645
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F src/mem1.c faf615aafd8be74a71494dfa027c113ea5c6615f
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F src/mem2.c f1940d9e91948dd6a908fbb9ce3835c36b5d83c3
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@ -229,7 +229,7 @@ F src/resolve.c 4965007d6497b6a4d7a6d98751cc39712885f952
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F src/rowset.c eccf6af6d620aaa4579bd3b72c1b6395d9e9fa1e
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F src/select.c 428165951748151e87a15295b7357221433e311b
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F src/shell.c 282f8f5278e0c78eb442217531172ec9e1538796
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F src/sqlite.h.in 81c5105a19bd1c16a06d59e729ddc3bb0c26d003
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F src/sqlite.h.in 6e9af739d79f0bea2584b70fb1c54d3bb1a2eab6
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F src/sqlite3.rc 992c9f5fb8285ae285d6be28240a7e8d3a7f2bad
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F src/sqlite3ext.h 17d487c3c91b0b8c584a32fbeb393f6f795eea7d
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F src/sqliteInt.h 8f67ca79e957b8ece7453b8e320b6a996e1b4761
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@ -299,7 +299,7 @@ F src/vdbemem.c 31d8eabb0cd78bfeab4e5124c7363c3e9e54db9f
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F src/vdbesort.c daf87ea542df088ac4607660d09976d36b6bd95d
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F src/vdbetrace.c 7e4222955e07dd707a2f360c0eb73452be1cb010
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F src/vtab.c 2a30791bbd7926b589401bd09c3abb33de563793
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F src/wal.c 10e7de7ce90865a68153f001a61f1d985cd17983
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F src/wal.c 825c948066c7604a07d56e67958cdab210749016
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F src/wal.h df01efe09c5cb8c8e391ff1715cca294f89668a4
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F src/walker.c c253b95b4ee44b21c406e2a1052636c31ea27804
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F src/where.c d5fa1081bf7cb70478ed06489e063695c92ee1e1
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@ -1211,7 +1211,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
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F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
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F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
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F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
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P 6eb03e62a34e8e0964175283587247b0212db604
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R a92bedb66491253840f18dd40e991665
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P 681031a436fdd4cce426d6cd43cbae6b83167d26
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R cb98a95faa41015902ec00cd7a294542
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U drh
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Z 6591907c91e192439bb8b0655576863e
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Z 113a55cc7642fbc8d6bb5b88b140b929
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@ -1 +1 @@
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681031a436fdd4cce426d6cd43cbae6b83167d26
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391c9b85abcb5ba300fb2e116384639310c69ed2
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@ -6650,12 +6650,9 @@ static int balance_nonroot(
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+ nMaxCells*sizeof(u16) /* szCell */
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+ pBt->pageSize; /* aSpace1 */
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/* EVIDENCE-OF: R-37926-08392 SQLite will never request a scratch buffer
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** that is more than 6 times the database page size, except when
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** performing a checkpoint in WAL mode when the scratch buffer request
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** size is a small fraction of the size of the WAL file. */
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/* EVIDENCE-OF: R-28375-38319 SQLite will never request a scratch buffer
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** that is more than 6 times the database page size. */
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assert( szScratch<=6*pBt->pageSize );
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apCell = sqlite3ScratchMalloc( szScratch );
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if( apCell==0 ){
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rc = SQLITE_NOMEM;
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11
src/malloc.c
11
src/malloc.c
@ -377,11 +377,12 @@ void *sqlite3ScratchMalloc(int n){
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#if SQLITE_THREADSAFE==0 && !defined(NDEBUG)
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/* Verify that no more than two scratch allocations per thread
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** are outstanding at one time. (This is only checked in the
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** single-threaded case since checking in the multi-threaded case
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** would be much more complicated.) */
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assert( scratchAllocOut<=1 );
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/* EVIDENCE-OF: R-12970-05880 SQLite will not use more than one scratch
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** buffers per thread.
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**
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** This can only be checked in single-threaded mode.
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*/
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assert( scratchAllocOut==0 );
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if( p ) scratchAllocOut++;
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#endif
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@ -1541,13 +1541,9 @@ struct sqlite3_mem_methods {
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** and the maximum number of scratch allocations (N).)^
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** The first argument must be a pointer to an 8-byte aligned buffer
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** of at least sz*N bytes of memory.
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** ^SQLite will not use more than two scratch buffers per thread and not
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** more than one scratch buffer per thread when not performing
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** a [checkpoint] in [WAL mode].
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** ^SQLite will not use more than one scratch buffers per thread.
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** ^SQLite will never request a scratch buffer that is more than 6
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** times the database page size, except when performing a [checkpoint]
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** in [WAL mode] when the scratch buffer request size is a small fraction
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** of the size of the WAL file.
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** times the database page size.
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** ^If SQLite needs needs additional
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** scratch memory beyond what is provided by this configuration option, then
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** [sqlite3_malloc()] will be used to obtain the memory needed.<p>
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@ -1504,7 +1504,7 @@ static void walMergesort(
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** Free an iterator allocated by walIteratorInit().
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*/
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static void walIteratorFree(WalIterator *p){
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sqlite3ScratchFree(p);
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sqlite3_free(p);
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}
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/*
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@ -1539,7 +1539,7 @@ static int walIteratorInit(Wal *pWal, WalIterator **pp){
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nByte = sizeof(WalIterator)
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+ (nSegment-1)*sizeof(struct WalSegment)
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+ iLast*sizeof(ht_slot);
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p = (WalIterator *)sqlite3ScratchMalloc(nByte);
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p = (WalIterator *)sqlite3_malloc(nByte);
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if( !p ){
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return SQLITE_NOMEM;
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}
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@ -1549,7 +1549,7 @@ static int walIteratorInit(Wal *pWal, WalIterator **pp){
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/* Allocate temporary space used by the merge-sort routine. This block
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** of memory will be freed before this function returns.
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*/
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aTmp = (ht_slot *)sqlite3ScratchMalloc(
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aTmp = (ht_slot *)sqlite3_malloc(
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sizeof(ht_slot) * (iLast>HASHTABLE_NPAGE?HASHTABLE_NPAGE:iLast)
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);
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if( !aTmp ){
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@ -1586,7 +1586,7 @@ static int walIteratorInit(Wal *pWal, WalIterator **pp){
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p->aSegment[i].aPgno = (u32 *)aPgno;
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}
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}
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sqlite3ScratchFree(aTmp);
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sqlite3_free(aTmp);
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if( rc!=SQLITE_OK ){
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walIteratorFree(p);
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