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Remove unnecessary code from malloc.c. Enhance pcache1.c so that is tries

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to reuse existing pages, rather than create new pages, when SQLite is under
memory pressure.  "Memory pressure" means that SQLITE_CONFIG_PAGECACHE memory
is nearly exhausted or sqlite3_soft_heap_limit() has been reached.

FossilOrigin-Name: 51049479a8577e03cc353f71f6e13a10c8323d91
This commit is contained in:
drh
2010-08-27 12:21:06 +00:00
parent 48d9e01e36
commit 50d1b5f363
7 changed files with 109 additions and 54 deletions
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src/sqliteInt.h
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@@ -2503,6 +2503,7 @@ void sqlite3PageFree(void*);
void sqlite3MemSetDefault(void);
void sqlite3BenignMallocHooks(void (*)(void), void (*)(void));
int sqlite3MemoryAlarm(void (*)(void*, sqlite3_int64, int), void*, sqlite3_int64);
int sqlite3HeapNearlyFull(void);
/*
** On systems with ample stack space and that support alloca(), make