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Performance optimization to the lookaside-memory disabling mechanism.

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FossilOrigin-Name: 17ce1c49cb0ed6fdd8c7c33431bc2afa217f1092c99b8dd608890a8e7aec7fb1
This commit is contained in:
drh
2019-10-05 14:39:36 +00:00
parent 228a52d973
commit 31f69626df
10 changed files with 58 additions and 47 deletions
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3
src/main.c
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@@ -715,6 +715,7 @@ static int setupLookaside(sqlite3 *db, void *pBuf, int sz, int cnt){
db->lookaside.pInit = 0;
db->lookaside.pFree = 0;
db->lookaside.sz = (u16)sz;
db->lookaside.szTrue = (u16)sz;
if( pStart ){
int i;
LookasideSlot *p;
@@ -733,6 +734,7 @@ static int setupLookaside(sqlite3 *db, void *pBuf, int sz, int cnt){
db->lookaside.pStart = db;
db->lookaside.pEnd = db;
db->lookaside.bDisable = 1;
db->lookaside.sz = 0;
db->lookaside.bMalloced = 0;
db->lookaside.nSlot = 0;
}
@@ -3064,6 +3066,7 @@ static int openDatabase(
db->magic = SQLITE_MAGIC_BUSY;
db->aDb = db->aDbStatic;
db->lookaside.bDisable = 1;
db->lookaside.sz = 0;
assert( sizeof(db->aLimit)==sizeof(aHardLimit) );
memcpy(db->aLimit, aHardLimit, sizeof(db->aLimit));