[tarantool-patches] Re: [PATCH v1 06/28] sql: disable lookaside system

Vladislav Shpilevoy v.shpilevoy at tarantool.org
Fri Jun 14 01:25:04 MSK 2019


Thanks for the patch!

You removed it, not disabled. You have removed its core part, but
left a pile of surroundings.

Consider my review fixes below and on the branch
in a separate commit.

======================================================

diff --git a/src/box/sql/global.c b/src/box/sql/global.c
index e394db8d0..0bbd8c2fd 100644
--- a/src/box/sql/global.c
+++ b/src/box/sql/global.c
@@ -177,8 +177,6 @@ SQL_WSD struct sqlConfig sqlConfig = {
 	SQL_ALLOW_COVERING_INDEX_SCAN,	/* bUseCis */
 	0x7ffffffe,		/* mxStrlen */
 	0,			/* neverCorrupt */
-	512,			/* szLookaside */
-	125,			/* nLookaside */
 	0,			/* nStmtSpill */
 	(void *)0,		/* pHeap */
 	0,			/* nHeap */
diff --git a/src/box/sql/malloc.c b/src/box/sql/malloc.c
index a7549db48..3ccb36e5e 100644
--- a/src/box/sql/malloc.c
+++ b/src/box/sql/malloc.c
@@ -481,13 +481,6 @@ sqlMallocSize(void *p)
 	return sql_sized_sizeof(p);
 }
 
-int
-sqlDbMallocSize(void *p)
-{
-	assert(p != 0);
-	return sql_sized_sizeof(p);
-}
-
 sql_uint64
 sql_msize(void *p)
 {
@@ -518,7 +511,7 @@ sql_free(void *p)
 static SQL_NOINLINE void
 measureAllocationSize(sql * db, void *p)
 {
-	*db->pnBytesFreed += sqlDbMallocSize(p);
+	*db->pnBytesFreed += sqlMallocSize(p);
 }
 
 /*
@@ -632,24 +625,9 @@ sqlDbMallocZero(sql * db, u64 n)
 	return p;
 }
 
-/* Finish the work of sqlDbMallocRawNN for the unusual and
- * slower case when the allocation cannot be fulfilled using lookaside.
- */
-static SQL_NOINLINE void *
-dbMallocRawFinish(sql * db, u64 n)
-{
-	void *p;
-	assert(db != 0);
-	p = sqlMalloc(n);
-	if (!p)
-		sqlOomFault(db);
-	return p;
-}
-
 /*
- * Allocate memory, either lookaside (if possible) or heap.
- * If the allocation fails, set the mallocFailed flag in
- * the connection pointer.
+ * Allocate heap memory. If the allocation fails, set the
+ * mallocFailed flag in the connection pointer.
  *
  * If db!=0 and db->mallocFailed is true (indicating a prior malloc
  * failure on the same database connection) then always return 0.
@@ -684,7 +662,10 @@ sqlDbMallocRawNN(sql * db, u64 n)
 	assert(db != NULL && db->pnBytesFreed == NULL);
 	if (db->mallocFailed)
 		return NULL;
-	return dbMallocRawFinish(db, n);
+	void *p = sqlMalloc(n);
+	if (p == NULL)
+		sqlOomFault(db);
+	return p;
 }
 
 /* Forward declaration */
@@ -784,17 +765,13 @@ sqlSetString(char **pz, sql * db, const char *zNew)
 
 /*
  * Call this routine to record the fact that an OOM (out-of-memory) error
- * has happened.  This routine will set db->mallocFailed, and also
- * temporarily disable the lookaside memory allocator and interrupt
- * any running VDBEs.
+ * has happened.  This routine will set db->mallocFailed.
  */
 void
 sqlOomFault(sql * db)
 {
-	if (db->mallocFailed == 0 && db->bBenignMalloc == 0) {
+	if (db->mallocFailed == 0 && db->bBenignMalloc == 0)
 		db->mallocFailed = 1;
-		db->lookaside.bDisable++;
-	}
 }
 
 /*
@@ -807,11 +784,8 @@ sqlOomFault(sql * db)
 void
 sqlOomClear(sql * db)
 {
-	if (db->mallocFailed && db->nVdbeExec == 0) {
+	if (db->mallocFailed && db->nVdbeExec == 0)
 		db->mallocFailed = 0;
-		assert(db->lookaside.bDisable > 0);
-		db->lookaside.bDisable--;
-	}
 }
 
 /*
diff --git a/src/box/sql/parse.y b/src/box/sql/parse.y
index bc577a580..3ccb4f8ea 100644
--- a/src/box/sql/parse.y
+++ b/src/box/sql/parse.y
@@ -106,15 +106,6 @@ struct LimitVal {
 */
 struct TrigEvent { int a; IdList * b; };
 
-/*
-** Disable lookaside memory allocation for objects that might be
-** shared across database connections.
-*/
-static void disableLookaside(Parse *pParse){
-  pParse->disableLookaside++;
-  pParse->db->lookaside.bDisable++;
-}
-
 } // end %include
 
 // Input is a single SQL command
@@ -178,11 +169,10 @@ cmd ::= ROLLBACK TO savepoint_opt nm(X). {
 ///////////////////// The CREATE TABLE statement ////////////////////////////
 //
 cmd ::= create_table create_table_args.
-create_table ::= createkw TABLE ifnotexists(E) nm(Y). {
+create_table ::= CREATE TABLE ifnotexists(E) nm(Y). {
   create_table_def_init(&pParse->create_table_def, &Y, E);
   pParse->create_table_def.new_space = sqlStartTable(pParse, &Y);
 }
-createkw(A) ::= CREATE(A).  {disableLookaside(pParse);}
 
 %type ifnotexists {int}
 ifnotexists(A) ::= .              {A = 0;}
@@ -408,7 +398,7 @@ ifexists(A) ::= .            {A = 0;}
 
 ///////////////////// The CREATE VIEW statement /////////////////////////////
 //
-cmd ::= createkw(X) VIEW ifnotexists(E) nm(Y) eidlist_opt(C)
+cmd ::= CREATE(X) VIEW ifnotexists(E) nm(Y) eidlist_opt(C)
           AS select(S). {
   if (!pParse->parse_only) {
     create_view_def_init(&pParse->create_view_def, &Y, &X, C, S, E);
@@ -1409,7 +1399,7 @@ paren_exprlist(A) ::= LP exprlist(X) RP.  {A = X;}
 
 ///////////////////////////// The CREATE INDEX command ///////////////////////
 //
-cmd ::= createkw uniqueflag(U) INDEX ifnotexists(NE) nm(X)
+cmd ::= CREATE uniqueflag(U) INDEX ifnotexists(NE) nm(X)
         ON nm(Y) LP sortlist(Z) RP. {
   struct SrcList *src_list = sql_src_list_append(pParse->db,0,&Y);
   if (src_list == NULL) {
@@ -1512,7 +1502,7 @@ plus_num(A) ::= number(A).
 minus_num(A) ::= MINUS number(X).     {A = X;}
 //////////////////////////// The CREATE TRIGGER command /////////////////////
 
-cmd ::= createkw trigger_decl(A) BEGIN trigger_cmd_list(S) END(Z). {
+cmd ::= CREATE trigger_decl(A) BEGIN trigger_cmd_list(S) END(Z). {
   Token all;
   all.z = A.z;
   all.n = (int)(Z.z - A.z) + Z.n;
diff --git a/src/box/sql/prepare.c b/src/box/sql/prepare.c
index 2b3ac29ae..4ac8698ec 100644
--- a/src/box/sql/prepare.c
+++ b/src/box/sql/prepare.c
@@ -295,12 +295,6 @@ sql_parser_destroy(Parse *parser)
 	sqlDbFree(db, parser->aLabel);
 	sql_expr_list_delete(db, parser->pConstExpr);
 	create_table_def_destroy(&parser->create_table_def);
-	if (db != NULL) {
-		assert(db->lookaside.bDisable >=
-		       parser->disableLookaside);
-		db->lookaside.bDisable -= parser->disableLookaside;
-	}
-	parser->disableLookaside = 0;
 	switch (parser->parsed_ast_type) {
 	case AST_TYPE_SELECT:
 		sql_select_delete(db, parser->parsed_ast.select);
diff --git a/src/box/sql/printf.c b/src/box/sql/printf.c
index c364055c1..add0be474 100644
--- a/src/box/sql/printf.c
+++ b/src/box/sql/printf.c
@@ -874,7 +874,7 @@ sqlStrAccumEnlarge(StrAccum * p, int N)
 			if (!isMalloced(p) && p->nChar > 0)
 				memcpy(zNew, p->zText, p->nChar);
 			p->zText = zNew;
-			p->nAlloc = sqlDbMallocSize(zNew);
+			p->nAlloc = sqlMallocSize(zNew);
 			p->printfFlags |= SQL_PRINTF_MALLOCED;
 		} else {
 			sqlStrAccumReset(p);
@@ -999,9 +999,8 @@ sqlStrAccumReset(StrAccum * p)
  * Initialize a string accumulator.
  *
  * p:     The accumulator to be initialized.
- * db:    Pointer to a database connection.  May be NULL.  Lookaside
- *        memory is used if not NULL. db->mallocFailed is set appropriately
- *        when not NULL.
+ * db:    Pointer to a database connection.  May be NULL.
+ *        db->mallocFailed is set appropriately when not NULL.
  * zBase: An initial buffer.  May be NULL in which case the initial buffer
  *        is malloced.
  * n:     Size of zBase in bytes.  If total space requirements never exceed
diff --git a/src/box/sql/select.c b/src/box/sql/select.c
index b6752930b..d58ae8573 100644
--- a/src/box/sql/select.c
+++ b/src/box/sql/select.c
@@ -2003,10 +2003,6 @@ sqlResultSetOfSelect(Parse * pParse, Select * pSelect)
 	struct space *space = sql_ephemeral_space_new(pParse, NULL);
 	if (space == NULL)
 		return NULL;
-	/* The sqlResultSetOfSelect() is only used in contexts where lookaside
-	 * is disabled
-	 */
-	assert(db->lookaside.bDisable);
 	sqlColumnsFromExprList(pParse, pSelect->pEList, space->def);
 	sqlSelectAddColumnTypeAndCollation(pParse, space->def, pSelect);
 	if (db->mallocFailed)
diff --git a/src/box/sql/sqlInt.h b/src/box/sql/sqlInt.h
index 544b61aa8..54e9ae931 100644
--- a/src/box/sql/sqlInt.h
+++ b/src/box/sql/sqlInt.h
@@ -186,16 +186,13 @@
 #endif
 
 #if defined(SQL_SYSTEM_MALLOC) \
-  + defined(SQL_ZERO_MALLOC) \
-  + defined(SQL_MEMDEBUG)>1
+  + defined(SQL_ZERO_MALLOC) > 1
 #error "Two or more of the following compile-time configuration options\
  are defined but at most one is allowed:\
- SQL_SYSTEM_MALLOC, SQL_MEMDEBUG,\
- SQL_ZERO_MALLOC"
+ SQL_SYSTEM_MALLOC, SQL_ZERO_MALLOC"
 #endif
 #if defined(SQL_SYSTEM_MALLOC) \
-  + defined(SQL_ZERO_MALLOC) \
-  + defined(SQL_MEMDEBUG)==0
+  + defined(SQL_ZERO_MALLOC) == 0
 #define SQL_SYSTEM_MALLOC 1
 #endif
 
@@ -683,7 +680,6 @@ sql_os_end(void);
 
 #define SQL_CONFIG_SCRATCH       6	/* void*, int sz, int N */
 #define SQL_CONFIG_MEMSTATUS     9	/* boolean */
-#define SQL_CONFIG_LOOKASIDE    13	/* int int */
 #define SQL_CONFIG_LOG          16	/* xFunc, void* */
 #define SQL_CONFIG_URI          17	/* int */
 #define SQL_CONFIG_COVERING_INDEX_SCAN 20	/* int */
@@ -692,7 +688,6 @@ sql_os_end(void);
 #define SQL_CONFIG_PMASZ               24	/* unsigned int szPma */
 #define SQL_CONFIG_STMTJRNL_SPILL      25	/* int nByte */
 
-#define SQL_DBCONFIG_LOOKASIDE             1001	/* void* int int */
 #define SQL_DBCONFIG_ENABLE_FKEY           1002	/* int int* */
 #define SQL_DBCONFIG_ENABLE_TRIGGER        1003	/* int int* */
 #define SQL_DBCONFIG_NO_CKPT_ON_CLOSE      1006	/* int int* */
@@ -841,20 +836,6 @@ sql_uri_parameter(const char *zFilename,
 #define SQL_ACCESS_READWRITE 1	/* Used by PRAGMA temp_store_directory */
 #define SQL_ACCESS_READ      2	/* Unused */
 
-#define SQL_DBSTATUS_LOOKASIDE_USED       0
-#define SQL_DBSTATUS_CACHE_USED           1
-#define SQL_DBSTATUS_SCHEMA_USED          2
-#define SQL_DBSTATUS_STMT_USED            3
-#define SQL_DBSTATUS_LOOKASIDE_HIT        4
-#define SQL_DBSTATUS_LOOKASIDE_MISS_SIZE  5
-#define SQL_DBSTATUS_LOOKASIDE_MISS_FULL  6
-#define SQL_DBSTATUS_CACHE_HIT            7
-#define SQL_DBSTATUS_CACHE_MISS           8
-#define SQL_DBSTATUS_CACHE_WRITE          9
-#define SQL_DBSTATUS_DEFERRED_FKS        10
-#define SQL_DBSTATUS_CACHE_USED_SHARED   11
-#define SQL_DBSTATUS_MAX                 11	/* Largest defined DBSTATUS */
-
 const char *
 sql_sql(sql_stmt * pStmt);
 
@@ -1334,8 +1315,6 @@ typedef struct FuncDef FuncDef;
 typedef struct FuncDefHash FuncDefHash;
 typedef struct IdList IdList;
 typedef struct KeyClass KeyClass;
-typedef struct Lookaside Lookaside;
-typedef struct LookasideSlot LookasideSlot;
 typedef struct NameContext NameContext;
 typedef struct Parse Parse;
 typedef struct PrintfArguments PrintfArguments;
@@ -1378,41 +1357,6 @@ typedef int VList;
  */
 #define SQL_N_LIMIT (SQL_LIMIT_WORKER_THREADS+1)
 
-/*
- * Lookaside malloc is a set of fixed-size buffers that can be used
- * to satisfy small transient memory allocation requests for objects
- * associated with a particular database connection.  The use of
- * lookaside malloc provides a significant performance enhancement
- * (approx 10%) by avoiding numerous malloc/free requests while parsing
- * SQL statements.
- *
- * The Lookaside structure holds configuration information about the
- * lookaside malloc subsystem.  Each available memory allocation in
- * the lookaside subsystem is stored on a linked list of LookasideSlot
- * objects.
- *
- * Lookaside allocations are only allowed for objects that are associated
- * with a particular database connection.  Hence, schema information cannot
- * be stored in lookaside because in shared cache mode the schema information
- * is shared by multiple database connections.  Therefore, while parsing
- * schema information, the Lookaside.bEnabled flag is cleared so that
- * lookaside allocations are not used to construct the schema objects.
- */
-struct Lookaside {
-	u32 bDisable;		/* Only operate the lookaside when zero */
-	u16 sz;			/* Size of each buffer in bytes */
-	u8 bMalloced;		/* True if pStart obtained from sql_malloc() */
-	int nOut;		/* Number of buffers currently checked out */
-	int mxOut;		/* Highwater mark for nOut */
-	int anStat[3];		/* 0: hits.  1: size misses.  2: full misses */
-	LookasideSlot *pFree;	/* List of available buffers */
-	void *pStart;		/* First byte of available memory space */
-	void *pEnd;		/* First byte past end of available space */
-};
-struct LookasideSlot {
-	LookasideSlot *pNext;	/* Next buffer in the list of free buffers */
-};
-
 /*
  * A hash table for built-in function definitions.  (Application-defined
  * functions use a regular table table from hash.h.)
@@ -1466,7 +1410,6 @@ struct sql {
 	void *pUpdateArg;
 	void (*xUpdateCallback) (void *, int, const char *, const char *,
 				 sql_int64);
-	Lookaside lookaside;	/* Lookaside malloc configuration */
 	Hash aFunc;		/* Hash table of connection functions */
 	int *pnBytesFreed;	/* If not NULL, increment this in DbFree() */
 };
@@ -2572,7 +2515,6 @@ struct Parse {
 	u8 isMultiWrite;	/* True if statement may modify/insert multiple rows */
 	u8 hasCompound;		/* Need to invoke convertCompoundSelectToSubquery() */
 	u8 okConstFactor;	/* OK to factor out constants */
-	u8 disableLookaside;	/* Number of times lookaside has been disabled */
 	u8 nColCache;		/* Number of entries in aColCache[] */
 	int nRangeReg;		/* Size of the temporary register block */
 	int iRangeReg;		/* First register in temporary register block */
@@ -2847,7 +2789,7 @@ struct TriggerStep {
  * do not necessarily know how big the string will be in the end.
  */
 struct StrAccum {
-	sql *db;		/* Optional database for lookaside.  Can be NULL */
+	sql *db;		/* Database for temporary buffers. */
 	char *zBase;		/* A base allocation.  Not from malloc. */
 	char *zText;		/* The string collected so far */
 	u32 nChar;		/* Length of the string so far */
@@ -2875,8 +2817,6 @@ struct sqlConfig {
 	int bUseCis;		/* Use covering indices for full-scans */
 	int mxStrlen;		/* Maximum string length */
 	int neverCorrupt;	/* Database is always well-formed */
-	int szLookaside;	/* Default lookaside buffer size */
-	int nLookaside;		/* Default lookaside buffer count */
 	int nStmtSpill;		/* Stmt-journal spill-to-disk threshold */
 	void *pHeap;		/* Heap storage space */
 	int nHeap;		/* Size of pHeap[] */
@@ -3020,7 +2960,6 @@ void *sqlDbReallocOrFree(sql *, void *, u64);
 void *sqlDbRealloc(sql *, void *, u64);
 void sqlDbFree(sql *, void *);
 int sqlMallocSize(void *);
-int sqlDbMallocSize(void *);
 void *sqlScratchMalloc(int);
 void sqlScratchFree(void *);
 void *sqlPageMalloc(int);
diff --git a/src/box/sql/status.c b/src/box/sql/status.c
index bc170c8e5..950d5f409 100644
--- a/src/box/sql/status.c
+++ b/src/box/sql/status.c
@@ -158,140 +158,3 @@ sql_status(int op, int *pCurrent, int *pHighwater, int resetFlag)
 	}
 	return rc;
 }
-
-/*
- * Query status information for a single database connection
- */
-int
-sql_db_status(sql * db,	/* The database connection whose status is desired */
-		  int op,	/* Status verb */
-		  int *pCurrent,	/* Write current value here */
-		  int *pHighwater,	/* Write high-water mark here */
-		  int resetFlag	/* Reset high-water mark if true */
-    )
-{
-	int rc = SQL_OK;	/* Return code */
-	switch (op) {
-	case SQL_DBSTATUS_LOOKASIDE_USED:{
-			*pCurrent = db->lookaside.nOut;
-			*pHighwater = db->lookaside.mxOut;
-			if (resetFlag) {
-				db->lookaside.mxOut = db->lookaside.nOut;
-			}
-			break;
-		}
-
-	case SQL_DBSTATUS_LOOKASIDE_HIT:
-	case SQL_DBSTATUS_LOOKASIDE_MISS_SIZE:
-	case SQL_DBSTATUS_LOOKASIDE_MISS_FULL:{
-			testcase(op == SQL_DBSTATUS_LOOKASIDE_HIT);
-			testcase(op == SQL_DBSTATUS_LOOKASIDE_MISS_SIZE);
-			testcase(op == SQL_DBSTATUS_LOOKASIDE_MISS_FULL);
-			assert((op - SQL_DBSTATUS_LOOKASIDE_HIT) >= 0);
-			assert((op - SQL_DBSTATUS_LOOKASIDE_HIT) < 3);
-			*pCurrent = 0;
-			*pHighwater =
-			    db->lookaside.anStat[op -
-						 SQL_DBSTATUS_LOOKASIDE_HIT];
-			if (resetFlag) {
-				db->lookaside.anStat[op -
-						     SQL_DBSTATUS_LOOKASIDE_HIT]
-				    = 0;
-			}
-			break;
-		}
-
-		/*
-		 * Return an approximation for the amount of memory currently used
-		 * by all pagers associated with the given database connection.  The
-		 * highwater mark is meaningless and is returned as zero.
-		 */
-	case SQL_DBSTATUS_CACHE_USED_SHARED:
-	case SQL_DBSTATUS_CACHE_USED:{
-			int totalUsed = 0;
-			*pCurrent = totalUsed;
-			*pHighwater = 0;
-			break;
-		}
-
-		/*
-		 * *pCurrent gets an accurate estimate of the amount of memory used
-		 * to store the schema for database. *pHighwater is set to zero.
-		 */
-	case SQL_DBSTATUS_SCHEMA_USED:{
-			int nByte = 0;	/* Used to accumulate return value */
-
-			*pHighwater = 0;
-			*pCurrent = nByte;
-			break;
-		}
-
-		/*
-		 * *pCurrent gets an accurate estimate of the amount of memory used
-		 * to store all prepared statements.
-		 * *pHighwater is set to zero.
-		 */
-	case SQL_DBSTATUS_STMT_USED:{
-			struct Vdbe *pVdbe;	/* Used to iterate through VMs */
-			int nByte = 0;	/* Used to accumulate return value */
-
-			db->pnBytesFreed = &nByte;
-			for (pVdbe = db->pVdbe; pVdbe; pVdbe = pVdbe->pNext) {
-				sqlVdbeClearObject(db, pVdbe);
-				sqlDbFree(db, pVdbe);
-			}
-			db->pnBytesFreed = 0;
-
-			*pHighwater = 0;	/* IMP: R-64479-57858
-			*/
-			*pCurrent = nByte;
-
-			break;
-		}
-
-		/*
-		 * Set *pCurrent to the total cache hits or misses encountered by all
-		 * pagers the database handle is connected to. *pHighwater is always set
-		 * to zero.
-		 */
-	case SQL_DBSTATUS_CACHE_HIT:
-	case SQL_DBSTATUS_CACHE_MISS:
-	case SQL_DBSTATUS_CACHE_WRITE:{
-			int nRet = 0;
-			assert(SQL_DBSTATUS_CACHE_MISS ==
-			       SQL_DBSTATUS_CACHE_HIT + 1);
-			assert(SQL_DBSTATUS_CACHE_WRITE ==
-			       SQL_DBSTATUS_CACHE_HIT + 2);
-
-			*pHighwater = 0;	/* IMP: R-42420-56072
-			*/
-			/* IMP: R-54100-20147 */
-			/* IMP: R-29431-39229 */
-			*pCurrent = nRet;
-			break;
-		}
-
-		/* Set *pCurrent to non-zero if there are unresolved deferred foreign
-		 * key constraints.  Set *pCurrent to zero if all foreign key constraints
-		 * have been satisfied.  The *pHighwater is always set to zero.
-		 */
-	case SQL_DBSTATUS_DEFERRED_FKS:{
-			*pHighwater = 0;	/* IMP: R-11967-56545
-			*/
-			const struct txn *ptxn = in_txn();
-
-			if (!ptxn || !ptxn->psql_txn) {
-				*pCurrent = 0;
-				break;
-			}
-			const struct sql_txn *psql_txn = ptxn->psql_txn;
-			*pCurrent = psql_txn->fk_deferred_count > 0;
-			break;
-		}
-
-	default:{
-			rc = SQL_ERROR;
-		}
-	}
-	return rc;
-}
diff --git a/src/box/sql/vdbeaux.c b/src/box/sql/vdbeaux.c
index fbe5338f9..44a3812f0 100644
--- a/src/box/sql/vdbeaux.c
+++ b/src/box/sql/vdbeaux.c
@@ -192,7 +192,7 @@ growOpArray(Vdbe * v, int nOp)
 	assert(nNew >= (p->nOpAlloc + nOp));
 	pNew = sqlDbRealloc(p->db, v->aOp, nNew * sizeof(Op));
 	if (pNew) {
-		p->szOpAlloc = sqlDbMallocSize(pNew);
+		p->szOpAlloc = sqlMallocSize(pNew);
 		p->nOpAlloc = p->szOpAlloc / sizeof(Op);
 		v->aOp = pNew;
 	}
diff --git a/src/box/sql/vdbemem.c b/src/box/sql/vdbemem.c
index 2bb9bd3e4..366933695 100644
--- a/src/box/sql/vdbemem.c
+++ b/src/box/sql/vdbemem.c
@@ -70,7 +70,7 @@ sqlVdbeCheckMemInvariants(Mem * p)
 
 	/* The szMalloc field holds the correct memory allocation size */
 	assert(p->szMalloc == 0
-	       || p->szMalloc == sqlDbMallocSize(p->zMalloc));
+	       || p->szMalloc == sqlMallocSize(p->zMalloc));
 
 	/* If p holds a string or blob, the Mem.z must point to exactly
 	 * one of the following:
@@ -112,7 +112,7 @@ sqlVdbeMemGrow(Mem * pMem, int n, int bPreserve)
 	testcase(bPreserve && pMem->z == 0);
 
 	assert(pMem->szMalloc == 0
-	       || pMem->szMalloc == sqlDbMallocSize(pMem->zMalloc));
+	       || pMem->szMalloc == sqlMallocSize(pMem->zMalloc));
 	if (pMem->szMalloc < n) {
 		if (n < 32)
 			n = 32;
@@ -131,8 +131,7 @@ sqlVdbeMemGrow(Mem * pMem, int n, int bPreserve)
 			pMem->szMalloc = 0;
 			return SQL_NOMEM;
 		} else {
-			pMem->szMalloc =
-			    sqlDbMallocSize(pMem->zMalloc);
+			pMem->szMalloc = sqlMallocSize(pMem->zMalloc);
 		}
 	}
 
@@ -1006,7 +1005,7 @@ sqlVdbeMemSetStr(Mem * pMem,	/* Memory cell to set to string value */
 	} else if (xDel == SQL_DYNAMIC) {
 		sqlVdbeMemRelease(pMem);
 		pMem->zMalloc = pMem->z = (char *)z;
-		pMem->szMalloc = sqlDbMallocSize(pMem->zMalloc);
+		pMem->szMalloc = sqlMallocSize(pMem->zMalloc);
 	} else {
 		sqlVdbeMemRelease(pMem);
 		pMem->z = (char *)z;
diff --git a/src/box/sql/whereexpr.c b/src/box/sql/whereexpr.c
index a954b17f1..faff37bb9 100644
--- a/src/box/sql/whereexpr.c
+++ b/src/box/sql/whereexpr.c
@@ -107,7 +107,7 @@ whereClauseInsert(WhereClause * pWC, Expr * p, u16 wtFlags)
 		if (pOld != pWC->aStatic) {
 			sqlDbFree(db, pOld);
 		}
-		pWC->nSlot = sqlDbMallocSize(pWC->a) / sizeof(pWC->a[0]);
+		pWC->nSlot = sqlMallocSize(pWC->a) / sizeof(pWC->a[0]);
 	}
 	pTerm = &pWC->a[idx = pWC->nTerm++];
 	if (p && ExprHasProperty(p, EP_Unlikely)) {
diff --git a/test/sql-tap/join.test.lua b/test/sql-tap/join.test.lua
index ef6060927..f0ab16ad2 100755
--- a/test/sql-tap/join.test.lua
+++ b/test/sql-tap/join.test.lua
@@ -1072,13 +1072,6 @@ jointest("join-12.6", 66, {1, 'The number of tables in a join 66 exceeds the lim
 jointest("join-12.7", 127, {1, 'The number of tables in a join 127 exceeds the limit (64)'})
 jointest("join-12.8", 128, {1, 'The number of tables in a join 128 exceeds the limit (64)'})
 jointest("join-12.9", 1000, {1, 'The number of tables in a join 1000 exceeds the limit (64)'})
--- If sql is built with sql_MEMDEBUG, then the huge number of realloc()
--- calls made by the following test cases are too time consuming to run.
--- Without sql_MEMDEBUG, realloc() is fast enough that these are not
--- a problem.
---if X(0, "X!capable", [["pragma&&compileoption_diags"]]) then
---    if X(703, "X!cmd", [=[["expr","[lsearch [db eval {PRAGMA compile_options}] MEMDEBUG]<0"]]=])
--- then
 jointest("join-12.10", 65534, {1, 'The number of tables in a join 65534 exceeds the limit (64)'})
 jointest("join-12.11", 65535, {1, 'The number of tables in a join 65535 exceeds the limit (64)'})
 jointest("join-12.12", 65536, {1, 'The number of tables in a join 65536 exceeds the limit (64)'})
diff --git a/test/sql-tap/triggerA.test.lua b/test/sql-tap/triggerA.test.lua
index aa4771b31..fac51ca14 100755
--- a/test/sql-tap/triggerA.test.lua
+++ b/test/sql-tap/triggerA.test.lua
@@ -326,35 +326,4 @@ test:do_test(
         -- </triggerA-2.11>
     })
 
--- # Only run the reamining tests if memory debugging is turned on.
--- #
--- ifcapable !memdebug {
---    puts "Skipping triggerA malloc tests: not compiled with -Dsql_MEMDEBUG..."
---    finish_test
---    return
--- }
--- source $testdir/malloc_common.tcl
--- # Save a copy of the current database configuration.
--- #
--- db close
--- forcedelete test.db-triggerA
--- copy_file test.db test.db-triggerA
--- sql db test.db
--- # Run malloc tests on the INSTEAD OF trigger firing.
--- #
--- do_malloc_test triggerA-3 -tclprep {
---   db close
---   forcedelete test.db test.db-journal
---   forcecopy test.db-triggerA test.db
---   sql db test.db
---   sql_extended_result_codes db 1
---   db eval {SELECT * FROM v5; -- warm up the cache}
--- } -sqlbody {
---    DELETE FROM v5 WHERE x=5;
---    UPDATE v5 SET b=b+9900000 WHERE x BETWEEN 3 AND 5;
--- }
--- # Clean up the saved database copy.
--- #
--- forcedelete test.db-triggerA
 test:finish_test()
-




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