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Experimental code to measure memory consumed by database schemas and prepared statements.

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FossilOrigin-Name: 9aa30342f4de4eff630520ea8e07ad253d3f0877
This commit is contained in:
dan
2010-07-24 11:28:28 +00:00
parent 5419ee5f2f
commit d46def77db
14 changed files with 430 additions and 97 deletions
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61
src/status.c
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@@ -14,6 +14,7 @@
** functionality.
*/
#include "sqliteInt.h"
#include "vdbeInt.h"
/*
** Variables in which to record status information.
@@ -136,6 +137,66 @@ int sqlite3_db_status(
*pHighwater = 0;
break;
}
case SQLITE_DBSTATUS_SCHEMA_USED: {
int i; /* Used to iterate through schemas */
int nByte = 0; /* Used to accumulate return value */
assert( db->pSubProgram==0 );
db->pnBytesFreed = &nByte;
for(i=0; i<db->nDb; i++){
Schema *pSchema = db->aDb[i].pSchema;
if( pSchema ){
HashElem *p;
nByte += sizeof(HashElem) * (
pSchema->tblHash.count
+ pSchema->trigHash.count
+ pSchema->idxHash.count
+ pSchema->fkeyHash.count
);
nByte += sqlite3MallocSize(pSchema->tblHash.ht);
nByte += sqlite3MallocSize(pSchema->trigHash.ht);
nByte += sqlite3MallocSize(pSchema->idxHash.ht);
nByte += sqlite3MallocSize(pSchema->fkeyHash.ht);
for(p=sqliteHashFirst(&pSchema->trigHash); p; p=sqliteHashNext(p)){
sqlite3DeleteTrigger(db, (Trigger*)sqliteHashData(p));
}
for(p=sqliteHashFirst(&pSchema->tblHash); p; p=sqliteHashNext(p)){
sqlite3DeleteTable(db, (Table *)sqliteHashData(p));
}
}
}
db->pnBytesFreed = 0;
*pHighwater = 0;
*pCurrent = nByte;
break;
}
case SQLITE_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){
SubProgram *pSub, *pNext;
sqlite3VdbeDeleteObject(db, pVdbe);
for(pSub=db->pSubProgram; pSub; pSub=pNext){
pNext = pSub->pNext;
pSub->pNext = 0;
}
db->pSubProgram = 0;
}
db->pnBytesFreed = 0;
*pHighwater = 0;
*pCurrent = nByte;
break;
}
default: {
rc = SQLITE_ERROR;
}