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Overview
| Comment: | Update comments to better documentation the new memory measurement functions. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | experimental |
| Files: | files | file ages | folders |
| SHA1: | 620bad035755449c4e6a762f01ef2b1d9e521c7c |
| User & Date: | drh 2010-07-26 11:59:41 |
Context
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2010-07-26
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| 12:05 | Change the way SubProgram objects are deleted so that the code is the same for deletion and measurement. check-in: 00e55102 user: dan tags: experimental | |
| 11:59 | Update comments to better documentation the new memory measurement functions. check-in: 620bad03 user: drh tags: experimental | |
| 11:07 | Make sure all memory from sqlite3DbMalloc() is freed by sqlite3DbFree() and all memory from sqlite3_malloc() is freed by sqlite3_free(). check-in: 629e38a8 user: drh tags: experimental | |
Changes
Changes to src/sqlite.h.in.
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** if a discontinued or unsupported verb is invoked.
**
** <dl>
** ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_USED</dt>
** <dd>This parameter returns the number of lookaside memory slots currently
** checked out.</dd>)^
**
** <dt>SQLITE_DBSTATUS_CACHE_USED</dt>
** <dd>^This parameter returns the approximate number of of bytes of heap
** memory used by all pager caches associated with the database connection.
** ^The highwater mark associated with SQLITE_DBSTATUS_CACHE_USED is always 0.
** </dd>
** </dl>
*/
#define SQLITE_DBSTATUS_LOOKASIDE_USED 0
#define SQLITE_DBSTATUS_CACHE_USED 1
#define SQLITE_DBSTATUS_SCHEMA_USED 2
#define SQLITE_DBSTATUS_STMT_USED 3
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| | | > > > > > > > > > > > > > > > |
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** if a discontinued or unsupported verb is invoked. ** ** <dl> ** ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_USED</dt> ** <dd>This parameter returns the number of lookaside memory slots currently ** checked out.</dd>)^ ** ** ^(<dt>SQLITE_DBSTATUS_CACHE_USED</dt> ** <dd>This parameter returns the approximate number of of bytes of heap ** memory used by all pager caches associated with the database connection.)^ ** ^The highwater mark associated with SQLITE_DBSTATUS_CACHE_USED is always 0. ** ** ^(<dt>SQLITE_DBSTATUS_SCHEMA_USED</dt> ** <dd>This parameter returns the approximate number of of bytes of heap ** and lookaside memory used to store the schema for all databases associated ** with the connection - main, temp, and any [ATTACH]-ed databases.)^ ** ^The full amount of memory used by the schemas is reported, even if the ** schema memory is shared with other database connections due to ** [shared cache mode] being enabled. ** ^The highwater mark associated with SQLITE_DBSTATUS_SCHEMA_USED is always 0. ** ** ^(<dt>SQLITE_DBSTATUS_STMT_USED</dt> ** <dd>This parameter returns the approximate number of of bytes of heap ** and lookaside memory used by all prepared statements associated with ** the database connection.)^ ** ^The highwater mark associated with SQLITE_DBSTATUS_STMT_USED is always 0. ** </dd> ** </dl> */ #define SQLITE_DBSTATUS_LOOKASIDE_USED 0 #define SQLITE_DBSTATUS_CACHE_USED 1 #define SQLITE_DBSTATUS_SCHEMA_USED 2 #define SQLITE_DBSTATUS_STMT_USED 3 |
Changes to src/status.c.
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}
sqlite3BtreeLeaveAll(db);
*pCurrent = totalUsed;
*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++){
................................................................................
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;
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}
sqlite3BtreeLeaveAll(db);
*pCurrent = totalUsed;
*pHighwater = 0;
break;
}
/*
** *pCurrent gets an accurate estimate of the amount of memory used
** to store the schema for all databases (main, temp, and any ATTACHed
** databases. *pHighwater is set to zero.
*/
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++){
................................................................................
db->pnBytesFreed = 0;
*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 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;
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Changes to test/dbstatus.test.
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proc lookaside {db} {
expr { $::lookaside_buffer_size *
[lindex [sqlite3_db_status $db SQLITE_DBSTATUS_LOOKASIDE_USED 0] 1]
}
}
#---------------------------------------------------------------------------
# Run the dbstatus-2 and dbstatus-3 tests with a couple of different
# lookaside buffer sizes.
#
foreach ::lookaside_buffer_size {0 64 120} {
#-------------------------------------------------------------------------
# Tests for SQLITE_DBSTATUS_SCHEMA_USED.
#
|
| |
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proc lookaside {db} {
expr { $::lookaside_buffer_size *
[lindex [sqlite3_db_status $db SQLITE_DBSTATUS_LOOKASIDE_USED 0] 1]
}
}
#---------------------------------------------------------------------------
# Run the dbstatus-2 and dbstatus-3 tests with several of different
# lookaside buffer sizes.
#
foreach ::lookaside_buffer_size {0 64 120} {
#-------------------------------------------------------------------------
# Tests for SQLITE_DBSTATUS_SCHEMA_USED.
#
|