2.2.10.2.16 DNSSRV_MEMORY_STATS

The DNSSRV_MEMORY_STATS structure has DNS server statistics related to memory usage for different operations on the server. It provides statistical information about memory usage since the server started or server statistics were last cleared. The structure supports allocations of two types: blocks of common (but implementation-specific) sizes, and blocks of arbitrary sizes. This allows servers to use a separate internal mechanism to optimize allocations of common sizes if they so choose. This structure MUST be formatted as follows:

Header (8 bytes): A structure of type DNSSRV_STAT_HEADER (section 2.2.10.2.1).

Memory (4 bytes): The total memory currently allocated by the servers, in bytes.

Alloc (4 bytes): The cumulative number of times memory was allocated by the server.

Free (4 bytes): The cumulative number of times memory was released by the server.

StdUsed (4 bytes): The cumulative number of times a common-size block of memory was allocated by the server.

StdReturn (4 bytes): The cumulative number of times a common-size block of memory was released by the server.

StdInUse (4 bytes): The total number of common-size blocks of allocated memory currently used by the server.

StdMemory (4 bytes): The total size, in bytes, of common-size blocks that are currently being used by the server.

StdToHeapAlloc (4 bytes): The cumulative number of arbitrary-size blocks of memory allocated from system memory.

StdToHeapFree (4 bytes): The cumulative number of arbitrary-size blocks of memory released to system memory.

StdToHeapInUse (4 bytes): The number of arbitrary-size blocks of memory currently in use.

StdToHeapMemory (4 bytes): The total size of memory, in bytes, currently used by non-standard sized blocks.

StdBlockAlloc (4 bytes): The cumulative number of common-size blocks allocated by the server.

StdBlockUsed (4 bytes): The cumulative number of common-size blocks allocated from an internal free list.

StdBlockReturn (4 bytes): The cumulative number of common-size blocks returned from an internal free list.

StdBlockInUse (4 bytes): The number of common-size blocks currently being used.

StdBlockFreeList (4 bytes): The number of common-size blocks currently on internal free lists.

StdBlockFreeListMemory (4 bytes): The total size of memory, in bytes, of common size blocks currently on internal free lists.

StdBlockMemory (4 bytes): The total size of memory, in bytes, of all currently allocated blocks.

MemTags (624 bytes): An array of 52 DNSSRV_MEMTAG_STATS (section 2.2.10.2.15) specifying memory statistics for various server operations. The table below gives the context applicable to each element of this array, where the Value column indicates the element number.

Value	Meaning
MEMTAG_NONE 0x00000001	Not related to a particular operation.
MEMTAG_PACKET_UDP 0x00000002	UDP Packets.
MEMTAG_PACKET_TCP 0x00000003	TCP Packets.
MEMTAG_NAME 0x00000004	Name-related operations.
MEMTAG_ZONE 0x00000005	Zone operations.
MEMTAG_UPDATE 0x00000006	Name updates.
MEMTAG_UPDATE_LIST 0x00000007	Record update list.
MEMTAG_TIMEOUT 0x00000008	Timeout
MEMTAG_NODEHASH 0x00000009	Node hash.
MEMTAG_DS_DN 0x0000000A	Directory server distinguished name.
MEMTAG_DS_MOD 0x0000000B	Directory server module.
MEMTAG_DS_RECORD 0x0000000C	Directory server records.
MEMTAG_DS_OTHER 0x0000000D	Other directory server related operations.
MEMTAG_THREAD 0x0000000E	Thread management.
MEMTAG_NBSTAT 0x0000000F	NBSTAT [RFC1002] packets operations.
MEMTAG_DNSLIB 0x00000010	DNS library management.
MEMTAG_TABLE 0x00000011	Record table operations.
MEMTAG_SOCKET 0x00000012	Socket operations.
MEMTAG_CONNECTION 0x00000013	Connection establishment / destruction.
MEMTAG_REGISTRY 0x00000014	Registry operations.
MEMTAG_RPC 0x00000015	RPC operations.
MEMTAG_STUFF 0x00000016	Miscellaneous operations.
MEMTAG_FILEBUF 0x00000017	File buffer operations.
MEMTAG_REMOTE 0x00000018	Remote IP address operations.
MEMTAG_EVTCTRL 0x00000019	Event control operations.
MEMTAG_SAFE 0x0000001A	Miscellaneous queuing operations.
MEMTAG_RECORD_UNKNOWN 0x0000001B	Record operations.
MEMTAG_RECORD_FILE 0x0000001C	File-based operations.
MEMTAG_RECORD_DS 0x0000001D	Directory server-based RR operations.
MEMTAG_RECORD_AXFR 0x0000001E	Complete zone transfer operations.
MEMTAG_RECORD_IXFR 0x0000001F	Single Record transfer operations.
MEMTAG_RECORD_DYNUP 0x00000020	RR operations for dynamic update.
MEMTAG_RECORD_ADMIN 0x00000021	RR operations for administration.
MEMTAG_RECORD_AUTO 0x00000022	RR operations for autoconfig.
MEMTAG_RECORD_CACHE 0x00000023	RR operations for cache.
MEMTAG_RECORD_NOEXIST 0x00000024	RR operations for non-existent records.
MEMTAG_RECORD_WINS 0x00000025	RR operations for WINS.
MEMTAG_RECORD_WINSPTR 0x00000026	RR operations for WINS-PTR.
MEMTAG_RECORD_COPY 0x00000027	RR copy operations.
MEMTAG_NODE_UNKNOWN 0x00000028	Node operations for database.
MEMTAG_NODE_FILE 0x00000029	Node operations for file.
MEMTAG_NODE_DS 0x0000002A	Node operations for directory server.
MEMTAG_NODE_AXFR 0x0000002B	Node operations for complete zone transfer.
MEMTAG_NODE_IXFR 0x0000002C	Node operations for single record transfer.
MEMTAG_NODE_DYNUP 0x0000002D	Node operations for dynamic update.
MEMTAG_NODE_ADMIN 0x0000002E	Node operations for administration.
MEMTAG_NODE_AUTO 0x0000002F	Node operations for autoconfig.
MEMTAG_NODE_CACHE 0x00000030	Node operations for cache.
MEMTAG_NODE_NOEXIST 0x00000031	Node operations for non-existent records.
MEMTAG_NODE_WINS 0x00000032	Node operations for WINS.
MEMTAG_NODE_WINSPTR 0x00000033	Node operations for WINS-PTR.
MEMTAG_NODE_COPY 0x00000034	Node operations for copy.