db_mem_statistics_t Struct Reference

#include <ittia/db.h>

Data Fields
int	have_statistics
db_statitem_t	nreq
struct {
db_statitem_t   sys
db_statitem_t   user
size_t   max_alloc
}	actual_bytes
struct {
db_statitem_t   heap
size_t   max_alloc
}	estimate_blocks
size_t	num_segs
size_t	page_size
size_t	heap_size

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Detailed Description

Statistics for memory allocation with the built-in allocator.

Only memory allocated internally by ITTIA DB is tracked, but the amount can vary with application behavior.

See also:

db_mem_statistics, db_done_ex, db_init_ex

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Field Documentation

int db_mem_statistics_t::have_statistics

True when memory allocation statistics are available.

These statistics are only available when the built-in allocator has been enabled, the

DB_MEMFLAGS_TRACE flag is set, and the QA library is linked.

See also:

db_init_ex

db_statitem_t db_mem_statistics_t::nreq

Number of outstanding allocations.

db_statitem_t db_mem_statistics_t::sys

Total heap memory consumed, including overhead, in bytes.

db_statitem_t db_mem_statistics_t::user

Total allocated space, excluding overhead, in bytes.

size_t db_mem_statistics_t::max_alloc

Maximum individual allocation request, in bytes, since reset.

Maximum number of blocks required for an individual allocation since reset.

size_t db_mem_statistics_t::num_segs

Number of segments used for at least one allocation.

size_t db_mem_statistics_t::page_size

Block size (minimum unit of allocation).

size_t db_mem_statistics_t::heap_size

Total memory configured for the allocator.