memory_constants.h

#ifndef _MEMORY_CONSTANTS_H_
#define _MEMORY_CONSTANTS_H_
/* This file contains constants used to provide approximate memory use
estimates for data objects.   For arrays and lists of simple types that
is not difficult to do, but for map, multimap, and set containers that
cannot be done without traversing the entire tree.   As assumption in
mspass is that such containers consume small amounts of memory relative to
the time series data and if we commit a small error in estimating memory
use in those containers it will not cause issues.  These constants may
require tuning with experiences.   Initial values set May 2023 by glp
are guesses.
*/
namespace mspass::utility {
namespace memory_constants {
const size_t KEY_AVERAGE_SIZE(8);
const size_t MD_AVERAGE_SIZE(KEY_AVERAGE_SIZE + 16);
const size_t HISTORYDATA_AVERAGE_SIZE(64);
const size_t ELOG_AVERAGE_SIZE(128);
const size_t DATA_GAP_AVERAGE_SIZE(2 * sizeof(double) + sizeof(size_t));
} // namespace memory_constants
} // namespace mspass::utility
#endif