DB_ENV->log_stat

#include <db.h> int DB_ENV->log_stat(DB_ENV *env, DB_LOG_STAT **spp, u_int32_t flags); Description The DB_ENV->log_stat function creates a statistical structure and copies a pointer to it into a user-specified memory location. The flags value must be set to 0 or the following value: DB_STAT_CLEAR Reset statistics after returning their values. Statistical structures are created in allocated memory. If application-specific allocation routines have been declared (see DB_ENV->set_alloc for more information), they are used to allocate the memory; otherwise, the library function malloc(3) is used. The caller is responsible for deallocating the memory. To deallocate the memory, free the memory reference; references inside the returned memory need not be individually freed. The log region statistics are stored in a structure of type DB_LOG_STAT. The following DB_LOG_STAT fields will be filled in: u_int32_t st_magic; The magic number that identifies a file as a log file. u_int32_t st_version; The version of the log file type. int st_mode; The mode of any created log files. u_int32_t st_lg_bsize; The in-memory log record cache size. u_int32_t st_lg_max; The maximum size of any individual file comprising the log. u_int32_t st_w_mbytes; The number of megabytes written to this log. u_int32_t st_w_bytes; The number of bytes over and above st_w_mbytes written to this log. u_int32_t st_wc_mbytes; The number of megabytes written to this log since the last checkpoint. u_int32_t st_wc_bytes; The number of bytes over and above st_wc_mbytes written to this log since the last checkpoint. u_int32_t st_wcount; The number of times the log has been written to disk. u_int32_t st_wcount_fill; The number of times the log has been written to disk because the in-memory log record cache filled up. u_int32_t st_scount; The number of times the log has been flushed to disk. u_int32_t st_cur_file; The current log file number. u_int32_t st_cur_offset; The byte offset in the current log file. u_int32_t st_disk_file; The log file number of the last record known to be on disk. u_int32_t st_disk_offset; The byte offset of the last record known to be on disk. u_int32_t st_cur_offset; The byte offset of the last record known to be on disk. u_int32_t st_flushcommit; The number of log flushes that contained a transaction commit record. u_int32_t st_maxcommitperflush; The maximum number of commits contained in a single log flush. u_int32_t st_mincommitperflush; The minimum number of commits contained in a single log flush that contained a commit.] u_int32_t st_regsize; The size of the region. u_int32_t st_region_wait; The number of times that a thread of control was forced to wait before obtaining the region lock. u_int32_t st_region_nowait; The number of times that a thread of control was able to obtain the region lock without waiting. The DB_ENV->log_stat function returns a non-zero error value on failure and 0 on success. Errors The DB_ENV->log_stat function may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions. If a catastrophic error has occurred, the DB_ENV->log_stat function may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way. See Also DB_ENV->set_lg_bsize, DB_ENV->set_lg_dir, DB_ENV->set_lg_max, DB_ENV->set_lg_regionmax, DB_ENV->log_archive, log_compare, DB_ENV->log_cursor, DB_ENV->log_file, DB_ENV->log_flush, DB_ENV->log_put, DB_ENV->log_register, DB_ENV->log_stat, DB_ENV->log_unregister, DB_LOGC->close and DB_LOGC->get.