Berkeley DB: DbEnv::rep

DbEnv::rep_stat

#include <db_cxx.h> int DbEnv::rep_stat(DB_REP_STAT **statp, u_int32_t flags); int DbEnv::rep_stat_print(u_int32_t flags); Description: DbEnv::rep_stat The DbEnv::rep_stat method returns the replication subsystem statistics. The DbEnv::rep_stat method creates a statistical structure of type DB_REP_STAT and copies a pointer to it into a user-specified memory location. Statistical structures are stored in allocated memory. If application-specific allocation routines have been declared (see DbEnv::set_alloc for more information), they are used to allocate the memory; otherwise, the standard C library 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 following DB_REP_STAT fields will be filled in: u_int32_t st_bulk_fills; The number of times the bulk buffer filled up, forcing the buffer content to be sent. u_int32_t st_bulk_overflows; The number of times a record was bigger than the entire bulk buffer, and therefore had to be sent as a singleton. u_int32_t st_bulk_records; The number of records added to a bulk buffer. u_int32_t st_bulk_transfers; The number of bulk buffers transferred (via a call to the application's send function). u_int32_t st_client_rerequests; The number of times this client site received a "re-request" message, indicating that a request it previously sent to another client could not be serviced by that client. (Compare to st_client_svc_miss.) u_int32_t st_client_svc_miss; The number of "request" type messages received by this client that could not be processed, forcing the originating requester to try sending the request to the master (or another client). u_int32_t st_client_svc_req; The number of "request" type messages received by this client. ("Request" messages are usually sent from a client to the master, but a message marked with the DB_REP_ANYWHERE flag in the invocation of the application's send function may be sent to another client instead.) u_int32_t st_dupmasters; The number of duplicate master conditions detected. u_int32_t st_egen; The current election generation number. u_int32_t st_election_cur_winner; The election winner. u_int32_t st_election_gen; The election generation number. DB_LSN st_election_lsn; The maximum LSN of election winner. u_int32_t st_election_nsites; The number sites responding to this site during the last election. u_int32_t st_election_nvotes; The number of votes required in the last election. u_int32_t st_election_priority; The election priority. u_int32_t st_election_sec; The number of seconds the last election took (the total election time is st_election_sec plus st_election_usec). u_int32_t st_election_status; The current election phase (0 if no election is in progress). u_int32_t st_election_tiebreaker; The election tiebreaker value. u_int32_t st_election_usec; The number of microseconds the last election took (the total election time is st_election_sec plus st_election_usec). u_int32_t st_election_votes; The number of votes received in the last election. u_int32_t st_elections; The number of elections held. u_int32_t st_elections_won; The number of elections won. u_int32_t st_env_id; The current environment ID. u_int32_t st_env_priority; The current environment priority. u_int32_t st_gen; The current generation number. u_int32_t st_log_duplicated; The number of duplicate log records received. u_int32_t st_log_queued; The number of log records currently queued. u_int32_t st_log_queued_max; The maximum number of log records ever queued at once. u_int32_t st_log_queued_total; The total number of log records queued. u_int32_t st_log_records; The number of log records received and appended to the log. u_int32_t st_log_requested; The number of log records missed and requested. u_int32_t st_master; The current master environment ID. u_int32_t st_master_changes; The number of times the master has changed. u_int32_t st_msgs_badgen; The number of messages received with a bad generation number. u_int32_t st_msgs_processed; The number of messages received and processed. u_int32_t st_msgs_recover; The number of messages ignored due to pending recovery. u_int32_t st_msgs_send_failures; The number of failed message sends. u_int32_t st_msgs_sent; The number of messages sent. u_int32_t st_newsites; The number of new site messages received. DB_LSN st_next_lsn; In replication environments configured as masters, the next LSN expected. In replication environments configured as clients, the next LSN to be used. u_int32_t st_next_pg; The next page number we expect to receive. int st_nsites; The number of sites used in the last election. u_int32_t st_nthrottles; Transmission limited. This indicates the number of times that data transmission was stopped to limit the amount of data sent in response to a single call to DbEnv::rep_process_message. u_int32_t st_outdated; The number of outdated conditions detected. u_int32_t st_pg_duplicated; The number of duplicate pages received. u_int32_t st_pg_records; The number of pages received and stored. u_int32_t st_pg_requested; The number of pages missed and requested from the master. u_int32_t st_startup_complete; The client site has completed its startup procedures and is now handling live records from the master. u_int32_t st_status; The current replication mode. Set to DB_REP_MASTER if the environment is a replication master, DB_REP_CLIENT if the environment is a replication client, or 0 if replication is not configured. u_int32_t st_txns_applied; The number of transactions applied. DB_LSN st_waiting_lsn; The LSN of the first log record we have after missing log records being waited for, or 0 if no log records are currently missing. u_int32_t st_waiting_pg; The page number of the first page we have after missing pages being waited for, or 0 if no pages are currently missing. The DbEnv::rep_stat method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success. Parameters flags The flags parameter must be set to 0 or the following value: DB_STAT_CLEAR Reset statistics after returning their values. statp The statp parameter references memory into which a pointer to the allocated statistics structure is copied. Errors The DbEnv::rep_stat method may fail and throw DbException, encapsulating one of the following non-zero errors, or return one of the following non-zero errors: EINVAL An invalid flag value or parameter was specified. Description: DbEnv::rep_stat_print The DbEnv::rep_stat_print method displays the replication subsystem statistical information, as described for the DbEnv::rep_stat method. The information is printed to a specified output channel (see the DbEnv::set_msgfile method for more information), or passed to an application callback function (see the DbEnv::set_msgcall method for more information). The DbEnv::rep_stat_print method may not be called before the DbEnv::open method has been called. The DbEnv::rep_stat_print method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success. Parameters flags The flags parameter must be set to 0 or the following value: DB_STAT_ALL Display all available information. Class DbEnv See Also Replication and Related Methods