Berkeley DB: DB_ENV->rep

DB_ENV->rep_stat

#include <db.h> int DB_ENV->rep_stat(DB_ENV *env, DB_REP_STAT **statp, u_int32_t flags); int DB_ENV->rep_stat_print(DB_ENV *env, u_int32_t flags); Description: DB_ENV->rep_stat The DB_ENV->rep_stat method returns the replication subsystem statistics. The DB_ENV->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 DB_ENV->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 originally detected at this site. 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 times log records were 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_max_lease_sec;The number of seconds of the longest lease (the total lease time is st_max_lease_sec plus st_max_lease_usec). u_int32_t st_max_lease_usec;The number of microseconds of the longest lease (the total lease time is st_max_lease_sec plus st_max_lease_usec). DB_LSN st_max_perm_lsn;The LSN of the maximum permanent log record, or 0 if there are no permanent log records. 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. u_int32_t 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 DB_ENV->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_startsync_delayed;The number of times the client had to delay the start of a cache flush operation (initiated by the master for an impending checkpoint) because it was missing some previous log record(s). 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 DB_ENV->rep_stat method may not be called before the DB_ENV->open method is called. The DB_ENV->rep_stat method returns a non-zero error value on failure and 0 on success. Parameters flagsThe flags parameter must be set to 0 or the following value: DB_STAT_CLEARReset statistics after returning their values. statpThe statp parameter references memory into which a pointer to the allocated statistics structure is copied. Errors The DB_ENV->rep_stat method may fail and return one of the following non-zero errors: EINVALAn invalid flag value or parameter was specified. Description: DB_ENV->rep_stat_print The DB_ENV->rep_stat_print method displays the replication subsystem statistical information, as described for the DB_ENV->rep_stat method. The information is printed to a specified output channel (see the DB_ENV->set_msgfile method for more information), or passed to an application callback function (see the DB_ENV->set_msgcall method for more information). The DB_ENV->rep_stat_print method may not be called before the DB_ENV->open method is called. The DB_ENV->rep_stat_print method returns a non-zero error value on failure and 0 on success. Parameters flagsThe flags parameter must be set to 0 or by bitwise inclusively OR'ing together one or more of the following values: DB_STAT_ALLDisplay all available information. DB_STAT_CLEARReset statistics after displaying their values. Class DB_ENV See Also Replication and Related Methods