DbEnv::rep_stat(DB_REP_STAT **statp, u_int32_t flags);
The DbEnv::rep_stat method returns the replication subsystem statistics.
The flags value must be set to 0 or
the following value:
- Reset statistics after returning their values.
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
Statistical structures are created 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
library malloc(3) interface 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
The following DB_REP_STAT fields will be filled in:
- u_int32_t st_stat;
- 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, DB_REP_LOGSONLY if the
environment is a log-files-only replica, or 0 if replication is not
- 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.
- DB_LSN st_waiting_lsn;
- The LSN of the first missed log record being waited for, or 0 if no log
records are currently missing.
- u_int32_t st_dupmasters;
- The number of duplicate master conditions detected.
- 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.
- u_int32_t st_outdated;
- The number of outdated conditions detected.
- u_int32_t st_txns_applied;
- The number of transactions applied.
- 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_election_status;
- The current election phase (0 if no election is in progress).
- 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 expected to participate in elections.
- 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_election_priority;
- The election priority.
- u_int32_t st_election_tiebreaker;
- The election tiebreaker value.
- u_int32_t st_election_votes;
- The votes received this election round.
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.
The DbEnv::rep_stat method may fail and throw an exception or return a non-zero error for errors specified for other Berkeley DB and C library or system methods.
If a catastrophic error has occurred, the DbEnv::rep_stat method may fail and
either return DB_RUNRECOVERY or throw a
in which case all subsequent Berkeley DB calls will fail in the same way.
Replication and Related Methods
Copyright Sleepycat Software