#include <db_cxx.h>

int
DbEnv::rep_stat(DB_REP_STAT **statp, u_int32_t flags);

Description

The DbEnv::rep_stat method returns the replication subsystem statistics.

The flags value must be set to 0 or the following value:

DB_STAT_CLEAR

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 location.

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 individually freed.

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 configured.

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.

Errors

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 DbRunRecoveryException, in which case all subsequent Berkeley DB calls will fail in the same way.

Class

See Also