DbEnv::rep_stat
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#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
Copyright (c) 1996-2005 Sleepycat Software, Inc. - All rights reserved.