#include <db_cxx.h>

int
DbEnv::repmgr_stat(DB_REPMGR_STAT **statp, u_int32_t flags);

int
DbEnv::repmgr_stat_print(u_int32_t flags);

The DbEnv::repmgr_stat method returns the replication manager statistics.

The DbEnv::repmgr_stat method creates a statistical structure of type DB_REPMGR_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_REPMGR_STAT fields will be filled in:

• The number of times a message critical for maintaining database integrity (for example, a transaction commit), originating at this site, did not receive sufficient acknowledgement from clients, according to the configured acknowledgement policy and acknowledgement timeout.

• The number of outgoing messages which could not be transmitted immediately, due to a full network buffer, and had to be queued for later delivery.

• The number of outgoing messages that were completely dropped, because the outgoing message queue was full. (Berkeley DB replication is tolerant of dropped messages, and will automatically request retransmission of any missing messages as needed.)

• The number of times an existing TCP/IP connection failed.

• The number of times an attempt to open a new TCP/IP connection failed.

The DbEnv::repmgr_stat method may not be called before the DbEnv::open method is called.

The DbEnv::repmgr_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 flags parameter must be set to 0 or the following value:
  DB_STAT_CLEAR
  • Reset statistics after returning their values.
  
  

• The statp parameter references memory into which a pointer to the allocated statistics structure is copied.

The DbEnv::repmgr_stat method may fail and throw DbException, encapsulating one of the following non-zero errors, or return one of the following non-zero errors:

• An invalid flag value or parameter was specified.

The DbEnv::repmgr_stat_print method displays the replication manager statistical information, as described for the DbEnv::repmgr_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::repmgr_stat_print method may not be called before the DbEnv::open method is called.

The DbEnv::repmgr_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.

• The flags parameter must be set to 0 or by bitwise inclusively OR'ing together one or more of the following values:
  DB_STAT_ALL
  • Display all available information.
  DB_STAT_CLEAR
  • Reset statistics after displaying their values.