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Berkeley DB: DbEnv::repmgr_stat
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DbEnv::repmgr_stat
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#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);
Description: DbEnv::repmgr_stat
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:
u_int32_t st_perm_failed;- 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.
u_int32_t st_msgs_queued;- 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.
u_int32_t st_msgs_dropped;- 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.)
u_int32_t st_connection_drop;- The number of times an existing TCP/IP connection failed.
u_int32_t st_connect_fail;- 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.
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::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:
EINVAL- An
invalid flag value or parameter was specified.
Description: DbEnv::repmgr_stat_print
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.
Parameters
flags- 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.
Class
DbEnv
See Also
Replication and Related Methods
Copyright (c) 1996,2008 Oracle. All rights reserved.