The DatabaseEnvironment type exposes the following members.
 Properties
Properties
| Name | Description | |
|---|---|---|
|  | AutoCommit | 
            If true, database operations for which no explicit transaction
            handle was specified, and which modify databases in the database
            environment, will be automatically enclosed within a transaction.
             | 
|  | BackupBufferSize | 
            The size of the buffer, in bytes, to read from the database during a
            hot backup.
             | 
|  | BackupHandler | 
            Sets the IBackup interface to be used when performing
            hot backups.
             This interface is used to override the default behavior used by the Backup(String, BackupOptions) and BackupDatabase(String, String, Boolean) methods. | 
|  | BackupReadCount | 
            The number of pages to read before pausing during the hot backup.
             Increasing this value increases the amount of I/O the backup process performs for any given time interval. If your application is already heavily I/O bound, setting this value to a lower number may help to improve your overall data throughput by reducing the I/O demands placed on your system. By default, all pages are read without a pause. | 
|  | BackupReadSleepDuration | 
            The number of microseconds to sleep between batches of reads during
            a hot backup.
             Increasing this value decreases the amount of I/O the backup process performs for any given time interval. If your application is already heavily I/O bound, setting this value to a higher number may help to improve your overall data throughput by reducing the I/O demands placed on your system. | 
|  | BackupWriteDirect | 
            If true, direct I/O is used when writing pages to the disk during a 
            hot backup.
             For some environments, direct I/O can provide faster write throughput, but usually it is slower because the OS buffer pool offers asynchronous activity. | 
|  | CacheSize | 
            The size of the shared memory buffer pool -- that is, the cache.
             | 
|  | CDB_ALLDB | 
            If true, Berkeley DB Concurrent Data Store applications will perform
            locking on an environment-wide basis rather than on a per-database
            basis. 
             | 
|  | Create | 
            If true, Berkeley DB subsystems will create any underlying files, as
            necessary.
             | 
|  | DataDirs | 
            The array of directories where database files are stored.
             | 
|  | DeadlockResolution | 
            The deadlock detector configuration, specifying what lock request(s)
            should be rejected. As transactions acquire locks on behalf of a
            single locker ID, rejecting a lock request associated with a
            transaction normally requires the transaction be aborted.
             | 
|  | EncryptAlgorithm | 
            The algorithm used by the Berkeley DB library to perform encryption
            and decryption. 
             | 
|  | ErrorFeedback | 
            The mechanism for reporting detailed error messages to the
            application.
             | 
|  | ErrorPrefix | 
            The prefix string that appears before error messages issued by
            Berkeley DB.
             | 
|  | EventNotify | 
            A delegate which is called to notify the process of specific
            Berkeley DB events. 
             | 
|  | Feedback | 
            Monitor progress within long running operations.
             | 
|  | ForceFlush | 
            If true, flush database writes to the backing disk before returning
            from the write system call, rather than flushing database writes
            explicitly in a separate system call, as necessary.
             | 
|  | FreeThreaded | 
            If true, the object is free-threaded; that is, concurrently usable
            by multiple threads in the address space.
             | 
|  | Home | 
            The database environment home directory.
             | 
|  | HotbackupInProgress | 
            Whether there is any hot backup in progress.
             | 
|  | InitLockCount | 
            The number of locks allocated when the environment is created
             | 
|  | InitLockerCount | 
            The number of lockers allocated when the environment is created
             | 
|  | InitLockObjectCount | 
            The number of lock objects allocated when the environment is created
             | 
|  | InitLogIdCount | 
            The number of log identifier objects allocated when the
            environment is created
             | 
|  | InitMutexes | 
            The initial number of mutexes allocated
             | 
|  | InitRegions | 
            If true, Berkeley DB will page-fault shared regions into memory when
            initially creating or joining a Berkeley DB environment.
             | 
|  | InitThreadCount | 
            The number of thread objects allocated when the environment is
            created
             | 
|  | InitTxnCount | 
            The number of transaction objects allocated when the environment is
            created
             | 
|  | IntermediateDirMode | 
            The intermediate directory permissions. 
             | 
|  | LockConflictMatrix | 
            The current lock conflicts array.
             | 
|  | Lockdown | 
            If true, lock shared Berkeley DB environment files and memory-mapped
            databases into memory.
             | 
|  | LockPartitions | 
            The number of lock table partitions used in the Berkeley DB
            environment.
             | 
|  | LockTableSize | 
            The size of the lock table in the Berkeley DB environment.
             | 
|  | LockTimeout | 
            A value, in microseconds, representing lock timeouts.
             | 
|  | LogAutoRemove | 
            If true, Berkeley DB will automatically remove log files that are no
            longer needed.
             | 
|  | LogBufferSize | 
            The size of the in-memory log buffer, in bytes
             | 
|  | LogDir | 
            The path of a directory to be used as the location of logging files.
            Log files created by the Log Manager subsystem will be created in
            this directory. 
             | 
|  | LogFileMode | 
            The absolute file mode for created log files. This property is only
            useful for the rare Berkeley DB application that does not control
            its umask value.
             | 
|  | LogForceSync | 
            If true, Berkeley DB will flush log writes to the backing disk
            before returning from the write system call, rather than flushing
            log writes explicitly in a separate system call, as necessary.
             | 
|  | LogInMemory | 
            If true, transaction logs are maintained in memory rather than on
            disk. This means that transactions exhibit the ACI (atomicity,
            consistency, and isolation) properties, but not D (durability).
             | 
|  | LogNoBuffer | 
            If true, system buffering is turned off for Berkeley DB log files to
            avoid double caching. 
             | 
|  | LogRegionSize | 
            The size of the underlying logging area of the Berkeley DB
            environment, in bytes.
             | 
|  | LogZeroOnCreate | 
            If true, all pages of a log file are zeroed when that log file is
            created.
             | 
|  | MaxCacheSize | 
            The maximum cache size
             | 
|  | MaxLockers | 
            The maximum number of locking entities supported by the Berkeley DB
            environment.
             | 
|  | MaxLocks | 
            The maximum number of locks supported by the Berkeley DB
            environment.
             | 
|  | MaxLogFileSize | 
            The maximum size of a single file in the log, in bytes. Because
            LSN Offsets are unsigned four-byte
            values, the size may not be larger than the maximum unsigned
            four-byte value.
             | 
|  | MaxMutexes | 
            The total number of mutexes allocated
             | 
|  | MaxObjects | 
            The maximum number of locked objects
             | 
|  | MaxOpenFiles | 
            The number of file descriptors the library will open concurrently
            when flushing dirty pages from the cache.
             | 
|  | MaxSequentialWrites | 
            The number of sequential write operations scheduled by the library
            when flushing dirty pages from the cache. 
             | 
|  | MaxTransactions | 
            The number of active transactions supported by the environment. This
            value bounds the size of the memory allocated for transactions.
            Child transactions are counted as active until they either commit or
            abort.
             | 
|  | MetadataDir | 
            The path of directory to store the persistent metadata.
             | 
|  | MMapSize | 
            The maximum file size, in bytes, for a file to be mapped into the
            process address space. If no value is specified, it defaults to
            10MB. 
             | 
|  | MutexAlignment | 
            The mutex alignment, in bytes.
             | 
|  | MutexIncrement | 
            The number of additional mutexes allocated.
             | 
|  | NoBuffer | 
            If true, turn off system buffering of Berkeley DB database files to
            avoid double caching. 
             | 
|  | NoLocking | 
            If true, Berkeley DB will grant all requested mutual exclusion
            mutexes and database locks without regard for their actual
            availability. This functionality should never be used for purposes
            other than debugging. 
             | 
|  | NoMMap | 
            If true, Berkeley DB will copy read-only database files into the
            local cache instead of potentially mapping them into process memory.
             | 
|  | NoPanic | 
            If true, Berkeley DB will ignore any panic state in the database
            environment. (Database environments in a panic state normally refuse
            all attempts to call Berkeley DB functions, throwing 
            RunRecoveryException.) This functionality should never
            be used for purposes other than debugging.
             | 
|  | NumTestAndSetSpins | 
            The number of times that test-and-set mutexes should spin without
            blocking. The value defaults to 1 on uniprocessor systems and to 50
            times the number of processors on multiprocessor systems. 
             | 
|  | Overwrite | 
            If true, overwrite files stored in encrypted formats before deleting
            them.
             | 
|  | Private | 
            If true, allocate region memory from the heap instead of from memory
            backed by the filesystem or system shared memory. 
             | 
|  | RegionMemoryLimitBytes | 
            The bytes component of the byte-count limit on the amount of
            memory to be used by shared structures in the main environment
            region. These are the structures other than mutexes and the page
            cache (memory pool).
             | 
|  | RegionMemoryLimitGBytes | 
            The gigabytes component of the byte-count limit on the amount of
            memory to be used by shared structures in the main environment
            region. These are the structures other than mutexes and the page
            cache (memory pool).
             | 
|  | Register | 
            If true, Berkeley DB will have checked to see if recovery needed to
            be performed before opening the database environment.
             | 
|  | RepAckTimeout | 
            The amount of time the replication manager's transport function
            waits to collect enough acknowledgments from replication group
            clients, before giving up and returning a failure indication. The
            default wait time is 1 second.
             | 
|  | RepAutoInit | 
            If true, the replication master will automatically re-initialize
            outdated clients (defaults to true). 
             | 
|  | RepBulkTransfer | 
            If true, the replication master sends groups of records to the
            clients in a single network transfer
             | 
|  | RepCheckpointDelay | 
            The amount of time a master site will delay between completing a
            checkpoint and writing a checkpoint record into the log.
             | 
|  | RepClockskewFast | 
            The value, relative to RepClockskewSlow, of the
            fastest clock in the group of sites.
             | 
|  | RepClockskewSlow | 
            The value of the slowest clock in the group of sites.
             | 
|  | RepConnectionRetry | 
            The amount of time the replication manager will wait before trying
            to re-establish a connection to another site after a communication
            failure. The default wait time is 30 seconds.
             | 
|  | RepDelayClientSync | 
            If true, the client should delay synchronizing to a newly declared
            master (defaults to false). Clients configured in this way will remain
            unsynchronized until the application calls RepSync()()(). 
             | 
|  | RepElectionRetry | 
            Configure the amount of time the replication manager will wait
            before retrying a failed election. The default wait time is 10
            seconds. 
             | 
|  | RepElectionTimeout | 
            The timeout period for an election. The default timeout is 2
            seconds.
             | 
|  | RepFullElectionTimeout | 
            An optional configuration timeout period to wait for full election
            participation the first time the replication group finds a master.
            By default this option is turned off and normal election timeouts
            are used. (See the Elections section in the Berkeley DB Reference
            Guide for more information.) 
             | 
|  | RepHeartbeatMonitor | 
            The amount of time the replication manager, running at a client
            site, waits for some message activity on the connection from the
            master (heartbeats or other messages) before concluding that the
            connection has been lost. When 0 (the default), no monitoring is
            performed.
             | 
|  | RepHeartbeatSend | 
            The frequency at which the replication manager, running at a master
            site, broadcasts a heartbeat message in an otherwise idle system.
            When 0 (the default), no heartbeat messages will be sent. 
             | 
|  | RepInMemory | 
            If true, replication only stores the internal information in-memory
            and cannot keep persistent state across a site crash or reboot. By
            default, it is false and replication creates files in the
            environment home directory to preserve the internal information.
             | 
|  | RepLeaseTimeout | 
            The amount of time a client grants its master lease to a master.
            When using master leases all sites in a replication group must use
            the same lease timeout value. There is no default value. If leases
            are desired, this method must be called prior to calling
            RepStartClient()()() or RepStartMaster()()().
             | 
|  | RepMessageDispatch | 
            Set the message dispatch function. It is responsible for receiving
            messages sent from remote sites using either 
            SendMessage(array<DatabaseEntry>[]()[]) or SendRequest(array<DatabaseEntry>[]()[], UInt32).
            If the message received by this function was sent using 
            SendMessage(array<DatabaseEntry>[]()[]), then no response is required.
            If the message was sent using SendRequest(array<DatabaseEntry>[]()[], UInt32),
            then this function must send a response using 
            SendMessage(array<DatabaseEntry>[]()[]).
             | 
|  | RepMgrAckPolicy | 
            Specify how master and client sites will handle acknowledgment of
            replication messages which are necessary for "permanent" records.
            The current implementation requires all sites in a replication group
            configure the same acknowledgement policy. 
             | 
|  | RepMgrLocalSite | 
            The local site of the replication manager. Returns null if the
            local site has not been configured.
             | 
|  | RepMgrRemoteSites | 
            The status of the sites currently known by the replication manager. 
             | 
|  | RepMgrRunElections | 
            If true, Replication Manager automatically runs elections to
            choose a new master when the old master appears to
            have become disconnected (defaults to true).
             | 
|  | RepNoBlocking | 
            If true, Berkeley DB method calls that would normally block while
            clients are in recovery will return errors immediately (defaults to
            false).
             | 
|  | RepNSites | 
            The total number of sites in the replication group.
             | 
|  | RepPriority | 
            The database environment's priority in replication group elections.
            A special value of 0 indicates that this environment cannot be a
            replication group master. If not configured, then a default value
            of 100 is used.
             | 
|  | RepRetransmissionRequestMax | 
            The maximum number of microseconds a client waits before requesting
            retransmission.
             | 
|  | RepRetransmissionRequestMin | 
            The minimum number of microseconds a client waits before requesting
            retransmission.
             | 
|  | RepStrict2Site | 
            Replication Manager observes the strict "majority" rule in managing
            elections, even in a group with only 2 sites. This means the client
            in a 2-site group will be unable to take over as master if the
            original master fails or becomes disconnected. (See the Elections
            section in the Berkeley DB Reference Guide for more information.)
            Both sites in the replication group should have the same value for
            this parameter.
             | 
|  | RepTransmitLimitBytes | 
            The bytes component of the byte-count limit on the amount of data
            that will be transmitted from a site in response to a single
            message processed by RepProcessMessage(DatabaseEntry, DatabaseEntry, Int32).
             | 
|  | RepTransmitLimitGBytes | 
            The gigabytes component of the byte-count limit on the amount of
            data that will be transmitted from a site in response to a single
            message processed by RepProcessMessage(DatabaseEntry, DatabaseEntry, Int32).
             | 
|  | RepTransport | 
            The delegate used to transmit data using the replication
            application's communication infrastructure.
             | 
|  | RepUseMasterLeases | 
            If true, master leases will be used for this site (defaults to
            false). 
             | 
|  | RunFatalRecovery | 
            If true, catastrophic recovery was run on this environment before
            opening it for normal use.
             | 
|  | RunRecovery | 
            If true, normal recovery was run on this environment before opening
            it for normal use.
             | 
|  | SequentialWritePause | 
            The number of microseconds the thread of control will pause before
            scheduling further write operations.
             | 
|  | SetThreadID | 
            A delegate that returns a unique identifier pair for the current 
            thread of control.
             | 
|  | SetThreadName | 
            A delegate that formats a process ID and thread ID identifier pair. 
             | 
|  | SystemMemory | 
            If true, allocate region memory from system shared memory instead of
            from heap memory or memory backed by the filesystem. 
             | 
|  | TempDir | 
            The path of a directory to be used as the location of temporary
            files.
             | 
|  | ThreadCount | 
            An approximate number of threads in the database environment.
             | 
|  | ThreadIsAlive | 
            A delegate that returns if a thread of control (either a true thread
            or a process) is still running.
             | 
|  | TimeNotGranted | 
            If true, database calls timing out based on lock or transaction
            timeout values will throw LockNotGrantedException
            instead of DeadlockException.
             | 
|  | TxnNoSync | 
            If true, Berkeley DB will not write or synchronously flush the log
            on transaction commit.
             | 
|  | TxnNoWait | 
            If true and a lock is unavailable for any Berkeley DB operation
            performed in the context of a transaction, cause the operation to 
            throw DeadlockException (or
            LockNotGrantedException if configured with
            TimeNotGranted).
             | 
|  | TxnSnapshot | 
            If true, all transactions in the environment will be started as if
            Snapshot was passed to
            BeginTransaction()()(), and all non-transactional cursors
            will be opened as if SnapshotIsolation
            was passed to Cursor()()().
             | 
|  | TxnTimeout | 
            A value, in microseconds, representing transaction timeouts.
             | 
|  | TxnTimestamp | 
            The recovery timestamp
             | 
|  | TxnWriteNoSync | 
            If true, Berkeley DB will write, but will not synchronously flush,
            the log on transaction commit. 
             | 
|  | UseEnvironmentVars | 
            The Berkeley DB process' environment may be permitted to specify
            information to be used when naming files; see Berkeley DB File
            Naming in the Programmer's Reference Guide for more information.
             | 
|  | UseMVCC | 
            If true, all databases in the environment will be opened as if
            UseMVCC was set.
             | 
|  | UsingCDB | 
            If true, locking for the Berkeley DB Concurrent Data Store product
            was initialized.
             | 
|  | UsingLocking | 
            If true, the locking subsystem was initialized.
             | 
|  | UsingLogging | 
            If true, the logging subsystem was initialized.
             | 
|  | UsingMPool | 
            If true, the shared memory buffer pool subsystem was initialized.
             | 
|  | UsingReplication | 
            If true, the replication subsystem was initialized.
             | 
|  | UsingTxns | 
            If true, the transaction subsystem was initialized.
             | 
|  | Verbosity | 
            Specific additional informational and debugging messages in the
            Berkeley DB message output.
             | 
|  | YieldCPU | 
            If true, Berkeley DB will yield the processor immediately after each
            page or mutex acquisition.
             | 





