Tell commands - D2000 DBManager

MONITOR_TRANS SHOW {ALL/<id>} [<file_path>]

MONITOR_TRANS ON <history_depth_sec>

MONITOR_TRANS OFF

MONITOR_TRANS RESET

The mechanism for monitoring of the transactions.

ON - activates the monitoring. <history_depth_sec> means a time-depth history of closed transactions.
OFF - deactivates the monitoring
RESET - resets the list of transactions (including the opened ones)
SHOW - shows either the list of transactions including the history (ALL) or the particular transaction (<id>) to a console or file <file_path> in CSV format separated by ";"

Columns in the list:
- ID (transaction identifier)
- time, task, traceback (time the last operation within the group of identical ones, task, traceback in the internal code)
- comment, count (the last comment and the number of consecutive identical operations) (the identical operations has the same task and traceback)

Note: After starting DBManager, the monitoring is switched off.

MONITOR_CONNECTS SHOW {ALL/<id>} [<file_path>]

MONITOR_CONNECTS ON <history_depth_sec>

MONITOR_CONNECTS OFF

MONITOR_CONNECTS RESET

Monitoring the connections.

ON - activates the monitoring. <history_depth_sec> represents the time-depth history of closed connections.
OFF - deactivates the monitoring
RESET - resets the list of connections (including the opened ones)
SHOW - shows either the list of connections including the history (ALL), or the particular connection (<id>) to a console or file <file_path> in CSV format separated by ";"

Columns in the list:
- ID (auxiliary identifier of connection)
- logon_time, logon_task, logon_traceback (time of connection, task and traceback in internal code)
- logoff_time, logoff_task, logoff_traceback (time of disconnection, task, and traceback in internal code)
- comment (the last written comment for the given connection, e.g. traceback in ESL code)

Note: After starting DBManager, the monitoring is activated with the time-depth history of closed connections which is 3 hours (10 800 seconds).

The command allows you to close and reopen connections to the database that are not currently in use (there is no transaction in progress or a cursor in use).

Note: This command was implemented to work with temporary tables in PostgreSQL. These are only dropped when the database connection ends, and while they exist, the data in them is not visible outside the database connection that inserted them, so they cannot be accessed by vacuum, and therefore internal transaction IDs (XIDs) can be exhausted if a connection is open for a long time.

The command will cause the execution of the SQL statement DISCARD TEMPORARY in the PostgreSQL database with the specified name/ID on all connections, or on a specific one.

Note: This command was implemented to work with temporary tables in PostgreSQL. These are only dropped when the database connection ends, and while they exist, the data in them is not visible outside the database connection that inserted them, so they cannot be accessed by vacuum, and therefore internal transaction IDs (XIDs) can be exhausted if a connection is open for a long time.

The command may be used for example after a failure or stoppage of the application, which the D2000 GateWay Client process belongs to. It allows transferring the values from the archive of the remote application to the archive of the application. The only requirement of the value transfer is that the values of corresponding objects have been stored in the archive of the remote application.

The first form of the command reads all values transferred by specified remote tags (as well as structured objects).

The second form of the command reads all the values of several objects according to the mask.

The third form reads the values of a part of the structured object. The parameter item specifies a column of the destination structure (see the Destination structure parameter in the configuration of the remote tag) and it must be specified within quotes. When a single row (column) needs to be read, use the following:

• reading row 10 - GETOLDVAL "RemoteTagName[10]" …
• reading the column named Values - GETOLDVAL "RemoteTagName[0]^Values" …

The TELL command must always be executed in the transaction mode - the COMMAND action (within the D2000 System Console process, the command is automatically executed in the transaction mode). After the command is executed, the values that were transferred will be stored in the archive and the D2000 Archive automatically recalculates corresponding statistics.

The NORECALC parameter can be set at the end of the GETOLDVAL. In this case, the statistic calculations will not be executed by the D2000 Archiv process.

Debug Info for remote objects - enables/disables displaying the information about processing the values of objects with specified HOBJ or with the name matching the given mask.

Note: if the gateway client is run in a transparent gateway mode, use the TRGTW command to display debug information.

Starts recording of values read from the GateWay Server. For details see the command description for the D2000 KOM process.

Note: Replaying of recorded values by the D2000 KOM process is possible if the GateWay Client was running in a transparent gateway mode during the recording.

Instantly stops recording of values read from the GateWay Server. For details see the command description for the D2000 KOM process.