sw_db_wisqueue_n

Each sw_db_wisqueue_n (where n is 1 or 2) queue table holds messages intended for the Work Item Server Mbox daemon process:

• The background processes (BG) enqueue messages to the table.
• The Work Item Server Mbox daemon process (WISMBD) dequeues and processes messages from the table, which it then forwards on to the Work Item Server (WIS) processes.

Structure

The sw_db_wisqueue_n table has the following structure:

TABLE sw_db_wisqueue_n (
	rowid		NUMERIC(15)		identity(1,1),
	last_failed	NUMERIC(10)		NULL,
	failure_count	INTEGER			NOT NULL,
	msg_id		uniqueidentifier	NOT NULL,
	msg_hdr		VARCHAR(512)		NULL,
	msg_data	VARCHAR(1024)		NOT NULL
	priority	INTEGER			NOT NULL)

Column

Description

rowid

Identifier of the row in the table for this message.

last_failed

Number of seconds since January 1st, 1970, when this message last failed to be processed.

When this value equals or exceeds the value of the IQL_RETRY_DELAY process attribute, the message is retried.

failure_count

Number of times that this message has failed to be processed.

When this value equals or exceeds the value of the IQL_RETRY_COUNT process attribute, the message is moved to the sw_db_deadqueue.

msg_id

Unique identifier of this message.

msg_hdr

Header data associated with this message.

msg_data

Message data.

priority

Message queue priority. The lower this value is, the higher the message queue priority is.

The default value is 50.

Note 

See "Administering Process Attributes" in TIBCO iProcess Engine Administrator's Guide for more information about the IQL_RETRY_DELAY and IQL_RETRY_COUNT attributes.

Primary Key

No primary key is defined for this table.

Triggers

None.

Indexes

The following clustered index is defined for this table.

Index Name

Indexed Column(s)

idx_sw_db_wisqueue_n1

row_id

Table Activity

Each sw_db_wisqueue_n table contains one row for each enqueued message. Rows are added, updated and deleted in the following situations.

A row is...

When...

added

a BG process enqueues a message to this table.

updated

the WISMBD process dequeues a message from this table but cannot successfully process it (but the message has not exceeded the IQL_RETRY_COUNT value).

deleted

the WISMBD process dequeues a message from this table and either:

  • successfully processes it.

  • cannot successfully process it, and moves it to the sw_db_deadqueue table because it has exceeded the IQL_RETRY_COUNT value.