show read
Use the show read command to view statistics about the Read process.
Basic Command
The basic show read command shows an overview of the process, such as the data source, whether the process is running or stopped, and other basic information.
Detailed statistics
To view detailed statistics for the Read process, use the show read command with the [detail] option. This option shows detailed statistics that can help you assess the performance of the process, decide whether tuning parameters need to be adjusted, and detect problems or bottlenecks.
Detailed statistics for Oracle Read
| Host |
The name of the local machine (source system). |
| Source |
The name of the source Oracle instance. |
| Status |
The status of the Read process (running or stopped). |
| Operations forwarded |
The number of operations that Read sent to the Export queue. |
| Since |
The time that Read started. |
| Total |
The number of messages in the capture queue that have yet to be read-released. This number corresponds to the 'Number of messages' returned from running qstatus. |
| Backlog |
The number of messages that are waiting in the capture queue to be processed by Read. |
| Last operation forwarded |
Identifying information about the most recent operation that Read sent to the export queue, or the last operation it sent if Read is inactive. An operation can be data relating to a DML or DDL operation or an internal SharePlex operation. |
| Read state |
The state of the process, in relation to the replication work it performs: It can be one of the following:
- IDLE: Read is waiting to collect and process the next batch of records from the capture queue. If Read is idle too long, it could mean that Capture is running behind or that it is idle because there is no new data in the capture queue. If that is not the case, and you want to reduce the latency of the Read process, you can adjust the SP_ORD_DELAY_RECORDS parameter to have Read collect and process records faster.
- PASS1: Read is in the first phase of processing the data and packaging it for routing.
- PASS2: Read is in its second phase of processing.
The Read State field is useful if Read appears to be taking too long to process an operation. |
| Activation ID |
The internal identifying number of the configuration activation, which identifies the associated processes and queues. |
| Operations forwarded |
The number of transactional and internal SharePlex operations sent by Read to the export queue since it started. |
| Transactions forwarded |
The number of committed transactions sent by Read to the export queue since it started. Comparing this value with the value for the operations forwarded indicates whether the transactions tend to be small or large. You can use that information to determine why Read appears to be falling behind and why the queues are not emptying (large transactions without a COMMIT). |
| Full rollbacks |
The number of rolled back transactions processed by Read. |
| Full rollback operations skipped |
The number of operations that Read does not forward to the export queue because the transaction was rolled back. |
| Cursor cache hit count |
The number of times Read used a cached cursor. |
| Cursor cache miss count |
The number of times Read could not use a cached cursor. |
| Number of open cursors |
The number of open cursors reserved by Read to access Oracle if necessary. |
| Number of active batches |
The number of transactions currently active that are being processed as a batch transaction. If enabled, Read will combine batch operations so that they can be posted more quickly. |
| Batch message total |
The number of operations that the Read process combines into batch operations. |
Usage
| Supported sources: |
Oracle |
| Supported targets: |
All |
| Authorization level: |
Viewer (3) |
| Issued for: |
source system |
| Related commands: |
show capture, show export, show import, show post |
Syntax
| show read |
[detail] [for datasource] |
[ on host |
on host:portnumber |
on login/password@host |
on login/password@host:portnumber ] |
Syntax description
| show read |
Shows the state of the Read process and a summary of the operations processed. |
| detail |
This option displays detailed statistics for the Read process.
Example:
sp_ctrl(sysA)> show read detail |
| for datasource |
This option shows Read statistics for a specific datasource.
datasource is expressed as o.SID where SID is an ORACLE_SID.
Examples:
sp_ctrl(sysA)> show read for o.oraA |
Remote options
These options enable you to issue the command on a remote machine and to script commands that include a login name, password, port number, or combination of those items.
| on host |
Execute the command on a remote system (one other than the one where the current sp_ctrl session is running). You are prompted for login credentials for the remote system. If used, must be the last component of the command syntax.
Example: sp_ctrl(sysB)>status on SysA |
| on host:portnumber |
Execute the command on a remote system when a remote login and port number must be provided. If used, must be the last component of the command syntax.
Example: sp_ctrl(sysB)>status on SysA:8304 |
| on login/password@host |
Execute the command on a remote system when a remote login, password, and host name must be provided. If used, must be the last component of the command syntax.
Example: sp_ctrl(sysB)>status on john/spot5489@SysA |
| on login/password@host:portnumber |
Execute the command on a remote system when a remote login, password, host name, and port number must be provided. If used, must be the last component of the command syntax.
Example: sp_ctrl(sysB)>status on john/spot5489@SysA:8304 |
show sql
Use the show sql command to view the SQL statement being written by the Post process to post data to the target database. If the post queue is empty, or if Post is not processing a statement, the show sql command shows the most recent SQL statement processed.
Use this command when you think replication is taking too long, or when Post stops on an error. Knowing which SQL statement is at fault can help you determine what is wrong and whether or not further action is required.
The following is an example of the show sql display:
sp_ctrl (tustin:8852)> show sql
Last SQL statement of queue tustin and instance o.ora920-0.ora920 on tustin
insert into “KWONG”.”KCWTAB2” (“C1”,”C2”) values (:V001,:V002)
Issue this command for the target system.
Usage
| Supported sources: |
Oracle |
| Supported targets: |
All |
| Authorization level: |
Viewer (3) |
| Issued for: |
target system |
| Related commands: |
none |
Syntax
| show sql |
[queue queuename]
[for datasource-datadest]
[thread=n]
[session=n] |
[ on host |
on host:portnumber |
on login/password@host |
on login/password@host:portnumber ] |
Syntax description
| show sql |
Without options, shows all SQL statements. |
| queue queuename |
Use this option to show the SQL statement for a specific named queue.
- queue is a required part of the syntax.
- queuename is the name of the queue. If you are unsure what the queue name is, issue the qstatus command.
Queue names are case-sensitive on all platforms.
Example:
sp_ctrl(sysA)> show sql queue q1 |
| for datasource-datadest |
Use this option to show the SQL for a specific replication stream when you are replicating to or from more than one Oracle instance.
- for is a required part of the syntax.
- datasource is expressed as o.SID, where SID is the ORACLE_SID of the source Oracle instance.
- datadest is expressed as o.SID, where SID is the ORACLE_SID of the target Oracle instance.
Example:
sp_ctrl(sysA)> show sql for o.oraA-o.oraB |
| thread=n |
Use this option to show the SQL for a post processing thread.
- thread= is a required part of the syntax.
- n is a thread number displayed with the show post threads command.
Leave no spaces between the components. This option can appear in any order with other options.
Example:
sp_ctrl(sysB)> show sql thread=1234 |
| session=n |
Use this option to show the SQL for a user session.
• session= is a required part of the syntax.
• n is a session number displayed with the show post threads command. Leave no space between the components. This option can appear in any order with other options.
Example:
sp_ctrl(sysB)> show sql session=1234 |
Remote options
These options enable you to issue the command on a remote machine and to script commands that include a login name, password, port number, or combination of those items.
| on host |
Execute the command on a remote system (one other than the one where the current sp_ctrl session is running). You are prompted for login credentials for the remote system. If used, must be the last component of the command syntax.
Example: sp_ctrl(sysB)>status on SysA |
| on host:portnumber |
Execute the command on a remote system when a remote login and port number must be provided. If used, must be the last component of the command syntax.
Example: sp_ctrl(sysB)>status on SysA:8304 |
| on login/password@host |
Execute the command on a remote system when a remote login, password, and host name must be provided. If used, must be the last component of the command syntax.
Example: sp_ctrl(sysB)>status on john/spot5489@SysA |
| on login/password@host:portnumber |
Execute the command on a remote system when a remote login, password, host name, and port number must be provided. If used, must be the last component of the command syntax.
Example: sp_ctrl(sysB)>status on john/spot5489@SysA:8304 |
show statusdb
Use the show statusdb command to view the Status Database. Each machine involved in replication has its own Status Database that contains records of key replication events, including those that did not generate an error message or warning at the user interface. This information can alert you to potential problems and help you resolve existing ones.
The show statusdb display includes the following information:
- Level: whether the entry is there only for information purposes or whether it is the result of an error or warning condition.
- Details: the reason for the event.
When appropriate, the Status Database refers you to the Event Log if there is more information about an entry.
Usage
| Supported sources: |
Oracle |
| Supported targets: |
All |
| Authorization level: |
Viewer (3) |
| Issued for: |
source or target system |
| Related commands: |
status, lstatus |
Syntax
| show statusdb |
detail |
[ on host |
on host:portnumber |
on login/password@host |
on login/password@host:portnumber ] |
Syntax description
| detail |
This option displays a higher level of detail for the Status Database.
Example:
sp_ctrl(sysB)> show statusdb detail |
Remote options
These options enable you to issue the command on a remote machine and to script commands that include a login name, password, port number, or combination of those items.
| on host |
Execute the command on a remote system (one other than the one where the current sp_ctrl session is running). You are prompted for login credentials for the remote system. If used, must be the last component of the command syntax.
Example: sp_ctrl(sysB)>status on SysA |
| on host:portnumber |
Execute the command on a remote system when a remote login and port number must be provided. If used, must be the last component of the command syntax.
Example: sp_ctrl(sysB)>status on SysA:8304 |
| on login/password@host |
Execute the command on a remote system when a remote login, password, and host name must be provided. If used, must be the last component of the command syntax.
Example: sp_ctrl(sysB)>status on john/spot5489@SysA |
| on login/password@host:portnumber |
Execute the command on a remote system when a remote login, password, host name, and port number must be provided. If used, must be the last component of the command syntax.
Example: sp_ctrl(sysB)>status on john/spot5489@SysA:8304 |
show scn
Use the show scn command to view the Oracle SCN of the last transaction that a Post process applied to the target. The command shows all of the last SCNs when using multiple post queues.
NOTE: This command stops all Post processes in order to obtain the SCN information.
sp_ctrl (sysB)> show scn
For resume replication from ora112
On source activate to scn=4550108289
reconcile queue spdl13 for o.ora112-o.ora112 scn 4550108290
reconcile queue spdl14 for o.ora112-o.ora112 scn 4574108174
reconcile queue spdl15 for o.ora112-o.ora112 scn 5374667318
Usage
| Supported sources: |
Oracle |
| Supported targets: |
Oracle |
| Authorization level: |
Viewer (3) |
| Issued for: |
target system |
| Related commands: |
activate config |
Syntax
| show scn |
[ on host |
on host:portnumber |
on login/password@host |
on login/password@host:portnumber ] |
Remote options
These options enable you to issue the command on a remote machine and to script commands that include a login name, password, port number, or combination of those items.
| on host |
Execute the command on a remote system (one other than the one where the current sp_ctrl session is running). You are prompted for login credentials for the remote system. If used, must be the last component of the command syntax.
Example: sp_ctrl(sysB)>status on SysA |
| on host:portnumber |
Execute the command on a remote system when a remote login and port number must be provided. If used, must be the last component of the command syntax.
Example: sp_ctrl(sysB)>status on SysA:8304 |
| on login/password@host |
Execute the command on a remote system when a remote login, password, and host name must be provided. If used, must be the last component of the command syntax.
Example: sp_ctrl(sysB)>status on john/spot5489@SysA |
| on login/password@host:portnumber |
Execute the command on a remote system when a remote login, password, host name, and port number must be provided. If used, must be the last component of the command syntax.
Example: sp_ctrl(sysB)>status on john/spot5489@SysA:8304 |
