Table: Processing efficiency issues describes processing efficiency issues.
Table: Processing efficiency issues
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Issue
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Description
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Bandwidth throttling and Quality of Service (QOS)
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Bandwidth throttling can be implemented using Quality of Service (QOS) with network switches and routers. QOS should be implemented on TCP/IP port 20481.
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System may run out of memory during intensive input/output processing
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A chronic “nearly out of memory” condition may exist during periods of intensive input/output processing.
To determine the state of the system
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Start the Windows Task Manager.
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Select the Performance tab.
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Look at the Physical Memory (K) control group.
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Verify the amount of available memory to see if the amount drops to 4000 or less (that is, 4 MB) and tends to stay there.
In this state, the system is unresponsive to user input and should be corrected.
For more information about this issue, go to the following URL:
http://seer.entsupport.symantec.com/docs/277876.htm |
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File system input/output deadlocks may occur when continuously backing up large database files
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An input/output deadlock can occur for the following reasons:
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CPS is used to continuously back up large databases.
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The input/output activity on these database files is high.
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The host server has fewer than 4 logical CPUs (that is, 4 physical CPUs without hyperthreading, or 2 CPUs with hyperthreading).
For more information about this issue, go to the following URL:
http://seer.entsupport.symantec.com/docs/277871.htm |
Table: Miscellaneous issues describes miscellaneous issues.
Table: Miscellaneous issues
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Issue
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Description
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Utility partitions
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CPS does not recognize utility partitions.
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Disabling CPS SNMP support
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If the Windows SNMP service is installed on the computer when CPS was installed, CPS’s SNMP support is automatically installed.
For more information how to turn off SNMP support in CPS, go to the following URL:
http://seer.entsupport.symantec.com/docs/277856.htm |
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Multiple pairs are configured to run between the same two computers
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CPS throttles the data transmission for all pairs at the least-restrictive rate. For example, if a backup job is configured to run between two nodes with the bandwidth limited to 20% of a T1 line and another job is configured to run between the same two computers with bandwidth limited to 50% of a T1 line, the throughput of both jobs will be combined and run at a rate of 50% of the T1 line. That is, each job will not run at the 50% rate, but rather both jobs combined.
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The free space on a CPS database volume is exhausted
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If the free space of a CPS database volume is exhausted, the Sybase Adaptive Server Anywhere 9 server may assert and refuse all new connections until the CPS services on that computer are restarted.
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CPS database backup and restore
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Database backup and restore capabilities are based on Volume Shadow Copy Service (VSS) Writer Technology. The following utilities can be used in lieu of using Backup Exec with VSS capabilities for configuration database backups, or if the user wants to perform manual backups and verification.
Use cpsDBBackup to create a validated backup image of the CMS or CPA database.
Use cpsDBValidate to validate and repair the CMS or CPA database. Only corrupt indexes can be repaired. Restore is a manual procedure.
For more information about the CPS database maintenance utilities, go to the following URL:
http://seer.entsupport.symantec.com/docs/277860.htm |
General issues