IBM E16RMLL-I Implementation Guide - Page 534
General parameters
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TCPBUFFSIZE The TCPBUFFSIZE option specifies the size of the internal TCP communication buffer that is used to transfer data between the client node and the server. A large buffer can improve communication performance, but requires more memory. The default setting of TCPBUFFSIZE to 32 on client and server is the recommended value. TCPNODELAY The TCPNODELAY option, when set to Yes, allows data packets less than the MTU size to be sent out immediately. We recommend staying with the default setting of YES. 15.3.4 General parameters These parameters can affect system performance and can be manually tuned according to client requirements. Note: The following parameters must be set in the server options file and require a restart of the Tivoli Storage Manager server to take effect. EXPINTERVAL The Tivoli Storage Manager server runs automatic inventory expiration to remove unneeded client backup and archive file copies from the server. The EXPINTERVAL option specifies the interval in hours between automatic expiries. Backup and archive copy groups specify the criteria that make copies of files eligible for deletion from data storage. However, even when a file becomes eligible for deletion, the file is only marked for deletion in the server database. It is not physically deleted from the database and storage pools until expiration processing occurs. If expiration processing does not occur periodically, storage pool space is not reclaimed from expired client files, and the Tivoli Storage Manager server requires increased disk storage space. Expiration processing is very CPU intensive. If possible, it should be run when other Tivoli Storage Manager processes are not occurring. To enable this, either schedule expiration once per day, or use the setopt expinterval 0 command and manually start the process with the expire inventory command at the server. 504 IBM Tivoli Storage Manager Implementation Guide
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