Hewlett Packard HP-UX

The c-treeACE Server for HP-UX requires a minimum of 2MB RAM. The HP-UX 11 operating system, and above, supports standard c-treeACE files up to 4 GB in size and allows huge files. Earlier versions support 2GB file sizes and requires segmented files to support larger files.

For proper operations of the c-treeACE SQL Server under various loads, we recommend adjusting the following kernel parameters of the HP/UX 11 system, using the sam utility:

• Increase maximum per-process stack memory size (maxssiz) from the default of 8 MB to 128 MB.
• Increase maximum per-process data memory size (maxdsiz) from the default of 64 MB to 256 MB.
• Consider increasing the number of threads per process if connecting a large number of clients. The default for older releases of the OS is relatively low (64 maximum threads per process).
• Either increase the default number of file handles from 60 to 256 by using sam or prior to starting the c-treeACE SQL process issue limit descriptors 256 to increase the number of file descriptors used by that process only.