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CHAPTER 3 Configuring the Operating System
Configuration Guide 35
For Linux
The number of file descriptors per process is limited to 10,000. You can set the
number of file descriptors using
ulimit.
For Sun Solaris
For Sun Solaris, you can set both soft and hard limits for file descriptors. The
soft limit can be increased up to the hard limit by the user, but the hard limit
can be increased only by someone with “root” permissions. The soft limit
determines the number of open file descriptors available to an Adaptive Server
engine. The limit is 10,000.
Although most of the open file descriptors are available for user connections,
a few are used by Adaptive Server engines for opening files and devices.
See the System Administration Guide for additional information on user
connections.
Displaying current soft and hard limits
To display the current soft limit, for C shells, enter:
limit descriptors
For Bourne shells, enter:
ulimit -n
To display the current hard limit for C shells, enter:
limit -h descriptors
For Bourne shells, enter:
ulimit -Hn
Increasing the soft limit
To increase the soft limit for C shells, enter:
limit descriptors n
For Bourne shells, enter: