Service manual

Tuning System Settings
Chapter 5 Tuning the Operating System 103
File Descriptors
DirectoryServerusesfiledescriptorswhen handlingconcurrentclient connections.
Having a low maximum number of file descriptors available in the system or
available to a process can thus limit the number of concurrent connections.
Recommendations concerning the number of file descriptors therefore relate to the
number of concurrent connections Directory Server may be able to handle on the
system.
On Solaris systems, the number of file descriptors available is configured through
the
rlim_fd_max parameter, as described in the output of
/usr/sbin/directoryserver idsktune (packaged version) or idsktune (no
packages). Refer to the operating system documentation for further instructionson
modifying the number of available file descriptors.
After modifying the maximum number of available file descriptors on the system,
refer to Table 9-2 on page 152 forinformation on configuring Directory Server to
use the available file descriptors.
(HP-UX) Large File Support
On some HP-UX systems, large files are not supported by default. Refer to the
HP-UX product documentation for instructionson enabling large file support on
the file systems where youintend to install Directory Server. Instructions are also
provided in the output of the
idsktune utility.
(HP-UX) Threads Pending Timeout
OnsomeHP-UX systems,the maximum number of threads pending timeoutsmay
be inappropriately set as indicated by the
idsktune utility. Refer to the HP-UX
documentation for instructions on increasing the maximum number of threads
pending timeouts. Instructions are also providedin the output of the
idsktune
utility.
(HP-UX) Threads Per Process
Onsome HP-UX systems,the maximum numberofthreads per processmaybetoo
low as indicated by the
idsktune utility. Refer to the HP-UX documentation for
instructions on increasing the maximum number of threads per process.
Instructions are also provided in the output of the
idsktune utility.