Setting File Descriptors; Tuning Tcp Parameters - Red Hat DIRECTORY SERVER 7.1 Installation Manual

Chapter 2. Computer System Requirements
112785-43:
112970-07:
112951-09:
113277-24:
113579-06:
112908-14:
113073-14:
Table 2-5. Solaris 9 Patch List
2.3.4.4. Tuning the System
Basic Solaris tuning guidelines are available from several books, including Sun Performance and
Tuning: Java and the Internet (ISBN 0-13-095249-4). Advanced tuning information is available
in the Solaris Tunable Parameters Reference Manual (816-7137), which can be obtained from
http://docs.sun.com/db/doc/816-7137.

2.3.4.5. Setting File Descriptors

The system-wide maximum file descriptor table size setting limits the number of concurrent connec-
tions that can be established to Directory Server. The governing parameter, rlim_fd_max, is set in
the file. By default, if this parameter is not present, the maximum is 1024. It can be
/etc/system
raised to 4096 by adding a line such as
the system.
Caution
This parameter should not be raised above 4096 without first consulting your Sun Solaris support
representative since it may affect the stability of the system.
You should also set the soft limit for file descriptors:
ulimit -n in csh limit desc 1024
Use the utility (see Section 2.3.1
dsktune
for file descriptors.

2.3.4.6. Tuning TCP Parameters

By default, the TCP/IP implementation in a Solaris kernel is not correctly tuned for Internet or Intranet
services. The following /dev/tcp tuning parameters should be inspected and, if necessary, changed to
fit the network topology of the installation environment.
The tcp_time_wait_interval in Solaris 9 specifies the number of milliseconds that a TCP
connection is held in the kernel's table after it has been closed. If its value is above 30000 (30 seconds)
and the directory is being used in a LAN, MAN, or under a single network administration, it should
be reduced by adding a line to the
X11 6.6.1: Xsun Patch
SunOS 5.9: patch libresolv
SunOS 5.9: patchadd and patchrm Patch
SunOS 5.9: st, sd, and ssd Patch
SunOS 5.9: ypserv/ypxfrd Patch
SunOS 5.9: krb5 shared object Patch
SunOS 5.9: ufs and fsck Patch
set rlim_fd_max=4096
dsktune
/etc/init.d/inetinit
to
/etc/system
Utility) to learn about the hard and soft limits
file similar to the following:
19
and rebooting