Red Hat NETWORK PROXY SERVER 4.1.0 - Guida di Installazione Scaricare il pdf (Pagina 18)

■ If the value of any kernel parameter is different from the recommended value,

then complete the following steps:

1. Using any text editor, create or edit the

/etc/sysctl.conf

file, and add or edit

lines similar to the following:

fs.aio-max-nr = 1048576

fs.file-max = 6815744

kernel.shmall = 2097152

kernel.shmmax = 536870912

kernel.shmmni = 4096

kernel.sem = 250 32000 100 128

net.ipv4.ip_local_port_range = 9000 65500

net.core.rmem_default = 262144

net.core.rmem_max = 4194304

net.core.wmem_default = 262144

net.core.wmem_max = 1048576

By specifying the values in the

/etc/sysctl.conf

file, they persist when you

restart the system. However, on SUSE Linux Enterprise Server systems, enter

the following command to ensure that the system reads the

/etc/sysctl.conf

file when it restarts:

# /sbin/chkconfig boot.sysctl on

2. Enter the following command to change the current values of the kernel

parameters:

# /sbin/sysctl -p

Review the output from this command to verify that the values are correct. If

the values are incorrect, edit the /etc/sysctl.conf file, then enter this command

again.

3. Enter the command

/sbin/sysctl -a

to confirm that the values are set

correctly.

4. On SUSE systems only, enter the following command to cause the system to

read the

/etc/sysctl.conf

file when it restarts:

file-max # /sbin/sysctl -a | grep file-max

ip_local_port_

range

# /sbin/sysctl -a | grep ip_local_port_range

rmem_default # /sbin/sysctl -a | grep rmem_default

rmem_max # /sbin/sysctl -a | grep rmem_max

wmem_default # /sbin/sysctl -a | grep wmem_default

wmem_max # /sbin/sysctl -a | grep wmem_max

Note: Include lines only for the kernel parameter values to change.

For the semaphore parameters (

kernel.sem

), you must specify all four

values. However, if any of the current values are larger than the

minimum value, then specify the larger value.

Parameter Command

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Red Hat NETWORK PROXY SERVER 4.1.0 - Guida di Installazione Pagina 18

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