Olá sou novo no ubuntu
Estava insatisfeito com a fluidez do sistema principalmente do FF 3.0.6 ...
Depois de "googlar" um pouco procedi da seguinte forma
1- Abri a consola
2. Executar #sudo cat /proc/sys/vm/swappiness
Apareceu o valor 60
3-Alterei o valor para 10 Executando #sudo sysctl -w vm.swappiness=10
(notei logo diferenças)
4-Alterei então o valor para 0 #sudo sysctl -w vm.swappiness=0
Aqui deixei de reconhecer o meu ubuntu 8.10 e ficou super fluido inclusive o FF
Este processo não é definitivo para fixa-lo procedi assim:
1-Editei o ficheiro etc/sysctl.conf #sudo gedit /etc/sysctl.conf
2-Acrescentei a linha vm.swappiness=0 (se já estiver lá a linha é só alterar o valor 0 para o que entenderem)
O meu ficou assim:
#
# /etc/sysctl.conf - Configuration file for setting system variables
# See /etc/sysctl.d/ for additional system variables.
# See sysctl.conf (5) for information.
#
#kernel.domainname = example.com
# Uncomment the following to stop low-level messages on console
#kernel.printk = 4 4 1 7
vm.swappiness=0
##############################################################3
# Functions previously found in netbase
#
# Uncomment the next two lines to enable Spoof protection (reverse-path filter)
# Turn on Source Address Verification in all interfaces to
# prevent some spoofing attacks
#net.ipv4.conf.default.rp_filter=1
#net.ipv4.conf.all.rp_filter=1
# Uncomment the next line to enable TCP/IP SYN cookies
# This disables TCP Window Scaling (
http://lkml.org/lkml/2008/2/5/167),
# and is not recommended.
#net.ipv4.tcp_syncookies=1
# Uncomment the next line to enable packet forwarding for IPv4
#net.ipv4.ip_forward=1
# Uncomment the next line to enable packet forwarding for IPv6
#net.ipv6.conf.all.forwarding=1
###################################################################
# Additional settings - these settings can improve the network
# security of the host and prevent against some network attacks
# including spoofing attacks and man in the middle attacks through
# redirection. Some network environments, however, require that these
# settings are disabled so review and enable them as needed.
#
# Ignore ICMP broadcasts
#net.ipv4.icmp_echo_ignore_broadcasts = 1
#
# Ignore bogus ICMP errors
#net.ipv4.icmp_ignore_bogus_error_responses = 1
#
# Do not accept ICMP redirects (prevent MITM attacks)
#net.ipv4.conf.all.accept_redirects = 0
#net.ipv6.conf.all.accept_redirects = 0
# _or_
# Accept ICMP redirects only for gateways listed in our default
# gateway list (enabled by default)
# net.ipv4.conf.all.secure_redirects = 1
#
# Do not send ICMP redirects (we are not a router)
#net.ipv4.conf.all.send_redirects = 0
#
# Do not accept IP source route packets (we are not a router)
#net.ipv4.conf.all.accept_source_route = 0
#net.ipv6.conf.all.accept_source_route = 0
#
# Log Martian Packets
#net.ipv4.conf.all.log_martians = 1
#
# The contents of /proc/<pid>/maps and smaps files are only visible to
# readers that are allowed to ptrace() the process
# sys.kernel.maps_protect = 1
LI PELA NET QUE É DISCUTÍVEL ESTE PROCEDIMENTO
Contudo devido ao excelente resultado na minha máquina resolvi deixar aqui o testemunho...
Comigo 50 estrelas. E é facilmente reversível.
Agora sim o ubuntu 8.10 é indispensável.
Atenção que eu tenho 2GB de ram com 80GB disK SATA!
Pude reduzir a utilização do swap sem que a minha memória ram ultrapasse os 20-25% de ocupação
Espero ter ajudado...
Abraço