Disable logging in Debian testing or Sparkylinux.

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http://linux-sunxi.org/Optimizing_system_performance

Reducing system logging activity

In a default distro install, system logging is often configured fully, suitable for a server or multi-user system. However, on a single-user system the constant writing the many system log files will result in reduced interactive system performance, and reducing logging activity will be beneficial for performance as well as the lifetime of the flash memory.

In a Debian Wheezy installation, the default system logger is rsyslog, and it configuration file is /etc/rsyslog.conf. In the rules section, the following logs are often enabled by default:

auth,authpriv.*                        /var/log/auth.log
*.*;auth,authpriv.none         -/var/log/syslog
cron.*                         /var/log/cron.log
daemon.*                       -/var/log/daemon.log
kern.*                         -/var/log/kern.log
lpr.*                          -/var/log/lpr.log
mail.*                         -/var/log/mail.log
user.*                         -/var/log/user.log

There may also be rules for -/var/log/debug and -/var/log/messages, and |/dev/xconsole.

Note that kernel messages are logged in both kern.log and syslog, in addition to being available from the dmesg command from kernel memory. In a single user system, it is possible to disable most or all of these logs by placing a '#' character at the start of the corresponding lines. Logs can be re-enabled if it is necessary to debug a system problem.