Ubuntu – Possible to use ureadahead to cache frequently used programs

bootcacheureadahead

EDIT I kinda answered my question with the help of this. The only question remaining is how to make the changes permanently stay in the pack-file and not be lost on reprofile. I'll leave the question open in case someone knows of a way (I'll accept that as an answer then). /EDIT

I use my PC in a very similar fashion after boot: I'm using evince, chromium-browser, gmpc and gpodder most of the time. Now I want to cache those programs (at the expense of boot time if needed) using ureadahead.

Now I looked at the contents of the ureadahead pack like this sudo ureadahead --dump|grep chromium and found only icons, .dekstop files and gconf key to be cached*.

So I was wondering whether there's a way to make ureadahead cache the binaries and libraries of my most commonly used programs as well and make them open in a snap after boot.

*As far as I understood ureadahead doesn't really cache but rather keep a list of files and sorts them by inodes thus optimizing the access pattern but well…

Best Answer

Maybe

Hmm - maybe the preload is the application what you are looking at

:~$ apt-cache show preload

Description: adaptive readahead daemon
 preload monitors applications that users run, and by analyzing this
 data, predicts what applications users might run, and fetches those
 binaries and their dependencies into memory for faster startup times.
 .
 Note that installing preload will not make your system boot faster
 and that preload is a daemon that runs with root priviledges.

Homepage: http://sourceforge.net/projects/preload

Few Links

http://www.cyberciti.biz/tips/speed-up-your-linux-system.html

http://www.howtoforge.com/speed-up-your-system-with-preload-on-ubuntu-9.04

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Ubuntu – Ureadahead – how to clear it’s cache

You probably mean ureadahead.

If so, remove any pack files in the /var/lib/ureadahead directory.

Ubuntu – Ubuntu tweak and Mozilla (firefox and thunderbird) cache

As I tested Ubuntu Tweak 0.8.6 in Ubuntu 13.10. It seems that for both, late releases of Mozilla Firefox and Thunderbird moved their cache folders to ~/.cache. Profiles configuration kept in same place ~/.mozilla/firefox/profiles.ini and ~/.thunderbird/profiles.ini.

Firefox: ~/.mozilla/firefox/ → ~/.cache/mozilla/firefox/
Thunderbird: ~/.thunderbird/ → ~/.cache/thunderbird/

Quick patch:

sudo nano /usr/share/pyshared/ubuntutweak/janitor/mozilla_plugin.py

Add/Change all lines I include cache_path in them (3 new lines, 2 modified app_path → cache_path, keep app_path of the profiles.ini):

import os
import logging

from ubuntutweak.janitor import JanitorCachePlugin
from ubuntutweak.settings.configsettings import RawConfigSetting

log = logging.getLogger('MozillaCachePlugin')

class MozillaCachePlugin(JanitorCachePlugin):
    __category__ = 'application'

    targets = ['Cache',
               'OfflineCache']
    app_path = ''
    cache_path = ''

    @classmethod
    def get_path(cls):
        profiles_path = os.path.expanduser('%s/profiles.ini' % cls.app_path)
        if os.path.exists(profiles_path):
            config = RawConfigSetting(profiles_path)
            try:
                profile_id = config.get_value('General', 'StartWithLastProfile')
                for section in config.sections():
                    if section.startswith('Profile'):
                        relative_id = config.get_value(section, 'IsRelative')
                        if relative_id == profile_id:
                            return os.path.expanduser('%s/%s' % (cls.cache_path, config.get_value(section, 'Path')))
            except Exception, e:
                log.error(e)
                path = config.get_value('Profile0', 'Path')
                if path:
                    return os.path.expanduser('%s/%s' % (cls.cache_path, path))
        return cls.root_path


class FirefoxCachePlugin(MozillaCachePlugin):
    __title__ = _('Firefox Cache')

    app_path = '~/.mozilla/firefox'
    cache_path = '~/.cache/mozilla/firefox'

class ThunderbirdCachePlugin(MozillaCachePlugin):
    __title__ = _('Thunderbird Cache')

    cache_path = '~/.cache/thunderbird'
    app_path = '~/.thunderbird'

I filled an upstream bug report for this, See Cache path of Mozilla Firefox and Thunderbird changed to ~/.cache #24

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Best Answer

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Ubuntu – Ureadahead – how to clear it’s cache

Ubuntu – Ubuntu tweak and Mozilla (firefox and thunderbird) cache

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