======================
Optimizations stories
======================

Start
=====
A zope and plone 25 bulk will be our testLand

Test procedure:

    - Make some changes
    - Run and store the following ab2 test::

        /usr/sbin/ab2 -n 100 http://hostt/> a_filename

Errors levels
=============
- debug off
- error level -> error
- Setted in the buildout.cfg ::

    [project]
    log-level = ERROR
    debug = off
    session-timeout-minutes = 90



ZODB
====
Try to change the cache size from 5000 to 10000 & see
::

    <zodb_db main>
        # Main database
        cache-size 10000
    # FileStorage database
        <filestorage>
          path /home/kiorky/projects/zope/minitage-0.4/zope/test-perfs/var/filestorage/Data.fs
        </filestorage>
        mount-point /
    </zodb_db>

result : 3,47, little improvment nothing wonderfull

Http cache
==========

Metadata files
-----------------
Adding .metadata for images and static content::

    title=$(basename "$filep" "$ext")
    echo "Generating metadata for $filep"
    echo "[default]"       >  "$filep".metadata
    echo "title=$title"    >> "$filep".metadata
    echo "cache=HTTPCache" >> "$filep".metadata

Http headers control
-----------------------
Test on "parts/plone/MimetypesRegistry/skins/mimetypes_icons/quicktime.png" which has no metadata by default
Without::

    (minitage-documenter) (minitage-0.4)~>wget -S    http://localhost:8080/z/quicktime.png
    --12:24:46--  http://localhost:8080/z/quicktime.png
               => `quicktime.png'
    Résolution de localhost... 127.0.0.1
    Connexion vers localhost|127.0.0.1|:8080...connecté.
    requête HTTP transmise, en attente de la réponse...
      HTTP/1.0 200 OK
      Server: Zope/(Zope 2.9.8-final, python 2.4.4, linux2) ZServer/1.1 Plone/2.5.5
      Date: Tue, 24 Jun 2008 10:24:47 GMT
      Last-Modified: Wed, 05 Dec 2007 03:33:42 GMT
      Content-Length: 693
      Content-Type: image/png
      Connection: Keep-Alive
    Longueur: 693 [image/png]

    100%[===============================================================================================================================================================================================>] 693           --.--K/s

    12:24:47 (100.67 MB/s) - « quicktime.png » sauvegardé [693/693]

With::

    --12:29:44--  http://localhost:8080/z/quicktime.png
               => `quicktime.png.14'
    Résolution de localhost... 127.0.0.1
    Connexion vers localhost|127.0.0.1|:8080...connecté.
    requête HTTP transmise, en attente de la réponse...
      HTTP/1.0 200 OK
      Server: Zope/(Zope 2.9.8-final, python 2.4.4, linux2) ZServer/1.1 Plone/2.5.5
      Date: Tue, 24 Jun 2008 10:29:44 GMT
      Content-Length: 693
      Expires: Tue, 24 Jun 2008 11:29:44 GMT
      Last-Modified: Tue, 24 Jun 2008 10:29:44 GMT
      Connection: Keep-Alive
      Cache-Control: max-age=3600
      Content-Type: image/png
    Longueur: 693 [image/png]

    100%[===============================================================================================================================================================================================>] 693           --.--K/s

    12:29:44 (86.02 MB/s) - « quicktime.png.14 » sauvegardé [693/693]



Python optimize mode
=====================
We must set the PYTHONOPTIMIZE envrionment variable to 1.


RAMCACHE
========
- This is a very good manner to cache python scripts.
- Add a ramcache to the site and associate content types with it.
- We can add also templates and etc and tweak the cache key with the http request variables.

Cachefu
========

- Set up various plne settings for caching policies. Its a great product.
- things important to know is that cachefu can run in a standalone mode or run behind a classical http cache proxy like squid.
- It monkeypatches several products to wrap the methods against its caching ones.
- We can add easily rules throught the plone back office too.
- As an example, locally, Cache fu in zope only mode == x30



References
===========
- http://plone.org/events/conferences/2007-naples/speakers/sessions/high-performance-plone-caching
- http://performance.survol.fr/

.. vim:set ft=rest :