1.6

l If creating a very large number of small records (hundreds of thousands of 2-3 page
individual records, for instance), a smaller number of instances with a large number
of speed packs would be better. As for hardware, then the number of cores becomes
critical, whereas RAM and hard drive are secondary. Performance Packs, as well as
the MySQL instance being separate, would be helpful if your most powerful
machine starts struggling.
l Mix and match. For example, one instance prioritized for large jobs and the rest for
smaller, quicker jobs. Or the contrary. Or, whatever you want, really.
l
RAM Configuration: By default, each instance of the Merge Engine and Weaver Engine
is set to use 640MB of RAM. This means that regardless of speed units, if not enough
memory is available, output speed might not be as expected. Assuming that the machine
itself is not running any other software, the rule of thumb is the following: The total number
of used memory in the machine should be pretty much the maximum available (around
95%).
For each engine, it's necessary to modify the .ini file that controls its JAVA arguments.
Edit as follows:
l For the Merge Engine: see C:\Program Files\Objectif Lune\OL
Connect\MergeEngine\Mergeengine.ini
l For the Weaver Engine: see C:\Program Files\Objectif Lune\OL
Connect\weaverengine\Weaverengine.ini
l The parameters are -Xms640m for the minimum RAM size, -Xmx640m for the
maximum RAM size. Explaining Java arguments is beyond the scope of this
document. Please read references here, here and here for more details (fair
warning: these can get pretty technical!).
l
Template and data mapping optimization: Some functionality offered by the
DataMapper and Designer modules are very useful, and sometimes downright awesome,
but can cause the generation of records and of contents items to slow down due to their
nature. Here are some of them:
l
Preprocessor and Postprocessor scripts: manipulating data using a script may
cause delays before and after the data mapping action has actually taken place,
especially file conversion and data enrichment from other sources.
l
Loading external and network resources: In Designer, using images, javascript
or css resources located on a slow network or on a slow internet connection will
obviously lead to a loss of speed. While we do our best for caching, a document
with 100,000 records which queries a page that takes 1 second to return a different
image each time will, naturally, slow output generation down by up to 27 hours.
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