andre da palma andrefsp

## solr-performance.rst

      
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                andrefsp
                / solr-performance.rst
            
            
              Created
              March 13, 2013 14:12
            
          
    A general rule of thumb we work with is:

Use the Oracle JVM, not OpenJDK. OpenJDK has a lot of issues with large amounts of memory
You'll want twice as much memory dedicated to the JVM as the index size is on disk. i.e. if your committed/optimized index is 20GB in size, you'll want 40GB of RAM + a little spare.

Use a good garbage collector, e.g.::
JAVA_OPTS="${JAVA_OPTS} -XX:+UseConcMarkSweepGC -XX:+UseParNewGC"


Logging helps a LOT when shit is not working as expected::
JAVA_OPTS="${JAVA_OPTS} -Xloggc:/var/log/tomcat6/log_GarbageCollection -XX:+PrintGCDetails -XX:+PrintGCTimeStamps"JAVA_OPTS="${JAVA_OPTS} -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/var/log/tomcat6/oom_log"


REMEMBER, CACHES NEED RAM. ALLOCATED MORE RAM TO THE JVM AS IS REQUIRED BASED ON YOUR CACHES.

  
## gist:5115772
"""
Simple example on how to inject a custom user parameters onto a formset
and its forms.

curry():  https://github.com/django/django/blob/1.4.3/django/utils/functional.py#L9

Another answer on:

http://stackoverflow.com/questions/622982/django-passing-custom-form-parameters-to-formset
"""
	"""
	Simple example on how to inject a custom user parameters onto a formset
	and its forms.

	curry(): https://github.com/django/django/blob/1.4.3/django/utils/functional.py#L9

	Another answer on:

	http://stackoverflow.com/questions/622982/django-passing-custom-form-parameters-to-formset
	"""