VM warning: Performance bug
tom.rodriguez at oracle.com
Thu Dec 15 12:38:39 PST 2011
On Dec 15, 2011, at 12:02 PM, Kelly O'Hair wrote:
> Anyone seen this message before:
> OpenJDK 64-Bit Server VM warning: Performance bug: SystemDictionary lookup_count=22915 lookup_length=24212 average=1.056600 load=0.528246
> Maybe from jdk7u2?
I think it's fairly benign. It just means that the hashtable for the SystemDictionary isn't performing quite as well as we'd like. It's a little hard to evaluate without knowing how many entries are in the table. I would assume that it just has a lot of classes loaded. It's a somewhat useless message but it's debug only so I guess I wouldn't worry about it.
More information about the hotspot-dev