It would also depends on the caching abilities and that the currently paralelized threads are not sharing a resource. In the end, like with all Computer Science stuff, the answer is "it depends" :)
-- Itamar Syn-Hershko http://code972.com | @synhershko <https://twitter.com/synhershko> Freelance Developer & Consultant Author of RavenDB in Action <http://manning.com/synhershko/> On Fri, Jul 18, 2014 at 11:34 PM, [email protected] < [email protected]> wrote: > Always. > > Elasticsearch makes heavy use of threading. A Java thread must be mapped > to an execution pipeline in the CPU. The more Java threads an application > creates, the more resources the CPU must provide. The "hyperthreading" > feature of Intel CPUs is a core with two execution pipelines instead of > one. So, for thread pooling, it helps to manage Java threading more > efficiently. (In reality, it also depends on the compiler that was used for > building the JVM, if the compiler can not exploit the power of CPU features > like hyperthreading, it is useless for Java) > > Jörg > > > On Fri, Jul 18, 2014 at 9:57 PM, Nikolas Everett <[email protected]> > wrote: > >> Does hyper threading help Elasticsearch/Lucene? I'm looking for an >> answer like: >> Never >> Always >> Depends on workload >> Doesn't hurt >> >> Thanks! >> >> Nik >> >> -- >> You received this message because you are subscribed to the Google Groups >> "elasticsearch" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/elasticsearch/CAPmjWd05Rf6_fJfz8YohXRvJNmREtCx6wGwikYdgHobqJMfKPA%40mail.gmail.com >> <https://groups.google.com/d/msgid/elasticsearch/CAPmjWd05Rf6_fJfz8YohXRvJNmREtCx6wGwikYdgHobqJMfKPA%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elasticsearch/CAKdsXoFX26bXqRbTEK6mQ%2BLLuB1ELkGNSTO5O9cXfUrXc9UBNQ%40mail.gmail.com > <https://groups.google.com/d/msgid/elasticsearch/CAKdsXoFX26bXqRbTEK6mQ%2BLLuB1ELkGNSTO5O9cXfUrXc9UBNQ%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/CAHTr4ZuE0QsaGOcwvUS13%2B_nZfk%2BD6Y%2BeQcnC6%3D-YMo3x8v5Qw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
