-Re: Introduce GC tuning profiles
Suraj Varma 2012-07-05, 16:13
I would like to second Laxman's proposal. Currently, some of the
"default" hbase configuration is targeted towards newbies so as to
avoid getting basic questions in the mailing list ... which is ok. I
think we at least need something like an hbase-prod.xml that lists
more realistic values for a production like environment - or perhaps
provide value ranges that are appropriate for a production-like
For instance, default zookeeper.session.timeout of 3 minutes is known
to be too long ... so, what is a more realistic one for production ...
and so forth.
The profiles approach is even better if we see a lot of variations
depending on cluster / available heap size / etc.
I don't think anyone should expect blindly using them - but at least
it gives a much better starting point for tuning the cluster for folks
taking this into production.
On Wed, Jul 4, 2012 at 9:55 PM, Laxman <[EMAIL PROTECTED]> wrote:
>> Personally I have not seen many variations - if at all - based on
>> cluster size, apart from the heap settings. What are you proposing
>> should be different for each profile?
> Not necessarily. We may have one profile only if we don't have many
> variations. Few I can see [Xms, Xmx, NewSize, MaxNewSize]
> IMHO, user can take advantage of community recommendations (GC collection
> algorithm - HBase documentation, DirectMemorySize - HDFS-3600).
> Also, if possible we can extend this profiles concept to HBase
> configurations as well.