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From "Jim Kellerman (POWERSET)" <Jim.Keller...@microsoft.com>
Subject RE: how many rows per GB memory
Date Mon, 27 Oct 2008 15:30:23 GMT
Each memcache will consume approximately
 ((x bytes per key (HStoreKey = row + column + timestamp)) +
  (avg value size))
 * (number of rows)
which is limited to 64MB per memcache.

The heap size required is determined by:
 (number of regions being hosted) * (number of families) * 64MB

---
Jim Kellerman, Powerset (Live Search, Microsoft Corporation)


> -----Original Message-----
> From: news [mailto:news@ger.gmane.org] On Behalf Of Billy Pearson
> Sent: Sunday, October 26, 2008 11:23 PM
> To: hbase-user@hadoop.apache.org
> Subject: how many rows per GB memory
>
> Is there some numbers I can figure on per GB of heap that I can get in to
> a
> regionserver?
>
> say something like this:
> (x bytes avg per rowkey * max rows) / index interval = y GB Heap
>
>
> Billy
>
>
>
>


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