I think, setBatch is your OOME protection as since it limits the total amount of KeyValues processed in a single call to StoreScanner.next.
Best regards, Vladimir Rodionov Principal Platform Engineer Carrier IQ, www.carrieriq.com e-mail: [email protected] ________________________________________ From: Ted Yu [[email protected]] Sent: Monday, November 04, 2013 1:26 PM To: [email protected] Subject: Re: setCaching and setBatch bq. is there an OOME protections which lowers the caching in case ther server is stressed in memory? I am not aware of such mechanism. On Mon, Nov 4, 2013 at 9:55 AM, Asaf Mesika <[email protected]> wrote: > On this note: > If I hammer a region server with scans that has let's say 100 rows caching > - is there an OOME protections which lowers the caching in case ther server > is stressed in memory? Or will it fail the region server with OOME? > > On Monday, November 4, 2013, Anoop John wrote: > > > Have u tested this? AFAIK it happens the way u like. > > > > -Anoop- > > > > On Mon, Nov 4, 2013 at 10:49 PM, John <[email protected] > <javascript:;>> > > wrote: > > > > > Hi, > > > > > > If I have a question about the setCaching function. As I know the > caching > > > value influence how many rows will be cached in the memory of the > region > > > server. So for example I have 10 rows with 20k columns and I set a > > scanner > > > with the caching option 5 and the batch option 1k. What will hapen If I > > > call the next() function? > > > > > > As far as I know, the region server will cache 5 rows with 1k columns > > each > > > in the memory. If thats right, is there a way to cache the batches > > instead > > > of the rows? In this example I would like to cache 5 batches from row > one > > > instead of 5 rows with each 1k columns. > > > > > > kind regards > > > > > > Confidentiality Notice: The information contained in this message, including any attachments hereto, may be confidential and is intended to be read only by the individual or entity to whom this message is addressed. If the reader of this message is not the intended recipient or an agent or designee of the intended recipient, please note that any review, use, disclosure or distribution of this message or its attachments, in any form, is strictly prohibited. If you have received this message in error, please immediately notify the sender and/or [email protected] and delete or destroy any copy of this message and its attachments.
