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From Mike Carey <dtab...@gmail.com>
Subject Re: Change in hyracks[master]: This change includes: 1. avoid calling ByteBuffer.get() and ...
Date Sun, 09 Aug 2015 21:54:34 GMT
Ah.  3x.  😃
On Aug 9, 2015 2:53 PM, "Yingyi Bu" <buyingyi@gmail.com> wrote:

> X is the number of pages in the buffer cache.
> 2X or 3X refer to the hash table size.
>
> Best,
> Yingyi
>
> On Sun, Aug 9, 2015 at 2:51 PM, Mike Carey <dtabass@gmail.com> wrote:
>
>> Can someone give a high level hint about what the 2 or 3x is x'ing?
>> On Aug 9, 2015 11:38 AM, "Yingyi Bu (Code Review)" <
>> do-not-reply@asterix-gerrit.ics.uci.edu> wrote:
>>
>>> Yingyi Bu has posted comments on this change.
>>>
>>> Change subject: This change includes: 1. avoid calling ByteBuffer.get()
>>> and ByteBuffer.put() for bloom filter set/get operations. ByteBuffer will
>>> check boundaries of the index for get/put. It's a very frequent operation.
>>> 2. let the hash table size in BufferCache be 3X of
>>> ......................................................................
>>>
>>>
>>> Patch Set 1:
>>>
>>> I don't have a strong opinion for the 3X thing.  You guys decide...
>>>
>>> --
>>> To view, visit https://asterix-gerrit.ics.uci.edu/345
>>> To unsubscribe, visit https://asterix-gerrit.ics.uci.edu/settings
>>>
>>> Gerrit-MessageType: comment
>>> Gerrit-Change-Id: Ifd47c410338ce557a494ab3605660bad1899e786
>>> Gerrit-PatchSet: 1
>>> Gerrit-Project: hyracks
>>> Gerrit-Branch: master
>>> Gerrit-Owner: Yingyi Bu <buyingyi@gmail.com>
>>> Gerrit-Reviewer: Ian Maxon <imaxon@apache.org>
>>> Gerrit-Reviewer: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
>>> Gerrit-Reviewer: Yingyi Bu <buyingyi@gmail.com>
>>> Gerrit-Reviewer: Young-Seok Kim <kisskys@gmail.com>
>>> Gerrit-HasComments: No
>>>
>>
>

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