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Posted to user@ignite.apache.org by Andrey Kornev <an...@hotmail.com> on 2017/11/05 00:55:01 UTC
Data region's pages fill factor
Hello,
I'm a bit confused about the meaning of PagesFillFactor MBean attribute. According to the documentation (as well as a tooltip in the JMX MBean Browser -- here's a snapshot https://snag.gy/57FVw8.jpg), the attribute indicates "the percentage of space that is still free and can be filled in". I'm consistently getting 0.99... Does it mean that my pages are 99% empty?
Re: Data region's pages fill factor
Posted by Ilya Lantukh <il...@gridgain.com>.
Hi Andrey,
Looks like the tooltip is wrong and should be fixed.
Your interpretation of FreeListImpl.fillFactor() is correct - the former
value is used space, the latter one is total allocated. So, your pages are
99% full.
On Sun, Nov 5, 2017 at 4:08 AM, Andrey Kornev <an...@hotmail.com>
wrote:
> Oops! Hit "Send" a bit too soon.
>
> On the other hand, FreeListImpl.fillFactor() (used by the MBean under the
> hood to compute the PageFillFactor value) returns a tuple where loadSize
> == 409825856 and totalSize == 413892608. If my interpretation of these
> values is correct, shouldn't PageFillFactor be described as "the percentage
> of used space", or in other words, how full the pages are?
>
> Or, is it something else?
>
> Thanks
> Andrey
> ------------------------------
> *From:* Andrey Kornev <an...@hotmail.com>
> *Sent:* Saturday, November 4, 2017 5:55 PM
> *To:* user@ignite.apache.org
> *Subject:* Data region's pages fill factor
>
> Hello,
>
> I'm a bit confused about the meaning of PagesFillFactor MBean attribute.
> According to the documentation (as well as a tooltip in the JMX MBean
> Browser -- here's a snapshot https://snag.gy/57FVw8.jpg), the attribute
> indicates "the percentage of space that is still free and can be filled
> in". I'm consistently getting 0.99... Does it mean that my pages are 99%
> empty?
>
>
>
--
Best regards,
Ilya
Re: Data region's pages fill factor
Posted by Andrey Kornev <an...@hotmail.com>.
Oops! Hit "Send" a bit too soon.
On the other hand, FreeListImpl.fillFactor() (used by the MBean under the hood to compute the PageFillFactor value) returns a tuple where loadSize == 409825856 and totalSize == 413892608. If my interpretation of these values is correct, shouldn't PageFillFactor be described as "the percentage of used space", or in other words, how full the pages are?
Or, is it something else?
Thanks
Andrey
________________________________
From: Andrey Kornev <an...@hotmail.com>
Sent: Saturday, November 4, 2017 5:55 PM
To: user@ignite.apache.org
Subject: Data region's pages fill factor
Hello,
I'm a bit confused about the meaning of PagesFillFactor MBean attribute. According to the documentation (as well as a tooltip in the JMX MBean Browser -- here's a snapshot https://snag.gy/57FVw8.jpg), the attribute indicates "the percentage of space that is still free and can be filled in". I'm consistently getting 0.99... Does it mean that my pages are 99% empty?