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Date: Sun, 05 Sep 2004 19:44:42 +0300
From: Yedidia Klein <yedidia@jct.ac.il>
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Subject: Re: [linux-lvm] Suggested Kernel and LVM version for
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Alasdair G Kergon wrote:

>On Sun, Aug 29, 2004 at 11:37:06AM +0300, Yedidia Klein wrote:
>  
>
>>Sometimes I'm getting the following errors, and get all my LVM 
>>FileSystem Blocked .. (mean I can't access the files on these partitions 
>>and have to reboot for getting access again)
>>    
>>
> 
>  
>
>>   Aug 26 01:00:02 nazir kernel: device-mapper: 
>>                         Unable to allocate hash table space 
>>    
>>
>
>i.e. There wasn't enough memory available to set up the snapshot.
>What sizes:  How big is the LV & snapshot?
>
main partition is 500GB and I've two snapshots, weekly that is 100G and 
daily that is 60G

> 
>What chunk size?  [Try changing.]
>  
>
chunk is 8.00 KB (what is the suggested value ??)

>Is there just one snapshot?
>  
>
as I wrote there are two..

>Check your memory usage.
>  
>
my hardware memory is almost full 860/1000, but the swap isn't that used 
(it's now 3.3/2000) do the device mapper need more real mem ?? does it 
worth to increase the swap ?

tnx,

--Yedidia

>Alasdair
>  
>