> Thanks for responding . We have 16 worker thread configured in our system.
> We tried to take further  new version but due to several issues , we had
to
> retract . Also it is worth noting that  when we try to slow down enqueue
> operation , issue does not occur or occurs very late.
> Further we can see the free memory of the system gets decreased and does
> not recover fully whenever copy operation is performed. I would try to
> experiment with parameter  Entries_HWMark, as you suggested and post
> you results.

What issues caused problems with the new version (and was that the 2.4 next
branch or one of the 2.3 stable tags?). I'm not certain, but I think there
have been some refcounting fixes in newer code that could affect this issue.

Thanks for continuing to investigate.

Frank

> -----Original Message-----
> From: Malahal Naineni [mailto:mala...@us.ibm.com]
> Sent: Tuesday, April 12, 2016 10:58 PM
> To: Kumar, DeepakX X <deepakx.x.ku...@intel.com>
> Cc: nfs-ganesha-devel@lists.sourceforge.net
> Subject: Re: [Nfs-ganesha-devel] out of memory issue in nfsv 2.3 package
> 
> Kumar, DeepakX X [deepakx.x.ku...@intel.com] wrote:
> >    Hi ,
> >    I am getting out of memory issue in nfsv4 protocol in nfs ganesha
verstio
> >    2.3. IN nfsv3 protocol we did not observe such issue at that
particular
> >    amount of upload. We are suspecting that packet consumption speed is
> >    slower than data reception rate. For that we analyzed nfs queue size
from
> >    which worker thread picks up packets and process. We could see that
> there
> >    is lag in data enqueue and dequeue rate.
> >    Also we observed that when we put delay in read from socket then this
> >    issue does not occur. We are using local and sdfs mount points.In
local
> >    mount points this issue does not occur which indicates the disk write
> >    speed is primarily causing this issue.
> >    But we could not observe any threshold value inf nfsv4 at which oom
> issue
> >    will occur, as compared to nfsv3.
> >    Further oom_score does not go down even after copy is complete in
both
> >    cases of local mount and sdfs mount and int both of nfsv4 and v3
> >    protocols.
> >    Implemeted several solution suggested like inceasing the kernel
priority
> >    of reclaiming cache inode and dentries. But it could not afffect the
> >    issue.
> >
> >    Any suggestion would be highly appreciated.
> 
> Deepak, there is one memory leak fix in DRC area but I don't think you are
> hitting it. The latest V2.3-stable (V2.3.1) should have the fix. If this
is not a
> leak, you need to figure out where the memory is going in ganesha. There
> are few ganesha parameters that limit the amount of memory but
> Entries_HWMark is probably the most critical one. How many worker threads
> you have?
> 
> Regards, Malahal.
> 
> 
>
----------------------------------------------------------------------------
--
> Find and fix application performance issues faster with Applications
Manager
> Applications Manager provides deep performance insights into multiple
tiers
> of your business applications. It resolves application problems quickly
and
> reduces your MTTR. Get your free trial!
> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
> _______________________________________________
> Nfs-ganesha-devel mailing list
> Nfs-ganesha-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/nfs-ganesha-devel


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


------------------------------------------------------------------------------
Find and fix application performance issues faster with Applications Manager
Applications Manager provides deep performance insights into multiple tiers of
your business applications. It resolves application problems quickly and
reduces your MTTR. Get your free trial!
https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
_______________________________________________
Nfs-ganesha-devel mailing list
Nfs-ganesha-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nfs-ganesha-devel

Reply via email to