[Gluster-devel] Huge memory consumption with quota-marker

Vijay Bellur vbellur at redhat.com
Wed Jul 1 17:46:07 UTC 2015

On Wednesday 01 July 2015 08:41 AM, Vijaikumar M wrote:
> Hi,
> The new marker xlator uses syncop framework to update quota-size in the
> background, it uses one synctask per write FOP.
> If there are 100 parallel writes with all different inodes but on the
> same directory '/dir', there will be ~100 txn waiting in queue to
> acquire a lock on on its parent i.e '/dir'.
> Each of this txn uses a syntack and each synctask allocates stack size
> of 2M (default size), so total 0f 200M usage. This usage can increase
> depending on the load.
> I am think of of using the stacksize for synctask to 256k, will this mem
> be sufficient as we perform very limited operations within a synctask in
> marker updation?

Seems like a good idea to me. Do we need a 256k stacksize or can we live 
with something even smaller?


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