Re: [HPDD-discuss] MDS dentry slabinfo

well, generally MDS (since 2.0) shouldn’t be using dentry structure much. thanks, Alex On Dec 4, 2013, at 5:01 PM, Daire Byrne <daire(a)dneg.com&gt; wrote: > Ah yes... I was doing that for testing something else and forgot to > unmount. Does that explain the large jump? > > ----- Original Message ----- >> are you running with MDS + client on the same node? >> >> thanks, Alex >> >> On Dec 4, 2013, at 4:25 PM, Daire Byrne <daire(a)dneg.com&gt; wrote: >> >>> Hi, >>> >>> I have been playing around with setting vfs_cache_pressure=0 on our >>> v2.4.1 >>> MDS and noticed that the dentry usage as reported from slabtop looks very >>> odd. It seems to remain pretty much the same for long periods of time and >>> then jumps up suddenly. I have attached a graph of >>> ldiskfs_inode_cache,dentry and buffer_head. >>> >>> https://db.tt/DSxKl5gm >>> >>> Is the dentry usage tracked in some other slab? The server ran out of >>> memory not long after the dentry count jumped up. What I'm interesting in >>> doing is track slab usage and toggle vfs_cache_pressure to avoid running >>> out of memory whilst maximising the inode/dentry cache. >>> >>> Daire<mds-slab.png>_______________________________________________ >>> HPDD-discuss mailing list >>> HPDD-discuss(a)lists.01.org >>> https://lists.01.org/mailman/listinfo/hpdd-discuss >> >> >> -------------------------------------------------------------------- >> Closed Joint Stock Company Intel A/O >> Registered legal address: Krylatsky Hills Business Park, >> 17 Krylatskaya Str., Bldg 4, Moscow 121614, >> Russian Federation >> >> This e-mail and any attachments may contain confidential material for >> the sole use of the intended recipient(s). Any review or distribution >> by others is strictly prohibited. If you are not the intended >> recipient, please contact the sender and delete all copies. >> >> -------------------------------------------------------------------- Closed Joint Stock Company Intel A/O Registered legal address: Krylatsky Hills Business Park, 17 Krylatskaya Str., Bldg 4, Moscow 121614, Russian Federation This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies.