Sounds like GFS2 operating normally. Do you have any metrics on for the performance of the SAN during these events?
Quoting Durga Prasad Malyala <dp.maly...@gmail.com>:
Hello all, I am seeing consistent delays in writing to disk (my System redhat 7.2 using GFS2 file system cluster) May 4 10:03:34 mail1 postfix/lmtp[11662]: E4EB75048C19: to=<x...@xyz.com>, relay=mail.xyz.com[private/dovecot-lmtp], delay=50, delays=0.02/0/0/50, dsn=2.0.0, status=sent (250 2.0.0 <x...@xyz.com> IIt4Ejji61o3LgAAuUaIWw Saved) during major bursts of receiving mailq delays goes upto 600+ also. GFS2 writing is OK. Not as great as XFS but OK. Disk bottleneck is ruled out as it is a 3PAR SAN with 16 Gbps FC. ocassionally we get "timed out while sending end of data -- message may be sent more than once)" message also and Message goes to deferred queue. Thanks DP
