[Gluster-users] glusterfsd process spinning

[Franco Broi]

Hi

I've been suffering from continual problems with my gluster filesystem
slowing down due to what I thought was congestion on a single brick
being caused by a problem with the underlying filesystem running slow
but I've just noticed that the glusterfsd process for that particular
brick is running at 100%+, even when the filesystem is almost idle.

I've done a couple of straces of the brick and another on the same
server, does the high number of futex errors give any clues as to what
might be wrong?

% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
45.58    0.027554           0    191665     20772 futex
28.26    0.017084           0    137133           readv
26.04    0.015743           0     66259           epoll_wait
  0.13    0.000077           3        23           writev
  0.00    0.000000           0         1           epoll_ctl
------ ----------- ----------- --------- --------- ----------------
100.00    0.060458                395081     20772 total

% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
99.25    0.334020         133      2516           epoll_wait
  0.40    0.001347           0      4090        26 futex
  0.35    0.001192           0      5064           readv
  0.00    0.000000           0        20           writev
------ ----------- ----------- --------- --------- ----------------
100.00    0.336559                 11690        26 total



Cheers,