Gluster users - Jul 2013 - prob nfs server not responding randomly if write data

Hallo,

I have a problem with glusterfs-nfs.
NFS mounts with glusterd on localhost.

If write files, then hang nfs.
(different times and sizes)
After 2 min. write errmsg: nfs: server localhost not responding, still trying


I have read many webpages, but found no solution.
Following  tries failed: performance.cache-size, wsize

I suspected a memory-leak, so i run vmstat into background.
see below

any idea is welcome.

Regards Heiko

- version
  glusterfs 3.3.1 built on Jul  5 2013 17:25:10
  debian_version: 7.0


- test18 ram=2g dd

209715200 bytes (210 MB) copied, 2.74499 s, 76.4 MB/s
 0  0      0 515260  10340 767088    0    0     0 20893 10702 6946  1  1 93  5
2013-07-06 16:57:13 VSZ RSS: 195084 76380
2013-07-06 16:57:15 start write 500M
2013-07-06 16:57:15 du: 358401 df: 1%
 0  2      0  92576   3260 775436    0    0     0  3262 7139 5245  1  2 81 17
2013-07-06 16:57:23 VSZ RSS: 678412 341956
 0  3      0  91428   3260 775800    0    0    36     0  855  106  0  0 66 34
2013-07-06 16:57:33 VSZ RSS: 678412 341956
 0  4      0  90396   3268 775468    0    0     0    14  866  118  0  0 74 26
2013-07-06 16:57:44 VSZ RSS: 678412 341956
 0  3      0 121180   3276 770576    0    0     0  3458 3066 1547  1  0 64 35
2013-07-06 16:57:54 VSZ RSS: 592396 299264
 0  3      0 119816   3276 770576    0    0     0     0  841   86  0  0 62 37
...
2013-07-06 17:00:04 VSZ RSS: 880140 460264
 0  2      0 169732   3308 687464    0    0     0  1166 1367  406  0  0 87 13
2013-07-06 17:00:15 VSZ RSS: 868876 454344
 0  2      0 128080   3316 687696    0    0     0  1258 1871  785  0  0 81 19
2013-07-06 17:00:25 VSZ RSS: 938508 498276
[  467.972627] nfs: server localhost not responding, still trying

the complete doc available on
http://www2.fh-lausitz.de/launic/comp/net/glusterfs/tmp/130705.prob.glusterfs.nfs_server_not_resp.call.txt