title: Error in performance test PostgreSQL and GlusterFS
body: <p>I'm doing performance test with pgbench to evaluate the impacts of using Glusterfs with Postgresql. I've created a gluster replicated volume with 3 bricks/servers:</p>
  
  <pre><code>Volume Name: gv0
  Type: Replicate
  Volume ID: a7e617ec-c564-4a01-aec9-807e87fcccb3
  Status: Started
  Snapshot Count: 0
  Number of Bricks: 1 x 3 = 3
  Transport-type: tcp
  Bricks:
  Brick1: 10.112.76.37:/export/sdb1/brick
  Brick2: 10.112.76.38:/export/sdb1/brick
  Brick3: 10.112.76.39:/export/sdb1/brick
  Options Reconfigured:
  transport.address-family: inet
  nfs.disable: on
  performance.client-io-threads: off
  </code></pre>
  
  <p>After that I've configured postgres to use the the volume gv0. Everything works fine under low stress. However, when the load is increased, the following error occurs:</p>
  
  <pre><code>client 14 aborted in state 9: ERROR:  unexpected data beyond EOF in block 0 of relation base/16384/16503
  HINT:  This has been seen to occur with buggy kernels; consider updating your system.
  client 7 aborted in state 9: ERROR:  unexpected data beyond EOF in block 0 of relation base/16384/16503
  HINT:  This has been seen to occur with buggy kernels; consider updating your system.
  client 5 aborted in state 9: ERROR:  unexpected data beyond EOF in block 0 of relation base/16384/16503
  HINT:  This has been seen to occur with buggy kernels; consider updating your system.
  client 6 aborted in state 9: ERROR:  unexpected data beyond EOF in block 0 of relation base/16384/16503
  HINT:  This has been seen to occur with buggy kernels; consider updating your system.
  client 8 aborted in state 9: ERROR:  unexpected data beyond EOF in block 0 of relation base/16384/16503
  HINT:  This has been seen to occur with buggy kernels; consider updating your system.
  client 0 aborted in state 9: ERROR:  unexpected data beyond EOF in block 0 of relation base/16384/16503
  HINT:  This has been seen to occur with buggy kernels; consider updating your system.
  client 11 aborted in state 9: ERROR:  unexpected data beyond EOF in block 0 of relation base/16384/16503
  HINT:  This has been seen to occur with buggy kernels; consider updating your system.
  </code></pre>
  
  <p>Any idea of what's causing this? </p>