moshker
Cadet
- Joined
- Mar 13, 2012
- Messages
- 8
Help sought: I'm seeking tips to help me troubleshoot this problem. Alternatively advice on how to back out (change config to something stable).
Symptoms: High reads (28-34 MB/sec) to datastore containing zfs volumes. High read latency on datastores containing zfs volumes (50-100 ms).
Configuration: Optiplex 760 (3 Ghz cpu, 6 GB RAM, 2 TB Sata disk) running ESXi 4.1u2. Freenas 8.2 running as vm - 1.5 GB RAM, 1 vcpu, and 3 zfs volumes - each lives as a vmdk on the 2 TB sata disk. ZFS volumes aren't being accessed and no file share protocols are enabled (cifs, nfs, etc).
History: Originally was ESXi 4.1u1. Originally was running an 8.0-RELEASE-i386.iso. Was stable and though there was some latency it wasn't nearly as unusable as it is now. Upgraded to 8.03-RELEASE-p1-x64. My recollection is that I installed from iso, intending to overwrite the previous 32 bit install, but somehow it kept the settings. At some point after this the i/o problems became obvious and the Freenas volumes became unusable.
Steps taken: Removed vmdk holding 8.03 configuration. Installed 8.2 from iso. Auto-imported the volumes. Problems re-occurred. Restarts. Turned of Smart. Checked for scrub schedule, default. Checked system processes. Python is at 0:02 time with 6 threads, state looks like it is alternating between uwait and piperd. Vmtoolsd is the third service listed but has a time of 0:00 and a state of select. Originally had 1 GB of RAM. Upped it to 1.5 GB without any apparent affect on performance. Searched forums at Freenas.org and vmware.com without finding anything that seemed to speak to this issue directly.
Any help is appreciated.
Kindest regards,
Oscar
Symptoms: High reads (28-34 MB/sec) to datastore containing zfs volumes. High read latency on datastores containing zfs volumes (50-100 ms).
Configuration: Optiplex 760 (3 Ghz cpu, 6 GB RAM, 2 TB Sata disk) running ESXi 4.1u2. Freenas 8.2 running as vm - 1.5 GB RAM, 1 vcpu, and 3 zfs volumes - each lives as a vmdk on the 2 TB sata disk. ZFS volumes aren't being accessed and no file share protocols are enabled (cifs, nfs, etc).
History: Originally was ESXi 4.1u1. Originally was running an 8.0-RELEASE-i386.iso. Was stable and though there was some latency it wasn't nearly as unusable as it is now. Upgraded to 8.03-RELEASE-p1-x64. My recollection is that I installed from iso, intending to overwrite the previous 32 bit install, but somehow it kept the settings. At some point after this the i/o problems became obvious and the Freenas volumes became unusable.
Steps taken: Removed vmdk holding 8.03 configuration. Installed 8.2 from iso. Auto-imported the volumes. Problems re-occurred. Restarts. Turned of Smart. Checked for scrub schedule, default. Checked system processes. Python is at 0:02 time with 6 threads, state looks like it is alternating between uwait and piperd. Vmtoolsd is the third service listed but has a time of 0:00 and a state of select. Originally had 1 GB of RAM. Upped it to 1.5 GB without any apparent affect on performance. Searched forums at Freenas.org and vmware.com without finding anything that seemed to speak to this issue directly.
Any help is appreciated.
Kindest regards,
Oscar