Hi @ all,
we host serveral virtual machines on a 3 node hyper-v 2012 R2 cluster attached to a PS6100XV.
One of the virtual machines is a Windows Server 2008 (64bit edition) that hosts one MSSQL 2008 R2 instance with serveral databases inside. TEMP-DB, LOGS and MDBs are distributed to several Volumes inside the vm.
Our costumer is reporting that queries against the biggest Database which has 30GB size are really slow.
We checked several vm ressources but can't find anything why queries are slow.
VM details:
8 vCPUs
20 GB of RAM
Volumes have free space
EQL performance with crystal disk inside the VM:
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CrystalDiskMark 4.0.3 x64 (C) 2007-2015 hiyohiyo
Crystal Dew World : http://crystalmark.info/
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* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes
Sequential Read (Q= 32,T= 1) : 359.317 MB/s
Sequential Write (Q= 32,T= 1) : 426.067 MB/s
Random Read 4KiB (Q= 32,T= 1) : 23.129 MB/s [ 5646.7 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 28.683 MB/s [ 7002.7 IOPS]
Sequential Read (T= 1) : 128.796 MB/s
Sequential Write (T= 1) : 195.052 MB/s
Random Read 4KiB (Q= 1,T= 1) : 0.684 MB/s [ 167.0 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 5.001 MB/s [ 1220.9 IOPS]
Test : 1024 MiB [L: 84.1% (42.1/50.0 GiB)] (x3)
Date : 2015/06/10 10:08:48
OS : Windows Server 2008 Server Standard (full installation) SP2 [6.0 Build 6002] (x64)
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Since we can't compare if these performance results with other systems I wanted to ask if this results are common or if we have a problem with our eql or setup.
Are these results indicating a problem or do we have problems inside the database (indexes, structure)?
Thanks for help,
André