topic Re: Performance issues on virtual machines stored on NFS datastore in VMware Solutions Discussions https://community.netapp.com/t5/VMware-Solutions-Discussions/Performance-issues-on-virtual-machines-stored-on-NFS-datastore/m-p/70518#M6720 <HTML><HEAD></HEAD><BODY><P>Hi Ruben, do you have any SMVI jobs running at the same time?&nbsp; and have you configured the NFS/TCP changes in the advanced configuration mentioned in the vshpere on Netapp TR Doc, especially the TCP/IP heap settings?</P><P></P><P>The other thing to check, is the disk alignment, if the VMDK's are out of alignment the more and more VM's in a datastore the more the problem is prominent...</P><P></P><P>Other than that, check the network settings at the switch, flow control etc can cause a hassle...</P></BODY></HTML> Sat, 02 Oct 2010 17:10:28 GMT kevingolding 2010-10-02T17:10:28Z Performance issues on virtual machines stored on NFS datastore https://community.netapp.com/t5/VMware-Solutions-Discussions/Performance-issues-on-virtual-machines-stored-on-NFS-datastore/m-p/70513#M6718 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>Our configuration :</P><P></P><P>NetApp 2050A</P><P>ESXi 4.0.0,208167 with Virtual Lab Manager</P><P>Swich Gigabit (cisco catOS)</P><P>Static Multimode IP load balancing between filer and switch</P><P>No multimode on the ESX.</P><P>2 NFS datastores stored on SATA aggregates</P><P>1 NFS datastores stored on FC aggregates</P><P></P><P>We have applied all recommendations described in NetApp technical document TR3428.</P><P></P><P></P><P>Our users experienced very low responses using virtual machines hosted on filer NFS datastore. Quite often the vitual machines even freezes for several seconds.</P><P></P><P>The behaviour is the same on both SATA and FC aggregates.</P><P></P><P>For investigation purpose we have built a linux-based NFS server. User experience with the virtual machines stored on the linux server is quite good. There no performance issue here.</P><P>When the virtual machines stored on the filer are freezing, virtual machines stored on linux server operate normally.</P><P></P><P>The filer does not show any CPU, Disks or Network I/O saturations. The ESXi server does not show any resources saturations either.</P><P></P><P>Is there a way to monitor the throughput (Bytes/sec) used by a given virtual machines? or the throughput only between the ESXi and the Filer?</P><P>Could someone help, please?</P><P></P><P>Thank you.</P><P>Ruben.</P></BODY></HTML> Thu, 05 Jun 2025 07:07:37 GMT https://community.netapp.com/t5/VMware-Solutions-Discussions/Performance-issues-on-virtual-machines-stored-on-NFS-datastore/m-p/70513#M6718 tis 2025-06-05T07:07:37Z Re: Performance issues on virtual machines stored on NFS datastore https://community.netapp.com/t5/VMware-Solutions-Discussions/Performance-issues-on-virtual-machines-stored-on-NFS-datastore/m-p/70518#M6720 <HTML><HEAD></HEAD><BODY><P>Hi Ruben, do you have any SMVI jobs running at the same time?&nbsp; and have you configured the NFS/TCP changes in the advanced configuration mentioned in the vshpere on Netapp TR Doc, especially the TCP/IP heap settings?</P><P></P><P>The other thing to check, is the disk alignment, if the VMDK's are out of alignment the more and more VM's in a datastore the more the problem is prominent...</P><P></P><P>Other than that, check the network settings at the switch, flow control etc can cause a hassle...</P></BODY></HTML> Sat, 02 Oct 2010 17:10:28 GMT https://community.netapp.com/t5/VMware-Solutions-Discussions/Performance-issues-on-virtual-machines-stored-on-NFS-datastore/m-p/70518#M6720 kevingolding 2010-10-02T17:10:28Z