Memory Admission Control Issue for Storage IO Control
Article ID: 317957
Updated On:
Products
VMware vSphere ESXi
Issue/Introduction
Symptoms:
- vSphere 6.7 and Above, ESXi hosts might experience a Memory Admission Control issue for Storage IO Control.
- This condition leads to the following log spew in the /var/log/vmkernel.log file
MemSchedAdmit: 470: Admission failure in path: sioc/storageRM.13011002/uw.13011002
MemSchedAdmit: 477: uw.13011002 (68246725) extraMin/extraFromParent: 256/256, sioc (840) childEmin/eMinLimit: 14059/14080
and can cause ESXi Host unresponsiveness
Environment
VMware vSphere ESXi 6.7
Resolution
This is fixed in ESXi 6.7 update 3.
Workaround:
2. Stop the service
3. Start the service
Workaround:
Users can workaround the issue by restarting the SIOC service using the following commands on the affected ESXi Hosts:
1. Check the status of storageRM and sdrsInjector
/etc/init.d/storageRM status
/etc/init.d/sdrsInjector status
/etc/init.d/sdrsInjector status
2. Stop the service
/etc/init.d/storageRM stop
/etc/init.d/sdrsInjector stop
/etc/init.d/sdrsInjector stop
3. Start the service
/etc/init.d/storageRM start
/etc/init.d/sdrsInjector start
/etc/init.d/sdrsInjector start
If the issue persists even after the SIOC service is restarted, users can temporarily disable SIOC by turning off the feature from VMware Virtual Center
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