VMWare CPU Limit effect on VM computing and disk speed – CPU stolen time

Symptoms:
Customer complaining about slow SQL server and event application timeout.
Hihg CPU usage and slow disk with bad disk time response.
Let’s check the the 4 CPU core:
Hihg CPU usage at night

At first glance, it seemed like a heavily used server.
The lack of server resources caused timeouts for the applications.

I suspect VMWare virtualization cause performance issue:

VMWare Virtualization CPU Stolen time
CPU Stolen time is high

Thanks for the teamwork, we found the settings which caused a poor performance: Continue reading “VMWare CPU Limit effect on VM computing and disk speed – CPU stolen time”

VMware hot cpu hozzáadás SQL szerverhez futás közben

CPU módosítás történt: vCPU10 -ről vCPU 14 -re SQL AO AG enterprise szerveren.

VMware hot cpu added
VMware hot cpu added

A túlterhelt vmware host-on 11:22:36 környékén bekövetkezett egy rövid idejű  fagyás, alátamasztás: The system time has changed to ‎2018‎-‎04‎-‎11T09:22:37.175000000Z from ‎2018‎-‎04‎-‎11T09:22:36.337733900Z.

11:22:47 Windows Server Failover Cluster did not receive a process event signal from SQL Server hosting availability group ‘servername’ within the lease timeout period.
11:22:48 -kor cluster szolgáltatás failed.  Windows Server Failover Cluster did not receive a process event signal from SQL Server hosting availability group ‘servername’ within the lease timeout period.
11:22:57   4 db vcpu hozzáadás

Processor 13 in group 0 exposes the following power management capabilities:Idle state type: ACPI Idle (C) States (1 state(s))
Performance state type: ACPI Performance (P) / Throttle (T) States
Nominal Frequency (MHz): 3396
Maximum performance percentage: 100
Minimum performance percentage: 100
Minimum throttle percentage: 12

 

Majd ezután  Always On Availability Groups state change állapot következik és a bejövő kapcsolatokat sorra eldobálja.
11:25:45-kor  úgy dönt, hogy minden rendben is ismét primary oldal a kiszolgáló, bejönnek a kapcsolatok és elkezd dolgozni a szerver.