Performance - OPC UA - High CPU Usage|OPC UA Standard|Forum|OPC Foundation

Hi ,

We are facing performance issue for our application. we have subscribed around 200 tags and write the data from our server to OPC UA expert(client). when we run the performance profiling  for 5 mintues and check the CPU usage, Most of the CPU usage is from the stack code. Here is the reference 

ClearChangeMasks Method  (Stack Code)  – Consuming 36.59% (cpu  usage)

OnMonitoredNodeChange                       – Consuming 36.53% (cpu usage)

QueueValue                                           – Consuming 36.49% (cpu usage)

However, we have a scenario to write around 2000+ tags from server to Client and vice versa, so at that time the CPU usage will be high. 

Here is our Config File 

<MaxSessionCount>100</MaxSessionCount>
<MinSessionTimeout>10000</MinSessionTimeout>
<MaxSessionTimeout>3600000</MaxSessionTimeout>
<MaxBrowseContinuationPoints>10</MaxBrowseContinuationPoints>
<MaxQueryContinuationPoints>10</MaxQueryContinuationPoints>
<MaxHistoryContinuationPoints>100</MaxHistoryContinuationPoints>
<MaxRequestAge>600000</MaxRequestAge>
<MinPublishingInterval>100</MinPublishingInterval>
<MaxPublishingInterval>3600000</MaxPublishingInterval>
<PublishingResolution>50</PublishingResolution>
<MaxSubscriptionLifetime>3600000</MaxSubscriptionLifetime>
<MaxMessageQueueSize>10</MaxMessageQueueSize>
<MaxNotificationQueueSize>100</MaxNotificationQueueSize>
<MaxNotificationsPerPublish>1000</MaxNotificationsPerPublish>
<MinMetadataSamplingInterval>1000</MinMetadataSamplingInterval>
<AvailableSamplingRates>
<SamplingRateGroup>
<Start>5</Start>
<Increment>5</Increment>
<Count>20</Count>
</SamplingRateGroup>
<SamplingRateGroup>
<Start>100</Start>
<Increment>100</Increment>
<Count>4</Count>
</SamplingRateGroup>
<SamplingRateGroup>
<Start>500</Start>
<Increment>250</Increment>
<Count>2</Count>
</SamplingRateGroup>
<SamplingRateGroup>
<Start>1000</Start>
<Increment>500</Increment>
<Count>20</Count>
</SamplingRateGroup>
</AvailableSamplingRates>
<MaxRegistrationInterval>30000</MaxRegistrationInterval>
<MaxSubscriptionCount>200</MaxSubscriptionCount>

Could you please us or give us a solution/suggestion on  how can we reduce the cpu usage for the below methods.

Please help us at the earliest 

Regards,

Vinod Pydi