![]() ![]() Normal day-to-day CMDB processing should not consume more than 20% of AR System server CPU capacity. Private queues allow you to restrict how much CPU is used by CMDB processes. ![]() By default, CMDB processes are executed using fast and list threads. If the Queue is not in a appropriate range, then the client will get a error.īMC CMDB normalization and reconciliation processing are CPU intensive. If a queue is defined by the client but the AR Server does not have that queue or it is a wrong number, then the request will be sent to either Admin, List, or Fast Queues.If no queue is defined by the client, the AR Server routes the request to either Admin, List, or Fast Queues depending on the type of request submitted.When defining an RPC Queue, you must configure the client to send its request on that queue and the AR Server to create the same RPC queue for processing the work.Some things like Reconciliation queue are largely predictable since most reconciliation jobs are started at specific times. Sometimes, you do not have control on some threads like Fast and List threads about the work they will process, as users and their interactions largely determines what work is sent to the threads for processing. You must always consider what a queue will be used for. The syntax for this configuration is: Private-RPC-Socket ![]() In order to configure a new Private Queue for the AR Server, the AR System Administrator can either add, remove, or modify the Private-RPC-Socket parameter in the Centralized Configuration form. Configuring New Private Queues for AR Server The following examples show when the queues and threads are not effective:Įxample 1: It would provide no benefit to have a Queue configured in AR Server, but no clients using it.Įxample 2: It would provide no benefit to have a a single threaded plugin be assigned to its own Private Queue with 10 threads configured.Įxample 3: It would cause a performance issue to have a 4 threaded client configured to a AR Server Queue where only 1 thread is assigned.Įxample 4: It would cause a performance issue to have a client configured to a AR Server Queue, where no AR Server Queue is configured. Use the tables below to better understand both default Queues (ones that you cant change and should always have) and suggested Queues for processes that might be different based on your environment. Making a change in either the AR Server or the Client (and not both) makes any performance issues worse. You must make changes for both the AR Server and the Client for any changes with queues and threads to be effective. Fewer queues with lower thread counts will cause fewer queries to execute at the same time. More queues with higher thread counts cause more parallel operations to execute at the same time. Depending on the goals of the system, queues and threads allows administrators to either limit (throttle) certain operations or allow operations to be executed in parallel. This is a performance tuning exercise that should provide no functional impact on any system. Threads can be added or removed for all queues using Centralized Configuration without a server restart.Ĭonfiguring AR System RPC Queues and Threads is not a requirement for all systems and must not impact daily operations. Private Queues can be added and removed using Centralized Configuration without a server restart. There is no scenario where the number of threads would reduce back to the minimum once the maximum is reached, unless you changed the configuration to be a lower number. If in the last 5 seconds of the first request, 3 more requests came in, they are scheduled to Thread 2, 3, and 4 - as Thread 1 (even though it is next in the round robin scheme) is not available. If Client 1 sends another request before the first one is complete, then Thread 4 is spun up. But, after only one second Client 2 sends two new requests to be completed within 1 second. This process is called Request Queuing, as Client 2's request would be waiting in line for the first request to be completed.Ĭlient 1 sends 1 GLEWF request in, and it takes 30 seconds to complete. The queue will execute Client 1's request first (one request per thread) and then immediately schedule Client 2's request. If Client 1 sends 4 GLEWF (Get List Entry With Fields) request to this queue, at the same time Client 2 sends 4 of the same request, then all 4 threads will be spun up. This queue has two clients configured to connect to it. Jonnie is a Remedy admin at Calbro Services, where he has an AR System Server having a queue with configuration of two minimum threads and 4 maximum threads. ![]()
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