ONTAP-329751：nfs connected-clients APIなどのAPIコマンドを実行するとユーザまたはONTAPの処理速度が過度に低下する

問題

ESXi APDs may be seen or other client latency issues.
The qos statistics volume latency show command shows high Network latency.
High CPU in Exempt domain per sysstat -M 1 (see https://kb.netapp.com/on-prem/ontap/...PU_utilization)
Looking at the process using the most CPU, it is svc_queue_thread with the most CPU total.
Cluster::> set diag Cluster::*> statistics start -object process -counter pct_cpu -node node1 Warning: The existing sample will be overwritten for sample-id: :sample_310. Do you want to continue? {y|n}: y Statistics sample deleted, for sample-id: sample_310 Statistics collection is being started for sample-id: sample_310 Cluster::*> statistics show -filter "pct_cpu>5" -fields value object instance counter value ------- ------------------ ------- ----- .. process "svc_queue_thread" pct_cpu 22% process "svc_queue_thread" pct_cpu 21% ... Cluster::*> statistics stop
API calls are being driven for the REST API equivilent of nfs connected-clients show at a high rate (20/minute).
10.1.2.3 [Mon Oct 07 03:38:57.884998 2024 +0000] "GET /api/protocols/nfs/connected-clients?fields=server_ip%2Cclient_ip%2Cidle_duration&svm.name=svm1&volume.name=vol1 HTTP/1.1" 200 458 510788 - 0 + 127.0.0.1 -
The sktrace logs show this output:
2024-10-07T03:53:23Z 26130792276755676 [13:0] KSMF_SMF_SVC_NORM: process_request: Table: ksmf_nfs_show_clients is occupying at least half of kSMF threads. Active thread count:25