Skip to main content
NetApp Knowledge Base

Intermittent latency spikes and latency on remote disk

  1. Last updated
  2. Save as PDF
Views:
14
Visibility:
Public
Votes:
0
Category:
ontap-9
Specialty:
Perf
Last Updated:

Applies to

  • ONTAP 9
  • AFF -A400
  • MetroCluster
  • Disk X4013S17337T6NTE

Issue

  • High latency observed at certain times along with service outage on ESXI datastores
  • EMS logs shows the following messages during the time of the issue

[XXXXXX-XX:wafl_exempt18: wafl.cp.toolong:error]: Aggregate XXXX_XXXX_aggr1 experienceda long CP

[XXXXXX -XX:disk_latency_monitor: shm.ssd.threshold.ioLatency:notice]: SSD 0v.i1.2L20 hasexceeded the expected block latency in the current timeframe with an averagelatency of 4670 us and an average utilization of 11 percent. The next highestSSD latency: 110 us. Disk 0v.i1.2L20 Shelf 10 Bay 22 [NETAPP  X4013S17337T6NTE NA53] S/N [S60RNA0R900618] UID[36305230:52900618:00253841:00000002:00000000:00000000:00000000:00000000:00000000:00000000 

  • Back to back CP is observed with most time spent on P2 Flush phase
  • Latency is from one of the disks on the remote plex
  • Frequent disk failures seen on disk of the model [X4013S17337T6NTE] On the same Shelf 

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.