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Messaging Server/ZFS Performance TroubleShooting Master Note (Doc ID 1365183.1)

Last updated on JULY 01, 2019

Applies to:

Oracle Communications Messaging Server - Version 6.3 and later
Information in this document applies to any platform.

Purpose

Provide pointers to known issues and best practices around Messaging Server performance problems related to ZFS file systems.

Troubleshooting Steps

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In this Document
Purpose
Troubleshooting Steps
 Messaging Server tuning/best practices articles
 Disable access time recording
 other items - work-in-progress
 Known bugs
 Collaboration Service Requests
 Information to gather
 Recognize symptoms
 Performance troubleshooting
 when invoke ZFS team
 DTrace scripts useful for these problems
 Long Term Statistics -- Comparison and Capacity Planning
 fsstat vs iostat vs zpool iostat
 zpool iostat
 fsstat - normal IO
 fsstat - mmap/paging
 how to map ZFS pool or file system to devices in iostat???
 zfs_vdev_max_pending¬†
 zfs_mg_skip_threshold
References

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