February 2020
Intermediate to advanced
734 pages
38h 13m
English
Content preview from PostgreSQL 12 High Availability Cookbook - Third Edition
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How to do it...
Assuming pg1 is our current primary node and /dev/VG_POSTGRES/LV_DATA is the device we formatted with XFS, follow these steps as the root user:
- Examine the current fragmentation status with this command:
xfs_db -f -c frag /dev/VG_POSTGRES/LV_DATA
- Defragment the filesystem with xfs_fsr:
xfs_fsr -t 600 /dev/VG_POSTGRES/LV_DATA
- Afterward, view the real-time fragmentation status:
xfs_db -f -c frag -r /dev/VG_POSTGRES/LV_DATA
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