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Full Discussion: Possible to increase swap size for existing UFS-based drive slice?
Operating Systems Solaris Possible to increase swap size for existing UFS-based drive slice? Post 302798089 by JT-KGY on Tuesday 23rd of April 2013 07:47:30 PM
Old 04-23-2013
Possible to increase swap size for existing UFS-based drive slice?
I like to increase swap size for my current server running solaris 10.
Seems like the system is not using it's full 16G of physical memory.

Code:
#swap -l
swapfile             dev  swaplo blocks   free
/dev/dsk/c0t0d0s1   32,1      16 1058288 1058288

Code:
# swap -s
total: 4125120k bytes allocated + 178808k reserved = 4303928k used, 595088k available

Code:
# format
Searching for disks...done


AVAILABLE DISK SELECTIONS:
       0. c0t0d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
          /pci@780/pci@0/pci@9/scsi@0/sd@0,0
       1. c0t1d0 <HITACHI-H101473SCSUN72G-SA23-68.37GB>
          /pci@780/pci@0/pci@9/scsi@0/sd@1,0
       2. c2t0d0 <SEAGATE-ST314655SSUN146G-0B92-136.73GB>
          /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@0,0
       3. c2t1d0 <SEAGATE-ST314655SSUN146G-0B92-136.73GB>
          /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@1,0
       4. c2t2d0 <SEAGATE-ST314655SSUN146G-0B92-136.73GB>
          /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@2,0
       5. c2t3d0 <SEAGATE-ST314655SSUN146G-0B92-136.73GB>
          /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@3,0
       6. c2t4d0 <SEAGATE-ST314655SSUN146G-0B92-136.73GB>
          /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@4,0
       7. c2t5d0 <SEAGATE-ST314655SSUN146G-0B92-136.73GB>
          /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@5,0
       8. c2t6d0 <SEAGATE-ST314655SSUN146G-0B92-136.73GB>
          /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@6,0
       9. c2t7d0 <SEAGATE-ST314655SSUN146G-0B92-136.73GB>
          /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@7,0
      10. c2t8d0 <SEAGATE-ST314655SSUN146G-0B92-136.73GB>
          /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@8,0
      11. c2t9d0 <SEAGATE-ST314655SSUN146G-0B92-136.73GB>
          /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@9,0
      12. c2t10d0 <SEAGATE-ST314655SSUN146G-0B92-136.73GB>
          /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@a,0
Specify disk (enter its number): 0
selecting c0t0d0
[disk formatted]
Warning: Current Disk has mounted partitions.
/dev/dsk/c0t0d0s0 is currently mounted on /. Please see umount(1M).
/dev/dsk/c0t0d0s1 is currently used by swap. Please see swap(1M).
/dev/dsk/c0t0d0s7 is currently mounted on /export/home. Please see umount(1M).

partition> print
Current partition table (original):
Total disk cylinders available: 14087 + 2 (reserved cylinders)

Part      Tag    Flag     Cylinders         Size            Blocks
  0       root    wm     104 -  1224        5.44GB    (1121/0/0)   11407296
  1       swap    wu       0 -   103      516.75MB    (104/0/0)     1058304
  2     backup    wm       0 - 14086       68.35GB    (14087/0/0) 143349312
  3 unassigned    wm       0                0         (0/0/0)             0
  4 unassigned    wm       0                0         (0/0/0)             0
  5 unassigned    wm       0                0         (0/0/0)             0
  6 unassigned    wm       0                0         (0/0/0)             0
  7       home    wm    1225 - 14086       62.41GB    (12862/0/0) 130883712

Looks like only 516.75MB allocated for swap?

Code:
# zpool status
  pool: adpool03
 state: ONLINE
 scrub: none requested
config:

        NAME        STATE     READ WRITE CKSUM
        adpool03    ONLINE       0     0     0
          c0t1d0    ONLINE       0     0     0

errors: No known data errors

  pool: rz2pool
 state: ONLINE
 scrub: none requested
config:

        NAME         STATE     READ WRITE CKSUM
        rz2pool      ONLINE       0     0     0
          raidz2     ONLINE       0     0     0
            c2t0d0   ONLINE       0     0     0
            c2t1d0   ONLINE       0     0     0
            c2t2d0   ONLINE       0     0     0
            c2t3d0   ONLINE       0     0     0
            c2t4d0   ONLINE       0     0     0
            c2t5d0   ONLINE       0     0     0
            c2t6d0   ONLINE       0     0     0
            c2t7d0   ONLINE       0     0     0
            c2t8d0   ONLINE       0     0     0
            c2t9d0   ONLINE       0     0     0
            c2t10d0  ONLINE       0     0     0

errors: No known data errors

Strange part is.... c2t0d0 is also part of a ZFS??

Can someone help me decode this? I inherited this system.
Is the only way to increase swap is to create another swap file (say in /home)?

Any help much appreciated!
 

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