Solaris 11.1 swap分区如何看
我的一台服务器系统是Solaris 11.1，装的数据库Oracle 11.2，运行一段时间后，df -h看到的swap分区越来越小，从80G降到28G；曾出现过/tmp full的报错；下面是不同命令看到的swap分区的情况：swap -lh看到的是物理swap，但是为什么一点没用到；top看到的明明有64G free，为什么df -h只有28G？root@cdistdb1:~# df -h
Filesystem Size UsedAvailable CapacityMounted on
rpool/ROOT/solaris-3 272G 19G 107G 15% /
/devices 0K 0K 0K 0% /devices
/dev 0K 0K 0K 0% /dev
ctfs 0K 0K 0K 0% /system/contract
proc 0K 0K 0K 0% /proc
mnttab 0K 0K 0K 0% /etc/mnttab
swap 28G 52M 28G 1% /system/volatile
objfs 0K 0K 0K 0% /system/object
sharefs 0K 0K 0K 0% /etc/dfs/sharetab
fd 0K 0K 0K 0% /dev/fd
rpool/ROOT/solaris-3/var
272G 1.3G 107G 2% /var
swap 28G 104K 28G 1% /tmp
rpool/VARSHARE 272G 4.0G 107G 4% /var/share
rpool/export 272G 32K 107G 1% /export
rpool/export/home 272G 1.0M 107G 1% /export/home
rpool/export/home/apadmin
272G 35K 107G 1% /export/home/apadmin
rpool/export/home/db20
272G 94M 107G 1% /export/home/db20
rpool/export/home/nsumsmgr
272G 35K 107G 1% /export/home/nsumsmgr
rpool/export/home/oracle
272G 8.0G 107G 7% /export/home/oracle
rpool/export/home/vermgr
272G 891K 107G 1% /export/home/vermgr
rpool 272G 73K 107G 1% /rpool
/dev/lofi/8192 781M 3.9M 730M 1% /global/.devices/node@2
172.16.1.154:/t_hulft
512G 62G 450G 13% /opt/ecrb/hulft
172.16.1.156:/c_orashare
298G 9.3G 289G 4% /opt/oracle/cdist/share
172.16.1.156:/c_rls 298G 9.3G 289G 4% /rls
172.16.1.158:/c_logbk
104G 654M 104G 1% /log_backup
172.16.1.158:/c_dbbk 104G 654M 104G 1% /db_backup
172.16.1.158:/c_dbbk2
104G 654M 104G 1% /db_backup2
172.16.1.162:/cdistexp
112G 14G 97G 13% /opt/oracle/expdump
cdist_oradg01/c_appl 2.0T 24M 855G 1% /appl
cdist_oradg01 2.0T 1.1T 855G 58% /database
cdist_oradg01/c_batchshare
2.0T 944M 855G 1% /opt/oracle/cdist/batch_share
cdist_oradg01/c_javajob
2.0T 50M 855G 1% /opt/oracle/javajob
cdist_oradg01/c_proc 2.0T 1.2M 855G 1% /opt/oracle/proc
cdist_oradg01/c_tools
2.0T 189K 855G 1% /tools
cdist_jobdg01 49G 5.0M 49G 1% /opt/jobcenter
/dev/lofi/4096 781M 3.9M 730M 1% /global/.devices/node@1
root@cdistdb1:~# swap -sh
total: 45G allocated + 111G reserved = 155G used, 28G available
root@cdistdb1:~# swap -lh
swapfile dev swaplo blocks free
/dev/zvol/dsk/rpool/swap 285,2 8K 64G 64G
root@cdistdb1:~# top
last pid: 26225;load avg:2.19,1.74,1.80;up 2+12:22:24 09:45:02
265 processes: 257 sleeping, 3 zombie, 5 on cpu
CPU states: 98.3% idle,1.6% user,0.1% kernel,0.0% iowait,0.0% swap
Kernel: 5109 ctxsw, 733 trap, 5736 intr, 12881 syscall, 428 flt
Memory: 256G phys mem, 146G free mem, 64G total swap, 64G free swap 另外swap -sh看到的allocated + reserved 又是从哪里来的swap swap 28G 52M 28G 1% /system/volatile 这个挂载点没注意过。
zfs和ufs在对SWAP有什么区别么？没用过11的版本，zfs也很少用。 grep swap /etc/vfstab
zfs list rpool/swap
zfs get all rpool/swap
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