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Full Discussion: ZFS Filesystem
Operating Systems Solaris ZFS Filesystem Post 302952867 by tharmendran on Sunday 23rd of August 2015 11:40:54 PM
Old 08-24-2015
ZFS Filesystem

Hi,
Recently we have new server T5 Oracle. We set up it for our database. For out database files we set one zfs filesystem. When i use iostat -xc the output as below. As you see the value for vdc4 is quite high.

Code:
                 extended device statistics                      cpu
device    r/s    w/s   kr/s   kw/s wait actv  svc_t  %w  %b  us sy wt id
vdc0      0.6    3.9   10.8   37.5  0.0  0.0    1.9   0   0  10  7  0 83
vdc1     12.9    2.6 1644.2  309.9  0.0  0.1    7.6   0   1
vdc2      9.5    2.8 1208.8  351.9  0.0  0.1    8.4   0   1
vdc3      0.2    2.4   11.9   38.1  0.0  0.0    1.9   0   0
vdc4    266.6   83.1 32967.7 7561.5  0.0  3.2    9.1   0  65
vdc5      2.4    3.3  301.1  378.2  0.0  0.1   12.6   0   1
vdc6      5.8   52.1  715.3  718.0  0.0  0.1    2.4   0   6
vdc7      3.9   52.1  474.5  717.9  0.0  0.1    2.1   0   6
vdc8      0.0    0.0    0.0    0.0  0.0  0.0    2.3   0   0
nfs1      0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0

When i look on the output for memstat. The ZFS filesystem taking high mem percentange.

Code:
> ::memstat
Page Summary                Pages                MB  %Tot
------------     ----------------  ----------------  ----
Kernel                     355350              2776    8%
ZFS File Data             1660358             12971   40%
Anon                      1874388             14643   45%
Exec and libs               12338                96    0%
Page cache                 176508              1378    4%
Free (cachelist)             6483                50    0%
Free (freelist)            108879               850    3%
Total                    4194304             32768

Is this normal? When we database full backup the db will hang although the server load is normal during backup. Is that maybe related to the zfs filesystem setting? Hope can engligthen me on these.

Last edited by Don Cragun; 08-24-2015 at 01:37 AM.. Reason: Change ICODE tags to CODE tags, add ICODE tags.
 

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