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PLA-Support>Sun Systems>DISK>ZFS Storage>SN-DK: ZS-ES
 

In this Document

Symptoms

Changes

Cause

Solution

References

Created from <SR 3-16836721641>

Applies to:

Symptoms

Oracle WebCenter Sites reports page loads taking a long time and provides benchmark results showing the following:

Benchmark Results

File System Path Create µs Write µs Read µs Delete µs
local /u01/oracle/product/fmw/middleware/user_projects/domains/sitessit_domain/servers/wcsites_server1/tmp/_WL_user/sites/3mxfs3/public 24623 10902 9951 1544
Benchmark 91 160 44 101

data /u01/oracle/product/fmw/middleware/user_projects/domains/sitessit_domain/wcsites/wcsites/config/ccurl/ 24351 11280 9894 1582
Benchmark 3883 12420 2741 3042

spc /u01/oracle/product/fmw/middleware/user_projects/domains/sitessit_domain/wcsites/wcsites/config/SystemPageCache/ 25481 11061 9933 1575
Benchmark 3733 12627 2771 3118

sync /webcenter/sit/sites-shared/config/clustersync 24659 11541 9984 1490
Benchmark 3734 12499 2761 3184

Changes

Cause

Caching was being done for Oracle WebCenter Sites client on NFS share from ZFSSA.

Solution

Fundamentally, all caching should be done from the nearest resource.

Ideally, the fastest caching will always be from on-board memory.  If memory is in short supply, local disk would be the next fastest option.

As a last resort, an NFS network share from the ZFSSA can be used, but this is outside of Best Practices.

More information regarding timings from Oracle WebCenter Sites can be found here :

Doc ID 2071559.1 (STUCK thread in TIMED_WAITING (sleeping) state for a long time at net.sf.ehcache.Cache.backOffIfDiskSpoolFull())

References

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