Expert Oracle Exadata - Parent Directory

CHAPTER 5 EXADATA SMART FLASH CACHEFC_IO_RQ_W FLASHCACHE 304,286,158 IO requestsFC_IO_RQ_W_SEC FLASHCACHE 22.4 IO/secCellCLI> LIST METRICCURRENT WHERE objectType = 'FLASHCACHE' AND name LIKE '.*KEEP.*'FC_BYKEEP_OVERWR FLASHCACHE 0.0 MBFC_BYKEEP_OVERWR_SEC FLASHCACHE 0.0 MB/secFC_BYKEEP_USED FLASHCACHE 5,072 MBFC_IO_BYKEEP_R FLASHCACHE 80,288 MBFC_IO_BYKEEP_R_SEC FLASHCACHE 0.0 MB/secFC_IO_BYKEEP_W FLASHCACHE 11,134 MBFC_IO_BYKEEP_W_SEC FLASHCACHE 0.0 MB/secFC_IO_RQKEEP_R FLASHCACHE 91,231 IO requestsFC_IO_RQKEEP_R_MISS FLASHCACHE 11,155 IO requestsFC_IO_RQKEEP_R_MISS_SEC FLASHCACHE 0.0 IO/secFC_IO_RQKEEP_R_SEC FLASHCACHE 0.0 IO/secFC_IO_RQKEEP_R_SKIP FLASHCACHE 1,532 IO requestsFC_IO_RQKEEP_R_SKIP_SEC FLASHCACHE 0.0 IO/secFC_IO_RQKEEP_W FLASHCACHE 17,794 IO requestsFC_IO_RQKEEP_W_SEC FLASHCACHE 0.0 IO/secIn addition to the performance metrics, you can also see what objects are in the cache. The LISTFLASHCACHECURRENT command displays what’s in the cache. This command shows a single entry for eachcached object, the amount of space it is occupying, and various other statistics. Here’s an example oflooking at the flash cache content:CellCLI> describe flashcachecontentcachedKeepSizecachedSizedbIDdbUniqueNamehitCounthoursToExpirationmissCountobjectNumbertableSpaceNumberCellCLI> list flashcachecontent where dbUniqueName like 'EXDB' -> and hitcount > 100 -> attributes dbUniqueName, objectNumber, cachedKeepSize, -> cachedSize, hitCount, missCountEXDB 2 0 4194304 587 208EXDB 40 0 2424832 376 60EXDB 383 0 2146304 117 27EXDB 471 0 4071424 274 85EXDB 475 0 5881856 503 123EXDB 503 0 5308416 669 455EXDB 6373 0 2539520 122 39EXDB 66849 438763520 438763520 420 3322138