Oracle Solaris ZFS File System (MOSC)

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zfs arc

in Oracle Solaris ZFS File System (MOSC) 4 commentsAnswered ✓

Hi,

I like to adjust the zfs cache on a server with oracle database.THe server has 50 Gb RAM.

I found somewhere this for a system with 50 Gb RAM and one oracle instance.

| Component |Recommended memmory |

| SGA (Buffer Cache) | 18 - 20 GB |

| PGA  | 2 - 3 GB |

| ZFS ARC  | 2 GB (maxim absolut) |

| OS + the other things | 6 - 8 GB |

Is the above correct?

On the server now :

kstat -m zfs -p
zfs:0:arcstats:buf_size 12757512
zfs:0:arcstats:c 343597383
zfs:0:arcstats:c_max 4294967296 ->4g
zfs:0:arcstats:c_min 343597383

Does arcstat show the current zfs cache?

echo ::memstat|mdb -k
Usage Type/Subtype Pages Bytes %Tot %Tot/%Subt

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