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Do you have any different options flexscale settings?
Specifically looking to see if maybe one has flexscale.lopri_blocks on.
I would have though specifically, Network Sahres, Exchange and vmware would have good cache hit ratios. Or maybe you have 1 or a small handful of guests doing the majority of your i/o.
From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net]
On Behalf Of Sayla, Mustafa
Sent: Thursday, February 20, 2014 11:23 AM
To: toasters@teaparty.net
Subject: Flash Cache counters
We have two systems and their flexscale output is given below. System with the low hit percentage is a very busy system with Network shares, Exchange 2010 and VMware on it. I am seeing very low hit percentage for flexcache and want to know
if this should be a concern.
System with high usage but very low hit percentage
Cache Reads Writes Disk Reads
Usage Hit Meta Miss Hit Evict Inval Insert Chain Blocks Chain Blocks Replaced
% /s /s /s % /s /s /s /s /s /s /s /s
94 1455 806 18651 7 272 46 2359 932 1371 36 2349 932
94 2652 1403 17888 12 473 879 3867 1606 2229 60 3880 1606
94 1522 655 17594 7 313 863 2454 859 1435 38 2451 859
94 2174 1105 17942 10 291 8 2805 1266 1992 43 2808 1266
94 1823 828 17224 9 267 92 2169 936 1724 33 2160 936
94 1447 632 17515 7 361 12392 2851 752 1273 44 2847 752
System with high usage and also high hit percentage
Cache Reads Writes Disk Reads
Usage Hit Meta Miss Hit Evict Inval Insert Chain Blocks Chain Blocks Replaced
% /s /s /s % /s /s /s /s /s /s /s /s
97 94 4 5 94 0 0 0 20 93 0 0 20
97 126 25 13 90 0 0 2 45 126 0 0 45
97 57 3 8 87 0 0 0 12 57 0 0 12
97 356 300 35 90 0 0 0 309 356 0 0 309
97 224 38 19 91 1 0 24 63 224 0 31 63
97 92 10 13 87 0 0 0 27 92 0 0 27
97 151 68 14 91 44 0 1387 82 150 21 1376 82
Mustafa
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