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156 Storage Management with DB2 for OS/390
Figure 77. Cache Activity Summary
Figure 78. IXFP Summary
CACHE ACTIVITY
normal sequent normal sequent destage sequent
field rate read read staging staging async icl read
unit io/s io/s io/s trk/s trk/s io/s io/s hit ratio
RVA_1
1st LCU 18.2 0.4 17.8 0.2 41.1 0 0 0.999
2nd LCU 10.1 0.1 10.0 0 23 0 0 1
3rd LCU 15.9 2.5 13.5 0.1 30.3 0 0 1
4th LCU mmmmmmmm
tot 44.2 3.0 41.3 0.3 94.4 0,0 0.0
RVA_2
1st LCU 4.2 0.1 4.2 0 9.6 0 0 1
2nd LCU 15.9 4.2 11.8 0.1 26.8 0 0 0.996
3rd LCU 16.8 0.0 16.7 0 38.6 0 0 1
4th LCU mmmmmmmm
tot 36.9 4.3 32.7 0.1 75.0 0.0 0.0
RVA 81.1 7.3 74.0 0.4 169.4 0.0 0.0
Legend:
icl Inhibit cache load = DB2 bypass cache
m missing data
IXFP
io_rate Kbyte/s io serv disc conn stage hits/stg r_hit comp ncl
ssch/sec ms ms ms trk/s ratio % ratio %
rva 1 45.700 5481.4 30.6 7.3 23.3 113.2 0.5 99.3 3.1 56.4
rva 2 44.500 5036.8 29.8 7.8 22.0 103 0.5 99.9 1.9 25.2
rva 1+2 90.2 10518 30.2 7.5 22.7 216.2
KB / I/O 116.61