P650-AIX5206-Oracle 9i server installed-Database established on raw device
phenomenon:
Physical PagingSpace
x% Used 44.4% 9.4%
x% Free 55.6% 90.6%
xMB Used 3634.2MB 383.0MB
xMB Free 4557.8MB 3713.0MB
xTotal(MB) 8192.0MB 4096.0MB
Above output is from nmon
I want to understand why Aix begin to use pagingspace while the physical memory was not used up ?
Here supply the vmm parameter settings of my host:
cpu_scale_memp = 8
data_stagger_interval = 161
defps = 1
force_relalias_lite = 0
framesets = 2
htabscale = -1
kernel_heap_psize = 4096
large_page_heap_size = 0
lgpg_regions = 0
lgpg_size = 0
low_ps_handling = 1
lru_file_repage = 1
lru_poll_interval = 0
lrubucket = 131072
maxclient% = 5
maxfree = 128
maxperm = 98195
maxperm% = 5
maxpin = 1677722
maxpin% = 80
mbuf_heap_psize = 4096
memory_affinity = 1
memory_frames = 2097152
mempools = 1
minfree = 120
minperm = 58917
minperm% = 3
nokilluid = 0
npskill = 8192
npswarn = 32768
num_spec_dataseg = 0
numpsblks = 1048576
pagecoloring = 0
pinnable_frames = 1694006
pta_balance_threshold = 0
relalias_percentage = 0
soft_min_lgpgs_vmpool = 0
spec_dataseg_int = 512
strict_maxclient = 1
strict_maxperm = 1
v_pinshm = 0
vmm_fork_policy = 0
hd_pbuf_cnt = 2816
hd_pvs_opn = 18
j2_dynamicBufferPreallocation = 16
j2_inodeCacheSize = 400
j2_maxPageReadAhead = 128
j2_maxRandomWrite = 0
j2_maxUsableMaxTransfer = 512
j2_metadataCacheSize = 400
j2_minPageReadAhead = 2
j2_nBufferPerPagerDevice = 512
j2_nPagesPerWriteBehindCluster = 32
j2_nRandomCluster = 0
j2_non_fatal_crashes_system = 0
j2_syncModifiedMapped = 1
jfs_clread_enabled = 0
jfs_use_read_lock = 1
lvm_bufcnt = 9
maxpgahead = 8
maxrandwrt = 1
memory_frames = 2097152
minpgahead = 2
numclust = 16
numfsbufs = 196
pd_npages = 65536
pgahd_scale_thresh = 0
sync_release_ilock = 1
hd_pendqblked = 250686
psbufwaitcnt = 0
fsbufwaitcnt = 2996
rfsbufwaitcnt = 0
xpagerbufwaitcnt = 1141608
phenomenon:
Physical PagingSpace
x% Used 44.4% 9.4%
x% Free 55.6% 90.6%
xMB Used 3634.2MB 383.0MB
xMB Free 4557.8MB 3713.0MB
xTotal(MB) 8192.0MB 4096.0MB
Above output is from nmon
I want to understand why Aix begin to use pagingspace while the physical memory was not used up ?
Here supply the vmm parameter settings of my host:
cpu_scale_memp = 8
data_stagger_interval = 161
defps = 1
force_relalias_lite = 0
framesets = 2
htabscale = -1
kernel_heap_psize = 4096
large_page_heap_size = 0
lgpg_regions = 0
lgpg_size = 0
low_ps_handling = 1
lru_file_repage = 1
lru_poll_interval = 0
lrubucket = 131072
maxclient% = 5
maxfree = 128
maxperm = 98195
maxperm% = 5
maxpin = 1677722
maxpin% = 80
mbuf_heap_psize = 4096
memory_affinity = 1
memory_frames = 2097152
mempools = 1
minfree = 120
minperm = 58917
minperm% = 3
nokilluid = 0
npskill = 8192
npswarn = 32768
num_spec_dataseg = 0
numpsblks = 1048576
pagecoloring = 0
pinnable_frames = 1694006
pta_balance_threshold = 0
relalias_percentage = 0
soft_min_lgpgs_vmpool = 0
spec_dataseg_int = 512
strict_maxclient = 1
strict_maxperm = 1
v_pinshm = 0
vmm_fork_policy = 0
hd_pbuf_cnt = 2816
hd_pvs_opn = 18
j2_dynamicBufferPreallocation = 16
j2_inodeCacheSize = 400
j2_maxPageReadAhead = 128
j2_maxRandomWrite = 0
j2_maxUsableMaxTransfer = 512
j2_metadataCacheSize = 400
j2_minPageReadAhead = 2
j2_nBufferPerPagerDevice = 512
j2_nPagesPerWriteBehindCluster = 32
j2_nRandomCluster = 0
j2_non_fatal_crashes_system = 0
j2_syncModifiedMapped = 1
jfs_clread_enabled = 0
jfs_use_read_lock = 1
lvm_bufcnt = 9
maxpgahead = 8
maxrandwrt = 1
memory_frames = 2097152
minpgahead = 2
numclust = 16
numfsbufs = 196
pd_npages = 65536
pgahd_scale_thresh = 0
sync_release_ilock = 1
hd_pendqblked = 250686
psbufwaitcnt = 0
fsbufwaitcnt = 2996
rfsbufwaitcnt = 0
xpagerbufwaitcnt = 1141608