Need to know who to set gh_chunks and what effect this would have
on SHHMAX. DU 4.0B 6Gig of memory. Large Oracle 7.3.3 database.
Hoping you could shed some light on following:
The ipc paramaters for the sites new 8400 are:
ipc: loaded and configured
fabu01# /sbin/sysconfig -q ipc
ipc:
msg-max = 8192
msg-mnb = 32768
msg-mni = 2048
msg-tql = 8192
shm-max = 1069547520
shm-min = 1
shm-mni = 128
shm-seg = 32
sem-mni = 512
sem-msl = 400
sem-opm = 400
sem-ume = 400
sem-vmx = 32767
fabu01# /sbin/sysconfig -q vm
vm:
ubc-minpercent = 5
ubc-maxpercent = 15
ubc-borrowpercent = 20
ubc-maxdirtywrites = 5
ubc-nfsloopback = 0
vm-max-wrpgio-kluster = 32768
vm-max-rdpgio-kluster = 16384
vm-cowfaults = 4
vm-mapentries = 400
vm-maxvas = 1073741824
vm-maxwire = 16777216
vm-heappercent = 7
vm-vpagemax = 16384
vm-segmentation = 1
vm-ubcpagesteal = 24
vm-ubcdirtypercent = 10
vm-ubcseqstartpercent = 50
vm-ubcseqpercent = 10
vm-csubmapsize = 1048576
vm-ubcbuffers = 256
vm-syncswapbuffers = 128
vm-asyncswapbuffers = 4
vm-clustermap = 1048576
vm-clustersize = 65536
vm-zone_size = 0
vm-kentry_zone_size = 16777216
vm-syswiredpercent = 80
vm-inswappedmin = 1
vm-page-free-target = 128
vm-page-free-swap = 74
vm-page-free-min = 20
vm-page-free-reserved = 10
vm-page-free-optimal = 74
vm-page-prewrite-target = 256
dump-user-pte-pages = 0
kernel-stack-guard-pages = 1
vm-min-kernel-address = 18446744065119617024
malloc-percpu-cache = 1
contig-malloc-percent = 20
vm-aggressive-swap = 0
vm-map-index-count = 64
vm-map-index-rebalance = 128
vm-map-index-enabled = 1
vm-map-index-hiwat = 4
vm-map-index-lowat = 2
new-wire-method = 1
vm-segment-cache-max = 50
vm-page-lock-count = 512
gh-chunks = 0
gh-min-seg-size = 8388608
gh-fail-if-no-mem = 1
This says that SHMMAX is 1069547520. The default setting is 4194304.
When I issue the tstshm command I get following:
fabu01 (ora) /apps/oracle/product/7.3.3 >tstshm Number of segments
gotten by shmget() = 50 Number of segments attached by shmat() = 31
Odd-sized segments are rounded up to even size Segments attach at
higher addresses
Default shared memory address = 0x10000 Lowest shared memory address
= 0x10000 Highest shared memory address = 0x11fc10000
Total shared memory range = 4831838208 (0x120000000) Total shared
memory attached = 134217696 (0x7ffffe0) Largest single segment size
= 4194304 (0x400000) Segment boundaries (SHMLBA) = 8192
(0x2000)
Why is not the "Largest single segment size" larger? Will this effect
performance.
Thanks,
Received on Fri Apr 24 1998 - 17:33:42 NZST