 | | | System boot hangs when using vm.hugetlb_pool | System boot hangs when using vm.hugetlb_pool 2005-10-05 - By Hoover Mark A AISC CONT
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I've got a SUN SunFire V40z with 24GB of RAM. I'm trying to set
vm.hugetlb_pool to 16GB for use with an Oracle SGA. However, when I set
vm.hugetlb_pool larger than 6GB, the system hangs at "Configuring kernel
parameters".
However, if I set it to 16GB (16384) and then run "sysctl -p" it works fine.
total: used: free: shared: buffers: cached:
Mem: 24375545856 6599839744 17775706112 0 15970304 53121024
Swap: 8587182080 0 8587182080
MemTotal: 23804244 kB
MemFree: 17359088 kB
MemShared: 0 kB
Buffers: 15596 kB
Cached: 51876 kB
SwapCached: 0 kB
Active: 88260 kB
ActiveAnon: 38472 kB
ActiveCache: 49788 kB
Inact_dirty: 9428 kB
Inact_laundry: 2964 kB
Inact_clean: 4820 kB
Inact_target: 21092 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 23804244 kB
LowFree: 17359088 kB
SwapTotal: 8385920 kB
SwapFree: 8385920 kB
CommitLimit: 20288040 kB
Committed_AS: 55844 kB
HugePages_Total: 3072
HugePages_Free: 3072
Hugepagesize: 2048 kB
# Kernel sysctl configuration file for Red Hat Linux
#
# For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and
# sysctl.conf(5) for more details.
# Controls IP packet forwarding
net.ipv4.ip_forward = 0
# Controls source route verification
net.ipv4.conf.default.rp_filter = 1
# Disables IP source routing
net.ipv4.conf.default.accept_source_route = 0
# Increases the size of the socket queue (effectively, q0)
net.ipv4.tcp_max_syn_backlog = 4096
# Controls the System Request debugging functionality of the kernel
kernel.sysrq = 0
# Controls whether core dumps will append the PID to the core filename.
# Useful for debugging multi-threaded applications.
kernel.core_uses_pid = 1
# entries required by oracle
kernel.sem=256 32000 100 142 # This sets SEMMSL, SEMMNS,
SEMOPM, SEMMNI
#kernel.shmmax=4294967295
#kernel.shmmax=34359738368
kernel.shmmax=24375545856
kernel.shmmni=4096
kernel.shmseg=4096
#kernel.shmall=3279547
kernel.shmall=8388608
fs.file-max=327679
kernel.msgmni=2878
kernel.msgmax=8192
kernel.msgmnb=360000
net.ipv4.ip_local_port_range=1024 65000
# entries for oracle RAC interconnect
net.core.rmem_default=262144 # Default setting of the socket receive buffer
net.core.wmem_default=262144 # Default setting of the socket send buffer
net.core.rmem_max=262144 # Max socket receive buffer size
net.core.wmem_max=262144 # Max socket send buffer size
# enable hugepage support for Oracle
#vm.hugetlb_pool=16388
#vm.hugetlb_pool=4096
vm.hugetlb_pool=6144
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