Memory allocation problems on RHEL 6.3 kernel version 2.6.32-279.el6.x86_64

[Amit Agarwal]

Hi Dave,

On 11-07-2014 12:29, Dave Tian wrote:
> Compare the .config and ‘sysctl -a’ of the two running system may give a hint from the kernel configuration and running parameters. ‘sysctl -a’ may be much more useful in this case, I guess.
>
I compared the config files and they are verbatim same. For sysctl, 
there are some differences which I felt should not matter in this case. 
However I am attaching the diff, in case I missed something.

-- 
Thanks,
-aka
http://blog.amit-agarwal.co.in

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Left file: System having issue
Right file: Working system
21   kernel.core_pattern = core.%p                                     <> 20   kernel.core_pattern = |/usr/libexec/abrt-hook-ccpp %s %c %p %u %g %t e
22   kernel.core_pipe_limit = 0                                           21   kernel.core_pipe_limit = 4
37   kernel.threads-max = 254259                                       <> 36   kernel.threads-max = 192117
39   kernel.random.entropy_avail = 129                                 <> 38   kernel.random.entropy_avail = 3468
48   kernel.pid_max = 65536                                            <> 47   kernel.pid_max = 32768
83   kernel.slow-work.max-threads = 64                                 <> 82   kernel.slow-work.max-threads = 32
381  kernel.hostname = <hostname stripped>                             <> 668  kernel.hostname = <hostname stripped>
388  kernel.msgmni = 256                                               <> 675  kernel.msgmni = 24044
389  kernel.msgmnb = 780000                                               676  kernel.msgmnb = 65536
391  kernel.auto_msgmni = 0                                            <> 678  kernel.auto_msgmni = 1
393  kernel.pty.nr = 859                                               <> 680  kernel.pty.nr = 13
416  vm.drop_caches = 1                                                <> 703  vm.drop_caches = 0
417  vm.min_free_kbytes = 128                                             704  vm.min_free_kbytes = 65535
434  fs.inode-nr = 285525    0                                         <> 721  fs.inode-nr = 13704     2128
435  fs.inode-state = 285525 0       0       0       0       0       0    722  fs.inode-state = 13704  2128    0       0       0       0       0
436  fs.file-nr = 1760       0       1606964                              723  fs.file-nr = 1216       0       1214127
437  fs.file-max = 1606964                                                724  fs.file-max = 1214127
439  fs.dentry-state = 1498730       1490314 45      0       0       0 <> 726  fs.dentry-state = 11667 3756    45      0       0       0
445  fs.aio-nr = 896                                                   <> 732  fs.aio-nr = 0
450  fs.epoll.max_user_watches = 3332628                               <> 737  fs.epoll.max_user_watches = 2518118
451  fs.suid_dumpable = 1                                                 738  fs.suid_dumpable = 0
467  fs.nfs.nlm_grace_period = 0                                       +-
468  fs.nfs.nlm_timeout = 10
469  fs.nfs.nlm_udpport = 0
470  fs.nfs.nlm_tcpport = 0
471  fs.nfs.nsm_use_hostnames = 0
472  fs.nfs.nsm_local_state = 0
549  net.netfilter.nf_conntrack_count = 23                             <> 830  net.netfilter.nf_conntrack_count = 164
560  net.core.rmem_max = 16777216                                      <> 841  net.core.rmem_max = 131071
797  net.ipv4.tcp_mem = 1525536      2034048 3051072                   <> 1036 net.ipv4.tcp_mem = 1152672      1536896 2305344
798  net.ipv4.tcp_wmem = 4096        65535   16777216                     1037 net.ipv4.tcp_wmem = 4096        16384   4194304
799  net.ipv4.tcp_rmem = 4096        65535   16777216                     1038 net.ipv4.tcp_rmem = 4096        87380   4194304
814  net.ipv4.tcp_dma_copybreak = 262144                               <> 1053 net.ipv4.tcp_dma_copybreak = 4096
825  net.ipv4.udp_mem = 1525536      2034048 3051072                   <> 1064 net.ipv4.udp_mem = 1152672      1536896 2305344