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Aug
19
comment continous kernel EIP errors
If it's always in filesystem/journal related code then there is a change that fsck will help. PS. Also it's better to cut and paste starting from line ------------[ cut here ]------------
Jul
26
comment Join multiple filesystems (on multiple computers) into one big volume
To be taken seriously in Infiniband world ceph needs to implement native verbs interface. But still even with IPoIB on >= 12xQDR Infiniband ceph should be faster than 10G Ethernet interconnect.
Jul
12
comment How do I make OOM Killer more passive
I'm just used to it because it has -e flag that I was using when swapping on external flash drive. Here, yes I guess it's rather useless.
Jul
11
comment How do I make OOM Killer more passive
btw, vm.overcommit_ratio is used iff vm.overcommit_memory == 2, but default value is 0: lxr.free-electrons.com/source/mm/mmap.c#L134
Jul
2
comment Netstat -s showing (and growing) “packets pruned from receive queue” and “packets collapsed in receive queue”
Can you show output of sudo ss -lnp?
Jun
29
comment Does orientation affect hard drive lifespan?
May it be that just 99% of all laptops have HDD mounted upside down, so there is actually no correlation at all?
Jun
27
comment Yesterday-access.log is pointing to a different directory
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post - you can always comment on your own posts, and once you have sufficient reputation you will be able to comment on any post.
May
5
comment Chef stop and start service in sequence
Oops... My bad. Mistakenly rejected edit. Actually new versions of chef support not only resources(:service => "apache") but also "service[apache]" syntax. Just verified with 11.4.4. See docs at: docs.opscode.com/resource_common_notifications.html
Apr
22
comment ack-grep to ack in ubuntu
Am I the only one who thinks this is not secure?
Mar
3
comment Segfault PHP-FPM, Nginx, Freebsd
What is you APC version?
Feb
28
comment Segfault PHP-FPM, Nginx, Freebsd
Also, if you are not confident about debugging C/C++ code then you better off with something like updating APC/php from ports maybe with even slightly different make config
Feb
28
comment Segfault PHP-FPM, Nginx, Freebsd
set sysctl kern.coredump=1 and sysctl kern.corefile="/var/tmp/%U.%N.core" - path should have according permissions (i.e. 1777). Also don't forget to turn them off after debug.
Feb
25
comment Segfault PHP-FPM, Nginx, Freebsd
Turn on coredumps and analyze segfault dump with gdb - for the start simple bt is enough
Feb
25
comment Segfault PHP-FPM, Nginx, Freebsd
Do you use APC (pecl.php.net/package/APC) ?
Feb
1
comment Linux process swap usage is greater than the overall system swap usage
Very accurate: one can take a look at man top from Debian/Ubuntu procps package which has patched(./debian/patches/top_1_swap.patch) man page that explains precisely how SWAP is computed in top: manpages.ubuntu.com/manpages/precise/en/man1/top.1.html
Dec
23
comment HPET missing from available clocksources on CentOS
Try upgrading BIOS to 1.0b
Dec
22
comment Tune Linux kernel against SYN flood attack
You could just give an example of some Linux compile-time tunables (i.e. some of them gist.github.com/2407652) it would be more relevant.
Dec
21
comment Tune Linux kernel against SYN flood attack
Digital Unix? Is it even relevant? Question is definitely about Linux and judging by file names Tru64 has a BSD derivative TCP/IP stack.
Oct
30
comment FreeBSD Listen Queue Overflows - can't increase max queue size
Also, did you restart nginx after changing kern.ipc.somaxconn?
Sep
18
comment How are r— directory permissions supposed to work on Linux?
I suppose you can explain mode_t thing a little bit more (esp. part where permissions and file type are stored in same 32bit field)