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Operating Systems Solaris Want to expand Solaris 10_x86 root UFS partition Post 302225291 by Neo on Friday 15th of August 2008 04:55:11 AM
Old 08-15-2008
Quote:
Originally Posted by b1f30
I found a huge vmcore file that was 600+MB. None of my lab people needed it.....
This is a reason that many people simply set the file size of core files and dumps to zero (or simply disable completely), as they don't debug them (since they are not application or kernel developers).

If you don't use them and do not actively look for or manage them, they can really cause problems, as you experienced.

So, if you are not using them (or do not know how to use them), just disable them.....

You can always turn them back on if you start to see problems where you might need a core file, etc

Edit: See also:

http://developers.sun.com/solaris/ar...core_dump.html

See for example, this example, in the link above:

Below is a typical scenario, which shows the current system configuration for core dumps:

Quote:
-bash-3.00# coreadm
global core file pattern:
global core file content: default
init core file pattern: core
init core file content: default
global core dumps: disabled
per-process core dumps: enabled
global setid core dumps: disabled
per-process setid core dumps: disabled
global core dump logging: disabled
 

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gcore(1)                                                           User Commands                                                          gcore(1)

NAME
gcore - get core images of running processes SYNOPSIS
gcore [-pgF] [-o filename] [-c content] process-id... DESCRIPTION
The gcore utility creates a core image of each specified process. By default, the name of the core image file for the process whose process ID is process-id will be core.process-id. OPTIONS
The following options are supported: -c content Produces core image files with the specified content. The content description uses the same tokens as in coreadm(1M). The -c option does not apply to cores produced due to the -p or -g flags. -F Force. Grabs the target process even if another process has control. -g Produces core image files in the global core file repository with the global content as configured by coreadm(1M). The com- mand will fail if the user does not have permissions to the global core file repository. -o filename Substitutes filename in place of core as the first part of the name of the core image files. filename can contain the same tokens to be expanded as the paths in coreadm(1M). -p Produces a core image file in the process-specific location with the process-specific content for each process as config- ured by coreadm(1M). The command will fail if the user does not have permissions to the per-process core file repository. OPERANDS
The following operand is supported: process-id process ID EXIT STATUS
The following exit values are returned: 0 On success. non-zero On failure, such as non-existent process ID. FILES
core.process-id core images ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWtoo | +-----------------------------+-----------------------------+ |Interface Stability |See below. | +-----------------------------+-----------------------------+ Command Syntax is Evolving. Output Format(s) are Unstable. SEE ALSO
kill(1), coreadm(1M), setrlimit(2), core(4), proc(4), attributes(5) NOTES
gcore is unaffected by the setrlimit(2) system call using the RLIMIT_CORE value. SunOS 5.10 11 Feb 2004 gcore(1)
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