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Operating Systems Solaris Coredumps and swap - was part of Solaris Mem Consumption Post 302223579 by Neo on Sunday 10th of August 2008 05:13:06 AM
Old 08-10-2008
Quote:
Originally Posted by jlliagre
I'm afraid this statement is misleading.
Solaris still requires a single dump slice large enough for kernel crash dump data to be recorded, and there is no much point not using a swap area for it.
Even while this data is compressed since Solaris 8, I wouldn't recommend to use less than the RAM size as swap size as it is the only way to guarantee a crash dump will fit.
Most folks seem to say that 4GB is large enough for any Solaris core dump. In addition, you can specify to limit the size of the core dump.

Since I use Linux, I don't recall ever needing a core dump, and normally I find them a waste of disk space on most systems. Better to have a kernel that does not dump cores .... Smilie that you have massive core dumps.

In other words, I don't think that core dumps should be must of a factor in thinking about swap.
 

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vzcalc(8)							    Containers								 vzcalc(8)

NAME
vzcalc - calculate resource usage of a container SYNOPSIS
vzcalc [-v] CTID DESCRIPTION
This utility displays the share of the host system resources a particular container is using. If the container is running, the current usage is displayed. High utilization values (>100%) mean the system is overloaded (or the container has an invalid configuration). Current Shows the amount of the resources consumed by the container at a given time. Promised Shows the resources soft limit values "promised" for a given container. Max Shows the resources hard limit values "promised" for a given container. If the -v option is specified, the following additional information is also displayed: Low Mem The part of memory residing at lower addresses and directly accessed by the kernel (only makes sense for 32-bit architectures). Total RAM Total memory. Mem+Swap Amount of memory available for applications (both RAM and swap space). Alloc Mem Standard memory allocations made for applications in a container. This is a more "virtual" system resource than RAM or RAM and swap. Num. Proc Number of processes. OPTIONS
-v Display additional information. EXIT STATUS
Normally, the exit status is 0. On error, the exit status is 1. LICENSE
Copyright (C) 2000-2009, Parallels, Inc. Licensed under GNU GPL. OpenVZ 10 Dec 2009 vzcalc(8)
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