garbage collection not reflected in the nmon


 
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Operating Systems AIX garbage collection not reflected in the nmon
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Old 10-31-2008
garbage collection not reflected in the nmon

i have my application running on AIX box (configuration given below)
My application does garbage collection pretty well, as such the memory free shows 500 MB - 700 MB freed up in the log statements printed in the application, but the nmon shows the physical space going upwards and does not reflect the garbage collection that was done. What could be the reason ?

Configuration..

8 - CPUs currently
8 - CPUs configured
1900 - MHz CPU clock rate
PowerPC_POWER5 - Processor
64 bit - Hardware
64 bit - Kernel
Dynamic - Logical Partition
5.3.0.50 ML05 - AIX Kernel Version
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ELK(1)							      General Commands Manual							    ELK(1)

NAME
elk, scheme-elk - extensible Scheme interpreter SYNOPSIS
elk [ -l file ] [ -h KBytes ] [ -p load-path ] [ -g ] [ -i ] [ -v type ] [[ -- ] args] elk... DESCRIPTION
Elk (Extension Language Kit) is a Scheme implementation designed as a general extension language for applications written in C or C++. Normally, Elk is linked with the application it serves, but a stand-alone version of the Scheme interpreter is installed as well (usually under the name elk). This interpreter, together with the standard Scheme toplevel, Elk can be used as an ordinary, stand-alone implementa- tion of the Scheme language. When called without the -l option, Elk loads the standard "toplevel" to start an interactive session. When called with -l file, the con- tents of the specified file is loaded instead. If a `-' is given as a filename argument, Elk loads from standard input. The option -p load-path can be used to override the standard load-path. The argument is a colon-separated list of directories. If this option is not present and the environment variable ELK_LOADPATH is defined, the value of this variable is used to initialize the load-path. The value of ELK_LOADPATH has the same format as the argument to the -p option. The -h KBytes option is used to specify a non-standard heap size. The default heap size is 512 KBytes. If the option -i is specified, symbols are mapped to lower case. Normally, Elk is case-sensitive. The -g option causes the interpreter to run the garbage collector each time memory is allocated on the heap. This is useful for writers of extensions who want to test the garbage collect behavior of an extension. Running Elk with the -g option is likely to reveal GC-related bugs in extensions (such as not properly protected local objects), as it triggers a garbage collection each time an object is allocated on the Scheme heap. A dot is written to standard output each time a garbage collection is performed when -g has been specified. When called with one or more -v type (``verbose'') options, the interpreter prints additional informational messages to standard output, depending on the value of the type argument. If type is load, the linker command and options are printed each time an object file is loaded; if type is init, the names of extension initialization and finalization functions are printed as they are called. The remaining args are put into a list of strings, and the Scheme variable command-line-args is bound to this list in the global environ- ment. If arguments could be interpreted as options, `--' can be used to indicate the end of the options. FILES
$TMPDIR/ldXXXXXX Temporary files AUTHOR
Oliver Laumann 4th Berkeley Distribution 15 January 1991 ELK(1)