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Operating Systems AIX Permanently set maxdata to maximum Post 302954589 by kprajesh on Wednesday 9th of September 2015 07:46:52 AM
Old 09-09-2015
The amount of memory available on the system varies from 256MB to 4GB. This is because customers using my program has systems with different memory sizes.

1) I have a clarification to understand the AIX mem mgmt behavior. Suppose that I do not set the LDR_CNTRL=maxdata flag in which case my program can use max. of 256MB, right? Now say my program has done malloc/calloc and reached 256MB. If my program again wants more memory using calloc/malloc, what happens? Will it get addtional memory after some memory are swapped to swap space? And if no swap space is available I guess it would cause SEGV.

2) When you said "using shared memory ..." what did you mean?

3) The additional option, is it MALLOCOPTIONS=disclaim? We've tried this but makes the process very slow. Any other option?

Thanks
-KPRajesh
 

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captoinfo(1)						      General Commands Manual						      captoinfo(1)

NAME
captoinfo - convert a termcap description into a terminfo description SYNOPSIS
captoinfo [-vn width] [-V] [-1] [-w width] file . . . DESCRIPTION
captoinfo looks in file for termcap descriptions. For each one found, an equivalent terminfo description is written to standard output. Termcap tc capabilities are translated directly to terminfo use capabilities. If no file is given, then the environment variable TERMCAP is used for the filename or entry. If TERMCAP is a full pathname to a file, only the terminal whose name is specified in the environment variable TERM is extracted from that file. If the environment variable TERM- CAP is not set, then the file /usr/share/terminfo is read. -v print out tracing information on standard error as the program runs. -V print out the version of the program in use on standard error and exit. -1 cause the fields to print out one to a line. Otherwise, the fields will be printed several to a line to a maximum width of 60 charac- ters. -w change the output to width characters. FILES
/usr/share/terminfo Compiled terminal description database. TRANSLATIONS FROM NONSTANDARD CAPABILITIES
Some obsolete nonstandard capabilities will automatically be translated into standard (SVr4/XSI Curses) terminfo capabilities by captoinfo. Whenever one of these automatic translations is done, the program will issue an notification to stderr, inviting the user to check that it has not mistakenly translated a completely unknown and random capability and/or syntax error. XENIX termcap also used to have a set of extension capabilities for forms drawing, designed to take advantage of the IBM PC high-half graphics. They were as follows: If the single-line capabilities occur in an entry, they will automatically be composed into an acsc string. The double-line capabilities and GG are discarded with a warning message. IBM's AIX has a terminfo facility descended from SVr1 terminfo but incompatible with the SVr4 format. The following AIX extensions are automatically translated: Additionally, the AIX box1 capability will be automatically translated to an acsc string. Hewlett-Packard's terminfo library supports two nonstandard terminfo capabilities meml (memory lock) and memu (memory unlock). These will be discarded with a warning message. NOTES
This utility is actually a link to tic(1), running in -I mode. You can use other tic options such as -f and -x. The trace option is not identical to SVr4's. Under SVr4, instead of following the -v with a trace level n, you repeat it n times. SEE ALSO
infocmp(1), ncurses(3NCURSES), terminfo(5) This describes ncurses version 5.7 (patch 20100109). AUTHOR
Eric S. Raymond <esr@snark.thyrsus.com> captoinfo(1)
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