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From: alan@shodha.enet.dec.com ( Alan's Home for Wayward Notes File.)
Newsgroups: comp.unix.ultrix
Subject: Re: Malloc Problems with DECstation 5000/200
Summary: Maxtsiz, maxdsiz, maxssiz and swapfrag.
Keywords: Malloc, RISC, Ultrix 4.1
Message-ID: <2927@shodha.enet.dec.com>
Date: 16 Apr 91 16:09:24 GMT
References: <3853@ssc-bee.ssc-vax.UUCP}
Distribution: usa
Organization: Digital Equipment Corp. - Colorado Springs, CO.
Lines: 42

In article <3853@ssc-bee.ssc-vax.UUCP}, ian@ssc-vax.UUCP (Ian R. Searle) writes:
} Has anybody out there been having malloc problems on a DECstation
} 5000/200? We have 32 Meg of RAM, and 150+ swap, output from
} pstat -s below:
} 
} 157688k swap configured
} 21948k reserved virtual address space
} 	20236k used (4640k text, 0k smem)
} 	137452k free, 1224k wasted, 0k missing
} avail: 4291*32k 140*1k
} 
} We are having troubles getting a single process to malloc more than
} 60 Mbytes, we can get the same program running in separate windows
} to malloc over 120 Mbytes, but a single instance of the program
} cannot seem to grab more than about 60 Mbytes. The simple test
} program listed below can grab 32 Mbytes, 60-70 Mbytes when linked
} with "gcc -o test test.o -lmalloc". BTW when we run this program
} there is plenty of free swap according to pstat -s.

	What is the value of maxdsiz in the configuration?  If
	left to default the data space of a process on a DECstation
	is limited to 64 MB.  You can also check it by using the
	csh(1) limit built-in.

	See the "Guide to System Configuration File Maintainence"
	for rules on changing the value.
} 
} 
} [ Program deleted. ]
} 
} Can anybody point out what in the world I'm doing wrong (no this is
} NOT a trick question).

	It's almost certainly a limit problem.
} 
} Thanks in advance, Ian Searle

	You're welcome.


-- 
Alan Rollow				alan@nabeth.cxn.dec.com