10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I am using ubuntu. I have written a program to calculate prime factors. it works perfectly fine till entered number is less than 9989 (or so ) but when one enters a number higher than that, for example 15000, it does not work. Can anyone guide me whats the problem ? although new codes are welcome,... (2 Replies)
Discussion started by: Abhishek_kumar
2. Red Hat
Hi, I have a Linux distribution ( Oralce Enterprise Linux 5.3 i.e. Redhat ) that I have installed. It works fine when I used 2*512Mb dimms or replace them with a single 1Gb dimm. However when I try to go above 1 Gb the bootup and general performance deteriorates badly. The BIOS picks up the memory... (3 Replies)
Discussion started by: jimthompson
This is my 1st post here. I am facing a rather weired problem. I have a C++ binary running on HP-UX. The output of top as well as glance shows periodic increase in memory. But when i use gdb to detect it, i dont get the desired output...gdb says...no leaks found. Just to mention that I have... (2 Replies)
Discussion started by: kshk123
Can any one plz explain me about memory leak problem
Thankx (5 Replies)
Discussion started by: sonali
I have a program that will fetch some particular lines and store it in a buffer for further operations.The code which is given below works but with some errors.I couldn't trace out the error.Can anybody help on this plz??
#define... (1 Reply)
Discussion started by: vigneshinbox
6. Shell Programming and Scripting
how the data from disk is loaded into memory and then it supplied to tcp/ip packet.
how i can trace the no of pages loaded in memory by that process and rate of context switch for that process. (1 Reply)
Discussion started by: amar20
i am building open source software on a solaris 8 machine
for couple of days i am getting error messages like
out of memory
no more processes and then build is failing
i tried with rebooting the machine but then after couple of days same problem is arising again.
can any one... (1 Reply)
Discussion started by: mobydick
Hi, I try to marshal a unsigned int and a char * into a buffer, and then unmarshal them later to get them out. I need to put the char * in the front and unsigned int at the end of the buffer. However, my system always give me "BUS ERROR". I am using Sun Sparcs Sloris 2.10.
My code to marshal... (6 Replies)
Discussion started by: nj302
9. Filesystems, Disks and Memory
One of java programs in our machine allocates 256M of heap memory and max of 512 memory(Tomcat to be specific).
Our ulimit per process is 32M.How can a process allocates such a big amount of memory
ps v output is
PGIN SIZE RSS LIM TSIZ TRS %CPU %MEM COMMAND
24 220776 220892... (0 Replies)
Discussion started by: ganti
I have a server with a very little memory leak (29 bytes) as reported by Purify.
Itīs a pooled server, so each process lives forever accepting conections.But top or ps commands show that used memory it is always increasing much more than 29 bytes (30K mor or less) in each conection.
How... (0 Replies)
Discussion started by: Pablo J. Royo
MALLOC_TRIM(3) Linux Programmer's Manual MALLOC_TRIM(3)
malloc_trim - release free memory from the top of the heap
void malloc_trim(size_t pad);
The malloc_trim() function attempts to release free memory at the top of the heap (by calling sbrk(2) with a suitable argument).
The pad argument specifies the amount of free space to leave untrimmed at the top of the heap. If this argument is 0, only the minimum
amount of memory is maintained at the top of the heap (i.e., one page or less). A nonzero argument can be used to maintain some trailing
space at the top of the heap in order to allow future allocations to be made without having to extend the heap with sbrk(2).
The malloc_trim() function returns 1 if memory was actually released back to the system, or 0 if it was not possible to release any memory.
No errors are defined.
This function is a GNU extension.
This function is automatically called by free(3) in certain circumstances; see the discussion of M_TOP_PAD and M_TRIM_THRESHOLD in mal-
This function cannot release free memory located at places other than the top of the heap.
This function only releases memory in the main arena.
sbrk(2), malloc(3), mallopt(3)
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2012-03-29 MALLOC_TRIM(3)