To check the amount of heap and stack memory allocated for a specific process in a UNIX environment, you can use the pmap
command followed by the process ID (PID). For example, you can run pmap -x <PID>
to display detailed memory usage, including heap and stack. Additionally, you can use the top
or htop
command to monitor the overall memory usage of processes in real-time. For more specific stack information, you might also consider examining /proc/<PID>/maps
for memory segment details.
You can use the DOS command MEM to show total and available memory, but it only shows the memory for the process that is running the command shell. It will not show the memory in terms of Windows, nor will it work at all for Windows 7.
if a variable is of value type memory is allocated on stack memory.. if it is of reference type,memory is allocated on heap memory..
This cannot be done at compile time because the memory allocated to a process is subject to change.
Contiguous memory address are allocated to an array or vector.
use free() how does the system know what range of memory it has allocated use free() how does the system know what range of memory it has allocated
The maximum memory that can be dynamically allocated depends on the size of the heap memory. Dynamic blocks of memory can be allocated in system heap until it is not full.
Memory page.
Main Memory (RAM).
Memory is allocated by malloc from the heap.... so max mem = size of heap that is free...
No! Instance methods are allocated memory at first time only.
No. Static memory is allocated at compile time. Static variables are allocated within the program's data segment which is a physical part of the executable. When you load the executable into memory, the operating system sets aside enough memory for the entire executable and copies it, byte for byte, into that memory. So when the program is executed, the data segment is already allocated.
As a memory pool is allocated from, over time the pool will become fragmented. Some objects from the pool will be allocated surrounded by objects that are not, in seemingly random order. Memory compaction is the process of moving allocated objects together, and leaving empty space together. Consider a system with 3 pages and about 50% of their objects are allocated. By compacting all the living objects into the first two pages, leaving the third page completely empty. This empty page can then be ignored during future mark/sweep phases since it is known to be empty of living objects, or it can be released and returned to the operating system.