ps (version 1.3.2)

ps_memory_info: Memory usage information

Description

A list with information about memory usage. Portable fields:

• rss: "Resident Set Size", this is the non-swapped physical memory a process has used. On UNIX it matches "top"<U+2018>s 'RES' column (see doc). On Windows this is an alias for wset field and it matches "Memory" column of taskmgr.exe.

• vmem: "Virtual Memory Size", this is the total amount of virtual memory used by the process. On UNIX it matches "top"<U+2018>s 'VIRT' column (see doc). On Windows this is an alias for the pagefile field and it matches the "Working set (memory)" column of taskmgr.exe.

Usage

ps_memory_info(p)

Arguments

p

Process handle.

Value

Named real vector.

Details

Non-portable fields:

• shared: (Linux) memory that could be potentially shared with other processes. This matches "top"<U+2018>s 'SHR' column (see doc).

• text: (Linux): aka 'TRS' (text resident set) the amount of memory devoted to executable code. This matches "top"<U+2018>s 'CODE' column (see doc).

• data: (Linux): aka 'DRS' (data resident set) the amount of physical memory devoted to other than executable code. It matches "top"<U+2018>s 'DATA' column (see doc).

• lib: (Linux): the memory used by shared libraries.

• dirty: (Linux): the number of dirty pages.

• pfaults: (macOS): number of page faults.

• pageins: (macOS): number of actual pageins.

For on explanation of Windows fields see the PROCESS_MEMORY_COUNTERS_EX structure.

Throws a zombie_process() error for zombie processes.

See Also

Other process handle functions: ps_children(), ps_cmdline(), ps_connections(), ps_cpu_times(), ps_create_time(), ps_cwd(), ps_environ(), ps_exe(), ps_handle(), ps_interrupt(), ps_is_running(), ps_kill(), ps_name(), ps_num_fds(), ps_num_threads(), ps_open_files(), ps_pid(), ps_ppid(), ps_resume(), ps_send_signal(), ps_status(), ps_suspend(), ps_terminal(), ps_terminate(), ps_uids(), ps_username()

Examples

# NOT RUN {
p <- ps_handle()
p
ps_memory_info(p)
# }