How do I configure kexec kdump on RHEL?

How do I configure kexec kdump on RHEL?

How to enable Kdump on RHEL 7 and CentOS 7

1. Step:1 Install ‘kexec-tools’ using yum command.
2. Step:2 Update the GRUB2 file to Reserve Memory for Kdump kernel.
3. Step:3.
4. Step:4 Start and enable kdump service.
5. Step:5 Now Test Kdump by manually crashing the system.
6. Step:6 Use ‘crash’ command to analyze and debug crash dumps.

How does Linux kdump work?

kdump is a feature of the Linux kernel that creates crash dumps in the event of a kernel crash. When triggered, kdump exports a memory image (also known as vmcore) that can be analyzed for the purposes of debugging and determining the cause of a crash.

How do I know if kdump is configured?

CentOS / RHEL 5 : How to Configure kdump

1. Install the kexec-tools.
2. Check the file /boot/config-`uname -r`
3. Modify the system kernel to reserve space for the crash kernel.
4. Specify where the vmcore should be created.
5. Update kdump configuration file – /etc/sysconfig/kdump (optional)
6. Enable the kdump service.

What is kdump and configure?

How does Linux Kdump work?

How do you analyze a memory dump file?

Analyzing Dump Files

1. Click Search in the Taskbar and type WinDbg,
2. Right-click WinDbg and select Run as administrator.
3. Click the File menu.
4. Click Start debugging.
5. Click Open Dump file.
6. Select the Dump file from the folder location – for example, %SystemRoot%\Minidump.
7. Click Open.

How do you analyze a heap dump?

We will first start the Memory Analyzer Tool and open the heap dump file. In Eclipse MAT, two types of object sizes are reported: Shallow heap size: The shallow heap of an object is its size in the memory. Retained heap size: Retained heap is the amount of memory that will be freed when an object is garbage collected.

How do I configure ProcDump?

1. Download ProcDump from Windows Sysinternals site.
2. Run “cmd” as administrator (Press Windows key to open the start menu.
3. Change current directory to the folder with procdump.exe.
4. Register procdump as the AeDebug postmortem debugger:

How do I set up ProcDump?

How do I use ProcDump to gather a process dump?

1. Click on Download ProcDump and save Procdump.zip to a folder.
2. Extract contents of Procdump.
3. Open a CMD window as an administrator and input the below command:
4. Hit the Enter key.
5. Enter the following command:
6. Hit the Enter key.
7. Click Agree on the ProcDump License Agreement.