What is DTrace in Linux?

DTrace is a comprehensive, advanced tracing tool for troubleshooting systematic problems in real time. DTrace allows you to explore your system to understand how it works, track down problems across many layers of software, and locate the cause of any aberrant behavior. …

How do I run DTrace?

Command Line

1. Log onto the EV Server as the Vault Service Account.
2. Open a Command Prompt window.
3. Navigate to the EV program folder (typically C:\Program Files (x86)\Enterprise Vault)
4. Type dtrace and press Enter.
5. At the Dtrace prompt (DT>) type View and press Enter.

What is DTrace in MySQL?

The DTrace probes in the MySQL server are designed to provide information about the execution of queries within MySQL and the different areas of the system being utilized during that process.

How do I use DTrace on Windows?

1. BCD configuration set: bcdedit /set dtrace on.
2. Download and install the DTrace package from download center.
3. Optional: Update the PATH environment variable to include C:\Program Files\DTrace.
4. Optional: Setup Kernel debugger connection to the target machine (MSDN link).
5. Reboot target machine.

Which facility dynamically adds probes to a running system?

Explanation: A facility that dynamically adds probes to a running system, both in user process and in the kernel is called DTrace.

What is Kprobe?

KProbes is a debugging mechanism for the Linux kernel which can also be used for monitoring events inside a production system. You can use it to weed out performance bottlenecks, log specific events, trace problems etc.

What can you do with BPF?

BPF supports filtering packets, allowing a userspace process to supply a filter program that specifies which packets it wants to receive. For example, a tcpdump process may want to receive only packets that initiate a TCP connection. BPF returns only packets that pass the filter that the process supplies.

How do I trace a MySQL query?

How to show the queries log in MySQL?

1. Enable Query logging on the database. SET global general_log = 1; SET global log_output = ‘table’;
2. Now you can view the log by running this query: SELECT * FROM mysql. general_log;
3. If you want to disable query logging on the database, run this query: SET global general_log = 0;

Where can I get DTrace for Oracle Linux?

The DTrace dtrace-utils package is available from ULN. Your system must be registered with ULN and be installed with or be updated to Oracle Linux 6 Update 4 or later. To install and configure DTrace, perform the following steps:

What do you need to know about DTrace?

DTrace is a comprehensive, advanced tracing tool for troubleshooting systematic problems in real time.

What can DTrace be used for in Solaris?

DTrace is a comprehensive dynamic tracing facility that is built into Oracle Solaris and can be used by administrators and developers on live production systems to examine the behavior of both user programs and the operating system itself.

How to use DTrace to troubleshoot Java Native memory problems on Oracle?

This lab will introduce the basic concepts of DTrace and provide exercises for using DTrace to identify common Java native memory problems, such as direct buffer overflow, Inflater/Deflater memory leak, and thread stack overflow. DTrace is a comprehensive dynamic tracing framework for the Oracle Solaris operating system.