March 2005
Beginner to intermediate
1254 pages
104h 21m
English
Content preview from Java in a Nutshell, 5th EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Name
jstat — Java VM statistics
Synopsis
jstat [options]pid[interval[s|ms] [count]] jstat [options]pid@hostname[:port] [interval[s|ms] [count]]
Description
jstat probes a running
JVM
once or repeatedly and displays
statistics about its class loading,
just-in-time compilation, memory, or garbage collection performance.
The type of information to be displayed is specified by
options. A local process to be probed is
specified by its process id, as returned, for example, by
jps. A remote Java process may be probed by
specifying the remote process id, the remote host name, and the port
number on which the remote host’s
rmiregistry server is running (if other than the
default of 1099). The remote host must also be running the
jstatd server.
By default, jstat probes the specified Java VM once. You may also specify a probe interval, in milliseconds or seconds, to have it probe repeatedly. If you do this, you may additionally specify a total number of probes it should conduct.
jconsole can report many of the same statistics that jstat does but displays them in graphical rather than tabular form. In Java 5.0, jinfo is experimental, unsupported, and not available on all platforms.
Options
-
-help Displays a help message.
-
-options Displays a list of report types that jstat can display. You must use one of the listed options each time you run jstat.
-
-version Displays the jstat version information and exits.
-
-hn When jstat probes the Java process repeatedly, this option specifies ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.