Hung,
Dejava.lang.OutOfMemoryError: nativeGetNewTLAadlocked, or Looping
Process
Print
thread stack for all Java threads:
Control-\
kill
-QUIT pid
jstack pid (or jstack
-F pid if jstack pid does
not respond)
Detect
deadlocks:
Request
deadlock detection: JConsole tool, Threads tab
Print
information on deadlocked threads: Control-\
Print
list of concurrent locks...
Thursday, January 31, 2013
Tuesday, January 29, 2013
Tunable Linux Kernel Parameters
Parameters
that can be used in dealing with Shared
memory Segments
localHost:Root-~
$ ipcs -lm
------
Shared Memory Limits --------
max
number of segments = 4096
max
seg size (kbytes) = 67108864
max
total shared memory (kbytes) = 17179869184
min
seg size (bytes) = 1
SHMMAX
is used to define the maximum size (in bytes) for a shared memory
segment. the larger it is, the better Caché performance will be.
To
get...
Wednesday, January 16, 2013
Flush Memory
Flush Memory
[root@vx111a
~]# free -m
total used free shared buffers cached
Mem: 3031 1811 1220 0 201 1266
-/+
buffers/cache: 343...
Thursday, January 10, 2013
Why Tomcat 7?
Apache Released a New version of Tomcat 7.There is a need for the migration of
Applications which are running in Tomcat 6 to Tomcat 7.In this article we will
see the advantages of Tomcat 7 and its Features.
1. Tomcat
7 Requires Java SE 6 Further Versions.
2. Tomcat
7 Includes Servlet 3.0 API.
3. Tomcat
7 Includes Expression language 2.2 (mechanism...
Tuesday, January 8, 2013
Trace Route
Trace route is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network.
How to use
[root@localhost ~]$ traceroute google.com
traceroute: Warning: google.com has multiple addresses; using 74.125.225.99
traceroute to google.com (74.125.225.99), 30 hops max, 46 byte packets
1 RRSE0C7.c6500l.omhq.uprr.com (167.132.86.126)...
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