I think this will help in understanding the logs.

On Wed, Jun 11, 2014 at 12:53 PM, nilmish <> wrote:

I used these commands to show the GC timings : -verbose:gc
-XX:-PrintGCDetails -XX:+PrintGCTimeStamps

Following is the output I got on the standard output :

4.092: [GC 4.092: [ParNew: 274752K->27199K(309056K), 0.0421460 secs]
274752K->27199K(995776K), 0.0422720 secs] [Times: user=0.33 sys=0.11,
real=0.04 secs]

16.630: [GC 16.630: [ParNew: 301951K->17854K(309056K), 0.0686940 secs]
301951K->23624K(995776K), 0.0689110 secs] [Times: user=0.36 sys=0.05,
real=0.07 secs]

32.440: [GC 32.441: [ParNew: 292606K->14985K(309056K), 0.0206040 secs]
298376K->20755K(995776K), 0.0208320 secs] [Times: user=0.20 sys=0.00,
real=0.02 secs]

42.626: [GC 42.626: [ParNew: 289737K->15467K(309056K), 0.0138100 secs]
295507K->21237K(995776K), 0.0139830 secs] [Times: user=0.10 sys=0.00,
real=0.01 secs]

56.633: [GC 56.633: [ParNew: 290219K->17334K(309056K), 0.0170930 secs]
295989K->23105K(995776K), 0.0173130 secs] [Times: user=0.12 sys=0.01,
real=0.02 secs]

Can anyone help me to understand these messgaes related to GC ?

View this message in context:
Sent from the Apache Spark User List mailing list archive at