$ java -Xmx64m -Xlog:gc StreamLines reader big.log
Files.newBufferedReader over big.log (5,000,000,069 bytes)
lines=34,120,522 errors=681,844 services=20
elapsed 9.3 s
heap: -Xmx=64 MiB, peak used (sampled every 20 ms)=38 MiB, GC collections=222, GC time=212 ms
GC log: 223 lines, 222 young pauses, 0 full GCs
first lines of the GC log:
[0.005s][info][gc] Using G1
[0.273s][info][gc] GC(0) Pause Young (Normal) (G1 Evacuation Pause) 15M->1M(64M) 2.473ms
[0.349s][info][gc] GC(1) Pause Young (Normal) (G1 Evacuation Pause) 28M->1M(64M) 1.211ms
[0.401s][info][gc] GC(2) Pause Young (Normal) (G1 Evacuation Pause) 38M->1M(64M) 1.173ms
last lines of the GC log:
[9.286s][info][gc] GC(219) Pause Young (Normal) (G1 Evacuation Pause) 38M->1M(64M) 0.515ms
[9.319s][info][gc] GC(220) Pause Young (Normal) (G1 Evacuation Pause) 38M->1M(64M) 0.427ms
[9.353s][info][gc] GC(221) Pause Young (Normal) (G1 Evacuation Pause) 38M->1M(64M) 0.469ms
largest 'Pause Young' (ms): 6.615
highest heap-after-GC seen in the log: 1M of 64M