Excessive memory utilization when ingesting files into Timeline

[rbuch]

Original issue: https://charm.cs.illinois.edu/redmine/issues/1230

---

When loading files into Timeline (and later), there's a lot of memory usage. For some logs, e.g. prudence:/scratch/nitin/charity_proj_logs/1, the memory usage is high enough that they take unreasonably long to load. This can probably be made more efficient.

[nitbhat]

Original date: 2016-11-06 14:32:24

---

These logs which take really long to load and on loading become unresponsive are from a single core ChaNGa run (SMP mode) with -tracemode projections. The application takes about 250 seconds for the entire run. Log file size is about 110 MB. I tried opening the logs on prudence with increased memory too. (Explicitly increased memory to 48G in the projections script). This didn't help in loading the log files.