dongjoon-hyun commented on pull request #35613:
URL: https://github.com/apache/spark/pull/35613#issuecomment-1048096616
With Java 11, the scale is similar.
```
$ java -version
openjdk version "11.0.10" 2021-01-19
OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.10+9)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 11.0.10+9, mixed mode)
$ while true; do echo \"$(date +%Y-%m-%d' '%H:%M:%S)\",$(pmap -x 1427761 |
grep "total kB" | awk '{print $4}'); sleep 10; done;
"2022-02-22 10:32:10",848284
"2022-02-22 10:32:20",901100
"2022-02-22 10:32:30",1005732
"2022-02-22 10:32:40",1039640
"2022-02-22 10:32:50",1079424
"2022-02-22 10:33:00",1084296
"2022-02-22 10:33:10",1084360
"2022-02-22 10:33:20",1590012
"2022-02-22 10:33:30",1659336
"2022-02-22 10:33:40",1819064
"2022-02-22 10:33:50",1899304
"2022-02-22 10:34:00",1985772
"2022-02-22 10:34:10",2034652
"2022-02-22 10:34:20",2037392
```
To be clear, this patch shows the improvement (2037392 -> 1739112), of
course.
```
$ while true; do echo \"$(date +%Y-%m-%d' '%H:%M:%S)\",$(pmap -x 1404956 |
grep "total kB" | awk '{print $4}'); sleep 10; done;
"2022-02-22 10:21:42",823772
"2022-02-22 10:21:52",844600
"2022-02-22 10:22:02",986640
"2022-02-22 10:22:12",1019404
"2022-02-22 10:22:22",1052240
"2022-02-22 10:22:32",1061876
"2022-02-22 10:22:42",1063884
"2022-02-22 10:22:52",1584192
"2022-02-22 10:23:02",1625884
"2022-02-22 10:23:12",1681960
"2022-02-22 10:23:22",1699980
"2022-02-22 10:23:32",1740428
"2022-02-22 10:23:43",1738484
"2022-02-22 10:23:53",1739112
```
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