bash 中的垃圾收集
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Garbage collection in bash
提问by sashang
Does bash run a garbage collector? Can it be controlled via some command line options? I can't find anything on the net about this.
bash 是否运行垃圾收集器？可以通过一些命令行选项来控制吗？我在网上找不到任何关于此的信息。
I have a bash script that runs and over a few days its memory usage increases. I want to know where the memory is going.
我有一个运行的 bash 脚本，几天后它的内存使用量增加了。我想知道记忆的去向。
采纳答案by that other guy
Bash does not run a garbage collector as such. Since it has no concept of references, there is no need to find data without references. It does free memory no longer in use, though.
Bash 本身并没有运行垃圾收集器。由于它没有引用的概念，所以没有引用就不需要查找数据。不过，它确实释放了不再使用的内存。
Here's a simple demonstration of memory usage before and after declaring and overwriting a large variable. Memory usage goes up then down again:
这是声明和覆盖大变量之前和之后的内存使用情况的简单演示。内存使用量上升然后再次下降：
ps -o rss -p $$
var=$(printf "%s\n" {1..100000})
ps -o rss -p $$
var="smallstring"
ps -o rss -p $$
