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22 lines
727 B
Markdown
22 lines
727 B
Markdown
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# Bash `HISTFILESIZE` の限界
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```console
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$ seq 0 $((0x7fffffff)) > .bash_history
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$ wc -l .bash_history
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2147483648 .bash_history
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$ echo $((0x7fffffff))
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2147483647
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$ docker compose run --rm bash
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root@ff1161946537:/# 225859065
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$ wc -l .bash_history
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16777215 .bash_history
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```
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- 225859066 行 (< 0x7fffffff bytes) まで読み込まれた
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- `HISTFILESIZE=$((0x7fffffff))` 以上にするのは意味がない
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- `HISTFILESIZE=$((0x7fffff))` 行に切り落とせる
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- `HISTFILESIZE=$((0xffffff))` 行に切り落とせる
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- `HISTFILESIZE=$((0x7fffffff))` では .bash_history が大きいとハングすることがあった
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- このあたりが限界だろう
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- 0xffffff 行くらいまでならおそらく OK だろう
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