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ReservedCodeCacheSize最大值问题 #896

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yiiqian opened this issue Dec 3, 2024 · 3 comments
Open

ReservedCodeCacheSize最大值问题 #896

yiiqian opened this issue Dec 3, 2024 · 3 comments

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@yiiqian
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yiiqian commented Dec 3, 2024

ReservedCodeCacheSize目前最大是设置成2G。翻开源码
截屏2024-12-03 16 10 33
是由CODE_CACHE_SIZE_LIMIT决定的。这里可以修改成4G吗，设置成2G是出于对32位系统的兼容性吗
@kuaiwei
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kuaiwei commented Dec 5, 2024

有具体的应用需要超过2g的code cache吗？

@yiiqian
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yiiqian commented Dec 5, 2024 •
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有具体的应用需要超过2g的code cache吗？

服务在执行热切换的时候，老服务会在新服务启动时JIT阶段出现卡顿。
改完上限，ReservedCodeCacheSize超过2G会crash

@kuaiwei
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kuaiwei commented Dec 6, 2024

热切换是指redefine了class? 理论上旧的nmethod会被释放的，你们应用是什么类型的？

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@kuaiwei @yiiqian