elasticsearch
resource_error
ai_generated
partial
Elasticsearch异常：[脚本缓存] 驱逐触发，当前堆使用率[92%]，最大缓存大小[10000]
ElasticsearchException: [script_cache] eviction triggered, current heap usage [92%], max cache size [10000]
ID: elasticsearch/script-cache-eviction-memory-pressure
75%修复率
82%置信度
1证据数
2024-06-10首次发现
版本兼容性
| 版本 | 状态 | 引入 | 弃用 | 备注 |
|---|---|---|---|---|
| 7.17.14 | active | — | — | — |
| 8.11.0 | active | — | — | — |
| 8.14.0 | active | — | — | — |
根因分析
脚本缓存已满且堆内存使用率很高，导致Elasticsearch驱逐已编译的脚本以释放内存，从而降低性能。
English
The script cache is full and heap memory usage is high, causing Elasticsearch to evict compiled scripts to free memory, which degrades performance.
官方文档
https://www.elastic.co/guide/en/elasticsearch/reference/current/circuit-breaker.html#script-compilation-circuit-breaker解决方案
-
在elasticsearch.yml中增加脚本缓存大小：script.cache.max_size: 20000并重启节点，或使用动态设置：PUT _cluster/settings { "transient": { "script.cache.max_size": "20000" } } -
通过参数化内联脚本减少脚本种类：使用存储脚本或参数代替每次查询生成唯一脚本源，例如 { "script": { "id": "my_script", "params": { "factor": 2 } } }
无效尝试
常见但无效的做法:
-
60% 失败
Larger heap may delay eviction but does not fix the root cause of too many unique scripts being compiled; cache still fills up
-
90% 失败
Disabling the cache forces recompilation on every script execution, causing severe performance degradation and potential OOM