Java（Solr）线程转储有多贵？
[英]How expensive are Java (Solr) thread dumps?
问题描述
As part of some ongoing maintenance, we have been taking regular thread dumps for all threads in the JVM at a one minute interval. 
作为一些持续维护的一部分，我们一直在为JVM中的所有线程定期进行线程转储。 (Eg curl http://localhost:8983/solr/admin/threaddump.jsp ) （例如curl http://localhost:8983/solr/admin/threaddump.jsp ）
What are the performance / other negative impacts of continuing this practice indefinitely? 无限期地继续这种做法有什么表现/其他负面影响？
1 个解决方案
解决方案1
1 已采纳 2011-10-28 11:07:55
Generally, JVM thread dumps are cheap, low impacting, regardless of the applications. 通常，无论应用程序如何，JVM线程转储都很便宜，影响很小。 Jmap -histos on the other hand, can be very performance impacting. 另一方面，Jmap -histos可能会对性能产生很大的影响。 I work in maintance, we do a lot of thread dumps, never seen a direct crash caused by thread dumping. 我在maintance工作，我们做了很多线程转储，从未见过线程转储导致的直接崩溃。
The only problem with running dumps once a minute is too much information. 每分钟运行一次转储的唯一问题是信息太多。
Are you appending the dump to a separate file? 您是否将转储附加到单独的文件？ In my experience you have to look at dumps over time to catch things like transient lock contention. 根据我的经验，您必须随着时间的推移查看转储以捕获瞬态锁争用等问题。
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