[英]Is there any logs I can enable for spring-data-jpa to see why it is slow in Tomcat?
I have a query which runs in about 6ms in DBeaver and I used the general log to extract the query that is being passed in which is the same database that my Tomcat server is connected to我有一个在 DBeaver 中运行大约 6 毫秒的查询,我使用通用日志提取正在传递的查询,该查询与我的 Tomcat 服务器连接到的数据库相同
select min(organizati0_.Downloaded) as col_0_0_ from oss_collection_history organizati0_
where organizati0_.AccountingSystem='SomeSystem'
and (organizati0_.Org in ('ID1' , 'ID2', ..., 'ID10' ))
On a JUnit test running Spring Data JPA against a Dockerized copy of the database, the query also runs quite fast 60ms, but on Tomcat it takes upwards of 8-10 seconds.在针对数据库的 Dockerized 副本运行 Spring 数据 JPA 的 JUnit 测试中,查询也运行得非常快 60 毫秒,但在 Tomcat 上它需要 8-10 秒以上。
So not exactly sure what's going on.所以不确定发生了什么。
I just do this to profile the function call using the same parameters.我这样做只是为了使用相同的参数分析 function 调用。
var start = System.currentTimeMillis();
consolidatedDownloadSvc.getAvailableYearsOfDownloadedForAccountingSystem(...);
System.out.println(System.currentTimeMillis() - start);
It does not appear on slowlog even if I set global log_queries_not_using_indexes = 'ON';
即使我
set global log_queries_not_using_indexes = 'ON';
so that would indicate to me that the query is indexed.这样就可以向我表明查询已编入索引。
So I was wondering if there's some sort of log that will show me any extra things I may be missing in Spring-Data and Hibernate.所以我想知道是否有某种日志可以显示我在 Spring-Data 和 Hibernate 中可能丢失的任何额外内容。
You can use the following set of properties in your application.properties
file.您可以在
application.properties
文件中使用以下属性集。 If you don't have a specific logger policy those will be pushed to your tomcat catalina.log
file如果您没有特定的记录器策略,它们将被推送到您的 tomcat
catalina.log
文件
spring.jpa.properties.hibernate.show_sql=true
spring.jpa.properties.hibernate.use_sql_comments=true
spring.jpa.properties.hibernate.format_sql=true
spring.jpa.properties.hibernate.type=trace
Apart from what @Panagiotis suggested it will also be helpful to enable below stats to understand in what phase is hibernate spending more time.除了@Panagiotis 建议的内容之外,启用以下统计信息也有助于了解 hibernate 在哪个阶段花费更多时间。
spring.jpa.properties.hibernate.generate_statistics=true
logging.level.org.hibernate.stat=DEBUG
You would see something like below in your logs您会在日志中看到类似下面的内容
2021-12-29 10:54:52.408 INFO 31972 - – [ main] i.StatisticalLoggingSessionEventListener : Session Metrics {
5070899 nanoseconds spent acquiring 1 JDBC connections;
0 nanoseconds spent releasing 0 JDBC connections;
4359903 nanoseconds spent preparing 20 JDBC statements;
76117198 nanoseconds spent executing 20 JDBC statements;
0 nanoseconds spent executing 0 JDBC batches;
132026893 nanoseconds spent performing 40 L2C puts;
0 nanoseconds spent performing 0 L2C hits;
838900 nanoseconds spent performing 19 L2C misses;
0 nanoseconds spent executing 0 flushes (flushing a total of 0 entities and 0 collections);
16900 nanoseconds spent executing 1 partial-flushes (flushing a total of 0 entities and 0 collections)
}
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