今日寫代碼。出現一個OOM問題:
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Unknown Source)
at java.lang.Class.getDeclaredField(Unknown Source)
at dao.BaseDao.excuteQuery(BaseDao.java:60)
at dao.MsabnormalChangeaddress4Dao.queryAll(MsabnormalChangeaddress4Dao.java:14)
at test.Test.main(Test.java:24)
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做業務查詢,JDBC,通用JDBC。該表大概有473009行,我是做其中的一條數據查詢。結果爆出了OOM, 如何調優?