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报表页面加载打开非常慢

 

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服务部署在内网，报表页面打开非常慢，要 20 秒，但是观察单次调用链路的日志，发现日志全部发生在最后的一秒内，也就是说在前期页面打转这段时间，没有任何日志，报表系统在做什么？为什么慢？
[2023-10-27 08:24:03]
INFO: 生成 HTML 结束……

[2023-10-27 08:24:15]
INFO: 现在计算报表 demo.rpx

[2023-10-27 08:24:15]
DEBUG: CacheManager get report entry

[2023-10-27 08:24:15]
DEBUG: Start reading report entry, Report entry ID: demo.rpx

[2023-10-27 08:24:15]
DEBUG: End reading report entry, Report entry ID: demo.rpx

[2023-10-27 08:24:15]
DEBUG: Start reading report entry, Report entry ID: demo.rpx

[2023-10-27 08:24:15]
DEBUG: End reading report entry, Report entry ID: demo.rpx

[2023-10-27 08:24:15]
INFO: Calculation start,first get data from source……

[2023-10-27 08:24:15]
INFO: print sql:

[2023-10-27 08:24:15]
INFO: ds1=SELECT ******* WHERE ****** = ?;

[2023-10-27 08:24:15]
INFO: arg0: 1

[2023-10-27 08:24:15]
INFO: Calculating report…

[2023-10-27 08:24:15]
INFO: Report Pictures Processing……

[2023-10-27 08:24:15]
INFO: Calculation complete!

[2023-10-27 08:24:15]
DEBUG: Start writing report cache, Report entry ID: demo.rpx Report cache ID: A_44020684916

[2023-10-27 08:24:15]
DEBUG: Start writing pager cache, Report entry ID: demo.rpx Report cache ID: A_44020684916 Pager cache ID: A_44020750480

[2023-10-27 08:24:15]
DEBUG: pdfUrl http://***********:9999/demo/reportServlet?action=6&file=demo.rpx&columns=0&srcType=file&cachedId=A_44020684916&reportParamsId=100030&t_i_m_e=1698395055818

[2023-10-27 08:24:15]
INFO: 开始生成 HTML……

[2023-10-27 08:24:15]
DEBUG: End writing report cache, Report entry ID: demo.rpx Report cache ID: A_44020684916. time：3ms

[2023-10-27 08:24:15]
DEBUG: End writing pager cache, Report entry ID: demo.rpx Report cache ID: A_44020684916 Pager cache ID: A_44020750480. time：5ms

[2023-10-27 08:24:15]
INFO: 生成 HTML 结束……