Issues when Insert and Analyze at the same time

Hi All,
We have a weekend job that used to take 12-15 hours usually and insert around 8 millions of records to a table from external table. Last weekend the same load took 60 hours and it move to Monday and there are some business impact.
While we investigate the same issue we identified that there is one more weekend analyze job for all the tables and indexes and took around almost same time and we noticed that the table we inserted the 8 million records alone it took around 15 hours. This table now has around 91 Core records.
We need to identify why this jobs taken long time as almost 4 times compare to the normal scenario.
I would like to know what exactly happen when Analyze and insert happened to the table at the same time. And What all issues can occur because this.
Best Regards,
Shijo

Ok,
It is unclear what version you are using as you forgot to post that.
Furthermore it is unclear what 'Analyze' is, as analyze statistics was already deprecated in 9i.
Secondly, most people is this forum speak English, and they are accustomed international units only.
Sybrand Bakker
Senior Oracle DBA

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