Dear All,
We are currently facing a very weird and non-understandable performance problem.
We have Cluster CI + DB ( Linux , Oracle 11.2.0.2) + 10 Application instances. Our Target SLA for dialog response time is around 700ms, earlier before 2 weeks response time was normal and suddenly response time at 21:00 is shooting very high, nearly 3 times of that between day time( morning 8am-9pm). Its actually not understandable what is happening in system at 21:00 , we noticed/observed below till now -
1) backup run at 21:00 , we postpone backup to 23:00 ( still response was very high between 21:00 - 23:00 )
2) Redolog backup happens at 22:00 - postpone the same to 24:00 ( still response was very high between 21:00 - 23:00 )
3) We have not noticed huge number of IDOCS passed during respective time ( 4000-5000)
4) We collected trace for multiple transactions but not much help. Is there any other way to check load by idocs?
We observed that Database response time increases and causing dialog response time increased too.
As we observed we noticed Task type "BUFFER SYNC" is also increased during respective period.
if DB response time considered for Dialog steps , we observed huge difference but we didnt understand why suddenly after 21:00 to 04:00 its shooting so high. We will appreciate if any ways to check and reduce this dialog response/db response time.
We will appreciate if any further ways to investigate on this.
We have also raised this to SAP but not yet any good suggestion.
To give a whole day scenario about how response time flows - can claerly see between 21:00 - 03:00 response time is getting very high.
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Regards,