Dm_ifw_sync Startup Fails With Error "Bad Mmap(2) Errno: 12"
(Doc ID 1601869.1)
Last updated on FEBRUARY 03, 2019
Applies to:Oracle Communications Billing and Revenue Management - Version 188.8.131.52.0 to 184.108.40.206.0 [Release 7.2.0 to 7.5.0]
Information in this document applies to any platform.
Some concerns about the shared memory errors while starting DM are addressed here.
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In this Document
|Questions and Answers|
|Qn1: On BRM 220.127.116.11.0 version, dm_ifw_sync fails to start with error "bad mmap(2) errno: 12 "|
|Qn4: Since all processes are sharing the global shared memory region, is it possible to know the maximum contiguous memory segment possible at any moment. Or do we have any utilities to tackle the fragmentation?|
|Qn5: In regards to the performance, our understanding is that bill run will take less time, when the shared memory chunk allocated is huge. Is it not the case ?|
|Qn6 : We see a discrepancy in the error printed in dm log file while starting.|
|Qn7: We have used 107MB per DM. With 10 DM_ORACLE processes and 1 DM_IFW_SYNC process, the total will come as 1234173952 bytes. But this was not matching with the ipcs -ma output.|
|Qn9: If high water mark (HWM) error comes for DM, that is, the heap is used up, and following that if 100% is used up, then will the DM process die? If so what is the impact on the bill run?|
|Qn10: Below is the DM log information for one of the DM process after sending USR1 signal. Does it show that we have enough heap ?|