2144746 - SAP does not start due to memory pool 40 exceeded

1. You attempt to start an SAP instance however the instance does not start and the below entries are written in the dev_disp trace file from the dispatcher.
   
   *** ERROR => Illegal ShmAdm Slot. Key=495215104. [shmux.c 645]
   ShmGet( 495215104, 40, 0, 2, 0xfffffd7fffdfeca8 )
   *** ERROR => ShmGet: Inv PoolKey=495215104, Key=40, Flag=2, Ptr=fffffd7fffdfeca8. [shmux.c 1952]
   *** ERROR => ShmCleanup: ShmCreate(40,0,SHM_ATTACH,...) failed. rtc=2 [shmux.c 3087]
   
   
2. In the output of the command "sappfpar check pf=<path to the instance profile>" you can see memory pool 40 is exceeding its size limit.
   
   ***ERROR: Maximum shared memory segment size exceeded
   ================================================================
   Shared memory pools exceeding size limit
   Key:       40  Size:  102584000000 (97831.7 MB) Pool for database buffers
   
   Swap space requirements estimated
   ================================================
   Shared memory....................: 100446.8 MB
   ..in pool 10  133.4 MB,   13% used
   ..in pool 40 1024.0 MB,  9553% used !!
   
   
3. In the details of the memory keys contained under the memory pool 40 you can see that one of the buffer areas is using a large space and this space can be larger than the memory pool 40 total size.
   
   Shared memories inside of pool 40
   Key:       42  Size:    21136992 (  20.2 MB) DB TTAB buffer
   Key:       43  Size:    76988824 (  73.4 MB) DB FTAB buffer
   Key:       44  Size:    21676440 (  20.7 MB) DB IREC buffer
   Key:       45  Size:     8362392 (   8.0 MB) DB short nametab buffer
   Key:       46  Size:       20480 (   0.0 MB) DB sync table
   Key:       47  Size:  102400001024 (97656.2 MB) DB CUA buffer
   Key:       48  Size:      500000 (   0.5 MB) Number range buffer
   Key:       49  Size:     2968344 (   2.8 MB) Spool admin (SpoolWP+DiaWP)

SAP Netweaver release independent

system_down, instance_unavailable, buffer_pool, memory, shared, production, 40, CUA, DB, sappfpar, startsap, SAP, dispatcher, extended,  Maximum shared memory segment size exceeded, key , KBA , BC-CST-STS , Startup Service , BC-DB-DBI , DB Independent Database Interface , BC-ABA , ABAP Runtime Environment - ABAP Language Issues Only , Problem