How to calculate shared memory Shareplex using (4266390)

How to calculate shared memory Shareplex using

Go to shareplex variable directory/rim (SP_SYS_VARDIR/RIM)

od -x shminfo.ipc

For example

alvsupu07 # od -x shstinfo.ipc
0000000 0400 0046 fcc0 0000 0001 7253 0080 0000
0000020 0300 000c
0000024
alvsupu07 # ipcs -m | grep 7253
m 67108940 0x417253 --rw-r--r-- oracle dba
m 67108936 0x317253 --rw-r--r-- oracle dba
m 67108935 0x117253 --rw-r--r-- oracle dba
m 67108934 0x17253 --rw-r--r-- oracle dba

This means shareplex has 4 shared memory segments for this sp_cop.

shmmni — Maximum number of shared memory segments on the system
shmseg — Maximum number of shared memory segments attached to a process
shmmax — Maximum size of a single shared memory segment (bytes)