How To Remove Shared Memory Segments

Question

Remove Shared Memory Segments

Answer

Directions for removing shared memory segments are as follows: (must be root)

1. Get your SERVERNUM from the onconfig
2. Convert that to hex and add it to 5256 in hex
3. ipcs -m |grep 5256+SERVERNUM(in hex)
4. The ID is the second column in the output. Write down each of the ID numbers.
5. Take the list of IDs and run ipcrm -m ID for each ID.

so an example is as follows: 

1. onstat -c |grep SERVERNUM 
SERVERNUM 60 # Unique id corresponding to a Dynamic Server Instance 

2. 0x5256 + 0x3c = 0x5292 

3. ipcs -m |grep 5292 
m 121 0x52924801 --rw-rw---- root informix 
m 122 0x52924802 --rw-rw---- root informix 
m 123 0x52924803 --rw-rw-rw- root informix 

4. ipcrm -m 121 
ipcrm -m 122 
ipcrm -m 123 

5. this command will confirm the segment has been removed 
ipcs -m |grep 5292

http://www-01.ibm.com/support/knowledgecenter/api/content/SSGU8G_11.50.0/com.ibm.admin.doc/ids_admin_1218.htm

http://www-01.ibm.com/support/docview.wss?uid=swg21326141