あまりにもネタになってないので、少しだけ sysresv のことを書いといた Tweet

共有メモリやセマフォセットの数などの確認は、ipcsでほぼ足りてるわけですが。（複数インスタンスが起動している場合を除く）
あまりにもネタになってないので、少しだけ　sysresvのことを書いといた:)

[oracle@vbgeneric ˜]$ sysresv

IPC Resources for ORACLE_SID "orcl12c" :
Maximum shared memory segment size (shmmax): 4398046511104 bytes
Total system shared memory (shmall): 4398046511104 bytes
Total system shared memory count (shmmni): 4096
*********************** Dumping ipcs output ********************

------ Message Queues --------
key        msqid      owner      perms      used-bytes   messages    

------ Shared Memory Segments --------
key        shmid      owner      perms      bytes      nattch     status      
0x00000000 0          oracle     600        8802304    173                     
0x00000000 32769      oracle     600        822083584  87                      
0x00000000 65538      oracle     600        7974912    87                      
0x21485470 98307      oracle     600        16384      87                      
0x00000000 262148     oracle     600        524288     2          dest         
0x00000000 294917     oracle     600        4194304    2          dest         
0x00000000 393222     oracle     600        33554432   2          dest         
0x00000000 491527     oracle     600        4194304    2          dest         
0x00000000 524296     oracle     600        1048576    2          dest         

------ Semaphore Arrays --------
key        semid      owner      perms      nsems     
0x245b195c 163840     oracle     600        152       
0x245b195d 196609     oracle     600        152       
0x245b195e 229378     oracle     600        152       

*********************** End of ipcs command dump **************


***************** Dumping Resource Limits(s/h) *****************
core file size                         0 KB/UNLIMITED         
data seg size                     UNLIMITED/UNLIMITED         
scheduling priority                    0 KB/0 KB              
file size                         UNLIMITED/UNLIMITED         
pending signals                       30 KB/30 KB             
max locked memory                    128 GB/128 GB            
max memory size                   UNLIMITED/UNLIMITED         
open files                            64 KB/64 KB             
POSIX message queues                 800 KB/800 KB            
real-time priority                     0 KB/0 KB              
stack size                            32 MB/32 MB             
cpu time                          UNLIMITED/UNLIMITED         
max user processes                    16 KB/16 KB             
virtual memory                    UNLIMITED/UNLIMITED         
file locks                        UNLIMITED/UNLIMITED         

***************** End of Resource Limits Dump ******************
Maximum map count configured per process:  65530
Total /dev/shm size: 4050014208 bytes, used: 98304 bytes
Shared Memory:
ID		KEY
32769   	0x00000000
65538   	0x00000000
0       	0x00000000
98307   	0x21485470
Semaphores:
ID		KEY
163840  	0x245b195c
196609  	0x245b195d
229378  	0x245b195e
Oracle Instance alive for sid "orcl12c"
[oracle@vbgeneric ˜]$ 

[oracle@vbgeneric ˜]$  ipcs -sb

------ Semaphore Arrays --------
key        semid      owner      perms      nsems     
0x245b195c 163840     oracle     600        152       
0x245b195d 196609     oracle     600        152       
0x245b195e 229378     oracle     600        152       

[oracle@vbgeneric ˜]$  ipcs -st

------ Semaphore Operation/Change Times --------
semid    owner      last-op                    last-changed              
163840   oracle      Tue May  2 01:35:32 2017   Tue May  2 01:26:30 2017  
196609   oracle      Not set                    Tue May  2 01:26:30 2017  
229378   oracle      Tue May  2 01:26:35 2017   Tue May  2 01:26:30 2017