今天在處理數據庫問題時，執行su - grid命令時卡住，懷疑是進程數達到上限，修改maxuproc參數之后，立即生效，特此記錄以便於后續繼續對涉及的兩個命令lsattr、chdev命令進行學習。
[zippsdb1:root]:/etc/security>lsattr -El sys0
SW_dist_intr false Enable SW distribution of interrupts True
autorestart true Automatically REBOOT OS after a crash True
boottype disk N/A False
capacity_inc 0.01 Processor capacity increment False
capped false Partition is capped False
chown_restrict true Chown Restriction Mode True
conslogin enable System Console Login False
cpuguard enable CPU Guard True
dedicated false Partition is dedicated False
enhanced_RBAC true Enhanced RBAC Mode True
ent_capacity 0.40 Entitled processor capacity False
frequency 6400000000 System Bus Frequency False
fullcore false Enable full CORE dump True
fwversion IBM,AM780_084 Firmware version and revision levels False
ghostdev 0 Recreate ODM devices on system change / modify PVID True
id_to_partition 0X8000088DDB900070 Partition ID False
id_to_system 0X8000088DDB900000 System ID False
iostat false Continuously maintain DISK I/O history True
keylock normal State of system keylock at boot time False
log_pg_dealloc true Log predictive memory page deallocation events True
max_capacity 8.00 Maximum potential processor capacity False
max_logname 9 Maximum login name length at boot time True
maxbuf 20 Maximum number of pages in block I/O BUFFER CACHE True
maxmbuf 0 Maximum Kbytes of real memory allowed for MBUFS True
maxpout 8193 HIGH water mark for pending write I/Os per file True
maxuproc 128 Maximum number of PROCESSES allowed per user True
min_capacity 0.10 Minimum potential processor capacity False
minpout 4096 LOW water mark for pending write I/Os per file True
modelname IBM,9179-MHD Machine name False
ncargs 256 ARG/ENV list size in 4K byte blocks True
nfs4_acl_compat secure NFS4 ACL Compatibility Mode True
ngroups_allowed 128 Number of Groups Allowed True
os_uuid 3b6c285b-83db-4d88-a0e2-1e160be77ae8 N/A True
pre430core false Use pre-430 style CORE dump True
pre520tune disable Pre-520 tuning compatibility mode True
realmem 25165824 Amount of usable physical memory in Kbytes False
rtasversion 1 Open Firmware RTAS version False
sed_config select Stack Execution Disable (SED) Mode True
systemid IBM,02105C915 Hardware system identifier False
variable_weight 128 Variable processor capacity weight False
[zippsdb1:root]:/etc/security>
[zippsdb1:root]:/etc/security>
[zippsdb1:root]:/etc/security>chdev -l sys0 -a maxuproc=256