AIX TROUBLE SHOOTING记录4 cannot fork问题

beginner-bj

问题现象：帐户mydb2admin无法登录，telnet时报cannot fork: too many processes。
myaix#/etc/security> su - mydb2admin
/etc/profile[50]: cannot fork: too many processes
.profile[13]: cannot fork: too many processes
.profile[13]: cannot fork: too many processes
.profile[13]: cannot fork: too many processes
.profile[13]: cannot fork: too many processes
.profile[13]: cannot fork: too many processes
.profile[13]: cannot fork: too many processes
.profile[13]: cannot fork: too many processes
.profile[13]: cannot fork: too many processes
.profile[13]: cannot fork: too many processes
.profile[13]: cannot fork: too many processes
.profile[13]: cannot fork: too many processes
.profile[13]: cannot fork: too many processes
.profile[13]: cannot fork: too many processes
$
$
$ who
ksh: cannot fork: too many processes
$ ulimit -a
time(seconds)        unlimited
file(blocks)         unlimited
data(kbytes)         unlimited
stack(kbytes)        4194304
memory(kbytes)       unlimited
coredump(blocks)     unlimited
nofiles(descriptors) 2000
$ who
ksh: cannot fork: too many processes
$

分析过程：GOOGLE搜了一下，都说是PAGING SPACE不够造成的，需要扩大PAGING SPACE，但实际并非如此。因为如果这样，errpt和alog会有相关的报错，而实际上并没有。
myaix#/etc/security> ps -elf |grep mydb2admin |wc -l
     502
myaix#/etc/security> lsattr -El sys0 |grep maxuproc
maxuproc        500               Maximum number of PROCESSES allowed per user      True
myaix#/etc/security>

解决办法：smit system进去，改maxuproc为1000。

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