kkjcre1p: unable to spawn jobq slav

客户反应工作站软件偶尔会出现连接不上后台的情况，等待一段时间可以连接上，初步怀疑是连接数不够问题。以下为日志一部分报错内容。
 
第一处日志
Mon Sep 26 15:06:59 2011
Process m000 died, see its trace file
Mon Sep 26 15:06:59 2011
ksvcreate: Process(m000) creation failed
Mon Sep 26 15:08:06 2011
Process m001 died, see its trace file
Mon Sep 26 15:08:06 2011
ksvcreate: Process(m001) creation failed
Mon Sep 26 15:11:26 2011
Process J000 died, see its trace file
Mon Sep 26 15:11:26 2011
kkjcre1p: unable to spawn jobq slave process
Mon Sep 26 15:11:26 2011
Errors in file /home/oracle/orabase/admin/ORACLE/bdump/oracle_cjq0_28852.trc:
第二处日志
ORA-00444: background process "EMN0" failed while starting
ORA-00020: maximum number of processes () exceeded
Mon Sep 26 15:16:08 2011
Process J000 died, see its trace file
Mon Sep 26 15:16:08 2011
kkjcre1p: unable to spawn jobq slave process
Mon Sep 26 15:16:08 2011
Errors in file /home/oracle/orabase/admin/ORACLE/bdump/oracle_cjq0_28852.trc:
根据提示信息可以了解到系统无法生成job相关的进程，同时达到processes最大限制而出错的。
查看系统processes和sessions
SQL> show parameter processes
 
NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
aq_tm_processes                      integer     0
db_writer_processes                  integer     1
gcs_server_processes                 integer     0
job_queue_processes                  integer     10
log_archive_max_processes            integer     2
processes                            integer     150
SQL> show parameter sessions
 
NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
java_max_sessionspace_size           integer     0
java_soft_sessionspace_limit         integer     0
license_max_sessions                 integer     0
license_sessions_warning             integer     0
logmnr_max_persistent_sessions       integer     1
sessions                             integer     170
shared_server_sessions            &nb