在Debian系统上监控Oracle数据库的性能,可以使用以下几种工具和方法:
journalctl
journalctl -b
journalctl -u 服务名称
journalctl --since "2021-01-01" --until "2021-01-31"
tail -n 10 /var/log/syslog
tail -f /var/log/syslog
grep "error" /var/log/syslog
sudo apt-get update
sudo apt-get install nmon
sudo nmon -c 10 # 持续监控10秒
sudo systemctl status lsnrctl
EXPLAIN PLAN
命令分析查询计划。DBMS_OUTPUT.PUT_LINE
输出信息。SELECT event, count(*) AS waits FROM vsession_event GROUP BY event;
SELECT a.sid, a.serial#, b.username, a.status, a.osuser, a.machine, a.program, a.module, a.action, a.logon_time FROM vsession a, dba_users b WHERE a.username = b.username AND a.lockwait IS NOT NULL;
SELECT name, gets, getmisses, (gets - getmisses) / gets * 100 AS buffer_hit_ratio FROM vbuffer_pool;
通过这些工具和方法,可以有效地监控和优化Debian系统上Oracle数据库的性能。根据具体需求选择合适的工具进行监控和分析。