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ORACLE数据库管理员的职责(7) FROM ( SELECT tablespace_name,sum(bytes)/1024/1024 AS sum_m FROM dba_data_files GROUP BY tablespace_name),
( SELECT tablespace_name AS fs_ts_name, max(bytes)/1024/1024 AS max_m, count(blocks) AS count_blocks, sum(bytes/1024/1024) AS sum_free_m FROM dba_free_space GROUP BY tablespace_name )
WHERE tablespace_name = fs_ts_name
(7). 检查剩余表空间
SELECT tablespace_name, sum ( blocks ) as free_blk ,
trunc ( sum ( bytes ) /(1024*1024) ) as free_m,
max ( bytes ) / (1024) as big_chunk_k, count (*) as num_chunks
FROM dba_free_space GROUP BY tablespace_name;
(8). 监控数据库性能
运行bstat/estat生成系统报告
或者使用statspack收集统计数据
(9). 检查数据库性能，记录数据库的cpu使用、IO、buffer命中率等等
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