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复制代码 代码如下:
/* Formatted on 2012/5/31 14:51:13 (QP5 v5.185.11230.41888) */
SELECT D.TABLESPACE_NAME,
       SPACE || 'M' "SUM_SPACE(M)",
       BLOCKS "SUM_BLOCKS",
       SPACE - NVL (FREE_SPACE, 0) || 'M' "USED_SPACE(M)",
       ROUND ( (1 - NVL (FREE_SPACE, 0) / SPACE) * 100, 2) || '%'
          "USED_RATE(%)",
       FREE_SPACE || 'M' "FREE_SPACE(M)"
  FROM (  SELECT TABLESPACE_NAME,
                 ROUND (SUM (BYTES) / (1024 * 1024), 2) SPACE,
                 SUM (BLOCKS) BLOCKS
            FROM DBA_DATA_FILES
        GROUP BY TABLESPACE_NAME) D,
       (  SELECT TABLESPACE_NAME,
                 ROUND (SUM (BYTES) / (1024 * 1024), 2) FREE_SPACE
            FROM DBA_FREE_SPACE
        GROUP BY TABLESPACE_NAME) F
 WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)
UNION ALL                                                           --如果有临时表空间
SELECT D.TABLESPACE_NAME,
       SPACE || 'M' "SUM_SPACE(M)",
       BLOCKS SUM_BLOCKS,
       USED_SPACE || 'M' "USED_SPACE(M)",
       ROUND (NVL (USED_SPACE, 0) / SPACE * 100, 2) || '%' "USED_RATE(%)",
       NVL (FREE_SPACE, 0) || 'M' "FREE_SPACE(M)"
  FROM (  SELECT TABLESPACE_NAME,
                 ROUND (SUM (BYTES) / (1024 * 1024), 2) SPACE,
                 SUM (BLOCKS) BLOCKS
            FROM DBA_TEMP_FILES
        GROUP BY TABLESPACE_NAME) D,
       (  SELECT TABLESPACE_NAME,
                 ROUND (SUM (BYTES_USED) / (1024 * 1024), 2) USED_SPACE,
                 ROUND (SUM (BYTES_FREE) / (1024 * 1024), 2) FREE_SPACE
            FROM V$TEMP_SPACE_HEADER
        GROUP BY TABLESPACE_NAME) F
 WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)
ORDER BY 1;

效果如下:

Oracle中查看表空间使用率的SQL脚本分享

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RTX 5090要首发 性能要翻倍!三星展示GDDR7显存

三星在GTC上展示了专为下一代游戏GPU设计的GDDR7内存。

首次推出的GDDR7内存模块密度为16GB,每个模块容量为2GB。其速度预设为32 Gbps(PAM3),但也可以降至28 Gbps,以提高产量和初始阶段的整体性能和成本效益。

据三星表示,GDDR7内存的能效将提高20%,同时工作电压仅为1.1V,低于标准的1.2V。通过采用更新的封装材料和优化的电路设计,使得在高速运行时的发热量降低,GDDR7的热阻比GDDR6降低了70%。