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7#
发表于 2013-7-16 10:25:11
thinking 发表于 2013-7-16 09:07
谢谢,之前我就怀疑存储I/O性能较差,您能指出那几个指标能证明此存储存在性能问题吗? ...
Load Profile
| Per Second | Per Transaction | Per Exec | Per Call | DB Time(s): | 1.5 | 1.4 | 0.05 | 0.06 | DB CPU(s): | 0.2 | 0.2 | 0.01 | 0.01 | Redo size: | 82,588.5 | 79,831.9 | | | Logical reads: | 3,598.9 | 3,478.8 | | | Block changes: | 239.5 | 231.5 | | | Physical reads: | 2,770.7 | 2,678.2 | | | Physical writes: | 711.6 | 687.8 | | | User calls: | 23.8 | 23.0 | | | Parses: | 18.9 | 18.2 | | | Hard parses: | 0.4 | 0.4 | | | W/A MB processed: | 2.6 | 2.5 | | | Logons: | 0.1 | 0.1 | | | Executes: | 28.9 | 28.0 | | | Rollbacks: | 0.0 | 0.0 | | | Transactions: | 1.0 | | | |
File IO Stats- ordered by Tablespace, File
Tablespace | Filename | Reads | Av Reads/s | Av Rd(ms) | Av Blks/Rd | Writes | Av Writes/s | Buffer Waits | Av Buf Wt(ms) | BSM | /app/bsmdata/bsm9.dbf | 9,424 | 3 | 9.98 | 104.94 | 528 | 0 | 0 | 0.00 | BSM | /app/bsmdata/bsm9_1.dbf | 10,683 | 3 | 8.49 | 122.35 | 105 | 0 | 0 | 0.00 | BSM | /app/bsmdata/bsm9_2.dbf | 10,369 | 3 | 10.00 | 123.51 | 9 | 0 | 0 | 0.00 | BSM | /app/bsmdata/bsm9_3.dbf | 12,990 | 4 | 10.70 | 123.78 | 11 | 0 | 0 | 0.00 | BSM | /app/bsmdata/bsm9_4.dbf | 13,699 | 4 | 10.84 | 123.39 | 32 | 0 | 0 | 0.00 | BSM | /app/bsmdata/bsm9_5.dbf | 10,235 | 3 | 11.12 | 114.64 | 247 | 0 | 0 | 0.00 | BSM | /app/bsmdata/bsm9_6.dbf | 4,272 | 1 | 15.21 | 92.36 | 1,809 | 1 | 0 | 0.00 | BSM | /app/bsmdata/bsm9_7.dbf | 5,129 | 1 | 21.59 | 1.78 | 11,380 | 3 | 0 | 0.00 | BSM_TEMP | /app/bsmdata/bsm9_temp.dbf | 43,890 | 12 | 0.00 | 31.00 | 79,511 | 22 | 0 | | SYSAUX | /app/bsmdata/bsm/sysaux01.dbf | 2,358 | 1 | 20.38 | 1.73 | 1,979 | 1 | 0 | 0.00 | SYSTEM | /app/bsmdata/bsm/system01.dbf | 9,304 | 3 | 5.22 | 2.39 | 221 | 0 | 0 | 0.00 | TEMP | /app/bsmdata/bsm/temp01.dbf | 1 | 0 | 0.00 | 1.00 | 1 | 0 | 0 | | UNDOTBS1 | /app/bsmdata/bsm/undotbs01.dbf | 11 | 0 | 7.27 | 1.00 | 2,002 | 1 | 4 | 0.00 | USERS | /app/bsmdata/bsm/users01.dbf | 2 | 0 | 20.00 | 1.00 | 0 | 0 | 0 | 0.00 |
每秒的IO数据量不到30M,每秒的IO次数几十次,这么低的IO负载情况下平均每次读取时间基本都超过了10ms,有的甚至到了20ms,理想的速度应该在5ms以内的。
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