SQL磁盘设置建议-TEMPDB,日志DB,数据文件放置问题
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16-10-2019 - |
题
我们有一个非常活跃的数据库服务器,其中包含在其上运行的应用程序的收集。最繁忙的两个是一个Laserfiche数据库,该数据库全天进行文档扫描和工作流程处理(平均约为2800批次请求 /秒)和一个路由电子邮件的BlackBerry Server应用程序。还有大约25个小型应用程序数据库。
我们是政府代理商,因此我们只获得了单个DB服务器许可证的预算。
最近,我们获得了SAN来解决磁盘竞争问题。
因此,目前,我们在其自己的磁盘上运行了TEMPDB(RAID 1镜对),并且我们已将事务日志和数据文件移至SAN上。事务日志放在一个逻辑位置,将数据文件放在另一个逻辑位置。从物理上讲,它是相同的数组,但它是一个由RAID 1+0配置中的14个总主轴(磁盘)组成的数组。
一个非常强壮的SAN-而且情况正在好得多。队列长度切成两半。
就在今天,我们也得到了另一种选择。如果当前在文件服务器上需要它,我们也可以拥有4个磁盘数组。我知道通常建议在两个单独的阵列上拥有MDF和LDF目前在单独的逻辑卷中,但共享相同的物理阵列。
从臀部射击,我觉得将MDFS和LDF一起在14主轴突袭1+0阵列上一起射击可能与将它们与4轴上的4轴突袭5阵列分开一样好。但是,我不会在这里问我是否是磁盘逻辑专家。这两种选项都使用基本相同的15K SAS磁盘 - 即每个主轴基本上都是固定的。
因此,从本质上讲,问题是。在单个14个主轴阵列上配置为RAID 1+0的单个主轴阵列是否会通过将数据或登录到自己的4个主轴RAR RAID 5数组来改进?
想法?
更新信息:
我还将注意到,目前的日志量平均队列长度在0.55左右始终保持稳定。数据量的平均队列长度很少超过0.01(通常为0.00)
sys.dm_io_virtual_file_stats查询结果:
<table>
<tr>
<td>database
id</td>
<td>Volume</td>
<td>io_stall_read_ms</td>
<td>num_of_reads</td>
<td>avg_read_stall_ms</td>
<td>io_stall_write_ms</td>
<td>num_of_writes</td>
<td>avg_write_stall_ms</td>
<td>io_stalls</td>
<td>total_io</td>
<td>avg_io_stall_ms</td>
</tr>
<tr>
<td>25</td>
<td>h</td>
<td>175086</td>
<td>1411</td>
<td>124</td>
<td>69</td>
<td>41</td>
<td>1.6</td>
<td>175155</td>
<td>1452</td>
<td>120.5</td>
</tr>
<tr>
<td>16</td>
<td>h</td>
<td>54691</td>
<td>748</td>
<td>73</td>
<td>34</td>
<td>23</td>
<td>1.4</td>
<td>54725</td>
<td>771</td>
<td>70.9</td>
</tr>
<tr>
<td>41</td>
<td>h</td>
<td>192255</td>
<td>982</td>
<td>195.6</td>
<td>5232</td>
<td>2142</td>
<td>2.4</td>
<td>197487</td>
<td>3124</td>
<td>63.2</td>
</tr>
<tr>
<td>24</td>
<td>h</td>
<td>8616</td>
<td>178</td>
<td>48.1</td>
<td>55</td>
<td>22</td>
<td>2.4</td>
<td>8671</td>
<td>200</td>
<td>43.1</td>
</tr>
<tr>
<td>29</td>
<td>h</td>
<td>54617</td>
<td>1247</td>
<td>43.8</td>
<td>71</td>
<td>41</td>
<td>1.7</td>
<td>54688</td>
<td>1288</td>
<td>42.4</td>
</tr>
<tr>
<td>40</td>
<td>h</td>
<td>132664</td>
<td>3158</td>
<td>42</td>
<td>184</td>
<td>85</td>
<td>2.1</td>
<td>132848</td>
<td>3243</td>
<td>41</td>
</tr>
<tr>
<td>15</td>
<td>h</td>
<td>26556</td>
<td>763</td>
<td>34.8</td>
<td>33</td>
<td>23</td>
<td>1.4</td>
<td>26589</td>
<td>786</td>
<td>33.8</td>
</tr>
<tr>
<td>37</td>
<td>h</td>
<td>6943152</td>
<td>500214</td>
<td>13.9</td>
<td>310706380</td>
<td>9083273</td>
<td>34.2</td>
<td>317649532</td>
<td>9583487</td>
<td>33.1</td>
</tr>
<tr>
<td>32</td>
<td>h</td>
<td>14832</td>
<td>426</td>
<td>34.7</td>
<td>42</td>
<td>38</td>
<td>1.1</td>
<td>14874</td>
<td>464</td>
<td>32</td>
</tr>
<tr>
<td>43</td>
<td>h</td>
<td>46937</td>
<td>947</td>
<td>49.5</td>
<td>1203</td>
<td>844</td>
<td>1.4</td>
<td>48140</td>
<td>1791</td>
<td>26.9</td>
</tr>
<tr>
<td>17</td>
<td>h</td>
<td>23166</td>
<td>786</td>
<td>29.4</td>
<td>260</td>
<td>125</td>
<td>2.1</td>
<td>23426</td>
<td>911</td>
<td>25.7</td>
</tr>
<tr>
<td>44</td>
<td>h</td>
<td>65563</td>
<td>2968</td>
<td>22.1</td>
<td>451</td>
<td>334</td>
<td>1.3</td>
<td>66014</td>
<td>3302</td>
<td>20</td>
</tr>
<tr>
<td>27</td>
<td>h</td>
<td>73622</td>
<td>3325</td>
<td>22.1</td>
<td>547</td>
<td>483</td>
<td>1.1</td>
<td>74169</td>
<td>3808</td>
<td>19.5</td>
</tr>
<tr>
<td>31</td>
<td>h</td>
<td>19557</td>
<td>978</td>
<td>20</td>
<td>218</td>
<td>128</td>
<td>1.7</td>
<td>19775</td>
<td>1106</td>
<td>17.9</td>
</tr>
<tr>
<td>13</td>
<td>h</td>
<td>5238308</td>
<td>176396</td>
<td>29.7</td>
<td>70537264</td>
<td>4109175</td>
<td>17.2</td>
<td>75775572</td>
<td>4285571</td>
<td>17.7</td>
</tr>
<tr>
<td>26</td>
<td>h</td>
<td>849303</td>
<td>57475</td>
<td>14.8</td>
<td>496337</td>
<td>19098</td>
<td>26</td>
<td>1345640</td>
<td>76573</td>
<td>17.6</td>
</tr>
<tr>
<td>28</td>
<td>h</td>
<td>12707</td>
<td>799</td>
<td>15.9</td>
<td>103</td>
<td>62</td>
<td>1.6</td>
<td>12810</td>
<td>861</td>
<td>14.9</td>
</tr>
<tr>
<td>42</td>
<td>h</td>
<td>28630</td>
<td>1233</td>
<td>23.2</td>
<td>1139</td>
<td>883</td>
<td>1.3</td>
<td>29769</td>
<td>2116</td>
<td>14.1</td>
</tr>
<tr>
<td>14</td>
<td>h</td>
<td>91425</td>
<td>5480</td>
<td>16.7</td>
<td>3762</td>
<td>2470</td>
<td>1.5</td>
<td>95187</td>
<td>7950</td>
<td>12</td>
</tr>
<tr>
<td>35</td>
<td>h</td>
<td>8253</td>
<td>546</td>
<td>15.1</td>
<td>193</td>
<td>174</td>
<td>1.1</td>
<td>8446</td>
<td>720</td>
<td>11.7</td>
</tr>
<tr>
<td>12</td>
<td>h</td>
<td>33008</td>
<td>1852</td>
<td>17.8</td>
<td>2179</td>
<td>1335</td>
<td>1.6</td>
<td>35187</td>
<td>3187</td>
<td>11</td>
</tr>
<tr>
<td>36</td>
<td>h</td>
<td>4322</td>
<td>470</td>
<td>9.2</td>
<td>150</td>
<td>119</td>
<td>1.3</td>
<td>4472</td>
<td>589</td>
<td>7.6</td>
</tr>
<tr>
<td>6</td>
<td>h</td>
<td>537</td>
<td>61</td>
<td>8.7</td>
<td>21</td>
<td>22</td>
<td>0.9</td>
<td>558</td>
<td>83</td>
<td>6.6</td>
</tr>
<tr>
<td>33</td>
<td>h</td>
<td>4172</td>
<td>585</td>
<td>7.1</td>
<td>63</td>
<td>59</td>
<td>1.1</td>
<td>4235</td>
<td>644</td>
<td>6.6</td>
</tr>
<tr>
<td>30</td>
<td>h</td>
<td>633</td>
<td>71</td>
<td>8.8</td>
<td>57</td>
<td>38</td>
<td>1.5</td>
<td>690</td>
<td>109</td>
<td>6.3</td>
</tr>
<tr>
<td>10</td>
<td>h</td>
<td>479</td>
<td>65</td>
<td>7.3</td>
<td>63</td>
<td>22</td>
<td>2.7</td>
<td>542</td>
<td>87</td>
<td>6.2</td>
</tr>
<tr>
<td>38</td>
<td>h</td>
<td>635</td>
<td>70</td>
<td>8.9</td>
<td>54</td>
<td>40</td>
<td>1.3</td>
<td>689</td>
<td>110</td>
<td>6.2</td>
</tr>
<tr>
<td>19</td>
<td>h</td>
<td>867</td>
<td>125</td>
<td>6.9</td>
<td>133</td>
<td>40</td>
<td>3.2</td>
<td>1000</td>
<td>165</td>
<td>6</td>
</tr>
<tr>
<td>20</td>
<td>h</td>
<td>2157</td>
<td>342</td>
<td>6.3</td>
<td>107</td>
<td>37</td>
<td>2.8</td>
<td>2264</td>
<td>379</td>
<td>6</td>
</tr>
<tr>
<td>18</td>
<td>h</td>
<td>655</td>
<td>84</td>
<td>7.7</td>
<td>109</td>
<td>44</td>
<td>2.4</td>
<td>764</td>
<td>128</td>
<td>5.9</td>
</tr>
<tr>
<td>9</td>
<td>h</td>
<td>22017</td>
<td>1269</td>
<td>17.3</td>
<td>12187</td>
<td>4510</td>
<td>2.7</td>
<td>34204</td>
<td>5779</td>
<td>5.9</td>
</tr>
<tr>
<td>11</td>
<td>h</td>
<td>1641</td>
<td>226</td>
<td>7.2</td>
<td>158</td>
<td>94</td>
<td>1.7</td>
<td>1799</td>
<td>320</td>
<td>5.6</td>
</tr>
<tr>
<td>7</td>
<td>h</td>
<td>556</td>
<td>66</td>
<td>8.3</td>
<td>40</td>
<td>40</td>
<td>1</td>
<td>596</td>
<td>106</td>
<td>5.6</td>
</tr>
<tr>
<td>20</td>
<td>t</td>
<td>639</td>
<td>90</td>
<td>7</td>
<td>118</td>
<td>43</td>
<td>2.7</td>
<td>757</td>
<td>133</td>
<td>5.6</td>
</tr>
<tr>
<td>24</td>
<td>t</td>
<td>1031</td>
<td>167</td>
<td>6.1</td>
<td>67</td>
<td>29</td>
<td>2.2</td>
<td>1098</td>
<td>196</td>
<td>5.6</td>
</tr>
<tr>
<td>25</td>
<td>t</td>
<td>1269</td>
<td>210</td>
<td>6</td>
<td>111</td>
<td>47</td>
<td>2.3</td>
<td>1380</td>
<td>257</td>
<td>5.3</td>
</tr>
<tr>
<td>29</td>
<td>t</td>
<td>680</td>
<td>94</td>
<td>7.2</td>
<td>113</td>
<td>54</td>
<td>2.1</td>
<td>793</td>
<td>148</td>
<td>5.3</td>
</tr>
<tr>
<td>30</td>
<td>t</td>
<td>233</td>
<td>25</td>
<td>9</td>
<td>145</td>
<td>47</td>
<td>3</td>
<td>378</td>
<td>72</td>
<td>5.2</td>
</tr>
<tr>
<td>13</td>
<td>t</td>
<td>11947937</td>
<td>55092</td>
<td>216.9</td>
<td>163346886</td>
<td>33789532</td>
<td>4.8</td>
<td>175294823</td>
<td>33844624</td>
<td>5.2</td>
</tr>
<tr>
<td>15</td>
<td>t</td>
<td>693</td>
<td>119</td>
<td>5.8</td>
<td>82</td>
<td>29</td>
<td>2.7</td>
<td>775</td>
<td>148</td>
<td>5.2</td>
</tr>
<tr>
<td>16</td>
<td>t</td>
<td>731</td>
<td>119</td>
<td>6.1</td>
<td>48</td>
<td>29</td>
<td>1.6</td>
<td>779</td>
<td>148</td>
<td>5.2</td>
</tr>
<tr>
<td>29</td>
<td>h</td>
<td>176</td>
<td>34</td>
<td>5</td>
<td>1</td>
<td>1</td>
<td>0.5</td>
<td>177</td>
<td>35</td>
<td>4.9</td>
</tr>
<tr>
<td>18</td>
<td>t</td>
<td>305</td>
<td>44</td>
<td>6.8</td>
<td>165</td>
<td>52</td>
<td>3.1</td>
<td>470</td>
<td>96</td>
<td>4.8</td>
</tr>
<tr>
<td>5</td>
<td>h</td>
<td>500</td>
<td>75</td>
<td>6.6</td>
<td>60</td>
<td>40</td>
<td>1.5</td>
<td>560</td>
<td>115</td>
<td>4.8</td>
</tr>
<tr>
<td>8</td>
<td>t</td>
<td>462</td>
<td>74</td>
<td>6.2</td>
<td>118</td>
<td>48</td>
<td>2.4</td>
<td>580</td>
<td>122</td>
<td>4.7</td>
</tr>
<tr>
<td>5</td>
<td>t</td>
<td>294</td>
<td>33</td>
<td>8.6</td>
<td>80</td>
<td>47</td>
<td>1.7</td>
<td>374</td>
<td>80</td>
<td>4.6</td>
</tr>
<tr>
<td>3</td>
<td>h</td>
<td>520</td>
<td>109</td>
<td>4.7</td>
<td>3</td>
<td>4</td>
<td>0.6</td>
<td>523</td>
<td>113</td>
<td>4.6</td>
</tr>
<tr>
<td>39</td>
<td>h</td>
<td>394</td>
<td>62</td>
<td>6.3</td>
<td>77</td>
<td>40</td>
<td>1.9</td>
<td>471</td>
<td>102</td>
<td>4.6</td>
</tr>
<tr>
<td>39</td>
<td>t</td>
<td>124</td>
<td>16</td>
<td>7.3</td>
<td>165</td>
<td>47</td>
<td>3.4</td>
<td>289</td>
<td>63</td>
<td>4.5</td>
</tr>
<tr>
<td>8</td>
<td>h</td>
<td>459</td>
<td>78</td>
<td>5.8</td>
<td>93</td>
<td>43</td>
<td>2.1</td>
<td>552</td>
<td>121</td>
<td>4.5</td>
</tr>
<tr>
<td>41</td>
<td>t</td>
<td>8295</td>
<td>470</td>
<td>17.6</td>
<td>4035</td>
<td>2359</td>
<td>1.7</td>
<td>12330</td>
<td>2829</td>
<td>4.4</td>
</tr>
<tr>
<td>31</td>
<td>t</td>
<td>637</td>
<td>91</td>
<td>6.9</td>
<td>170</td>
<td>95</td>
<td>1.8</td>
<td>807</td>
<td>186</td>
<td>4.3</td>
</tr>
<tr>
<td>7</td>
<td>t</td>
<td>242</td>
<td>29</td>
<td>8.1</td>
<td>80</td>
<td>47</td>
<td>1.7</td>
<td>322</td>
<td>76</td>
<td>4.2</td>
</tr>
<tr>
<td>22</td>
<td>h</td>
<td>298</td>
<td>80</td>
<td>3.7</td>
<td>0</td>
<td>1</td>
<td>0</td>
<td>298</td>
<td>81</td>
<td>3.6</td>
</tr>
<tr>
<td>38</td>
<td>t</td>
<td>139</td>
<td>22</td>
<td>6</td>
<td>115</td>
<td>47</td>
<td>2.4</td>
<td>254</td>
<td>69</td>
<td>3.6</td>
</tr>
<tr>
<td>40</td>
<td>t</td>
<td>1016</td>
<td>159</td>
<td>6.4</td>
<td>388</td>
<td>236</td>
<td>1.6</td>
<td>1404</td>
<td>395</td>
<td>3.5</td>
</tr>
<tr>
<td>22</td>
<td>t</td>
<td>76</td>
<td>18</td>
<td>4</td>
<td>7</td>
<td>5</td>
<td>1.2</td>
<td>83</td>
<td>23</td>
<td>3.5</td>
</tr>
<tr>
<td>44</td>
<td>t</td>
<td>873</td>
<td>133</td>
<td>6.5</td>
<td>479</td>
<td>263</td>
<td>1.8</td>
<td>1352</td>
<td>396</td>
<td>3.4</td>
</tr>
<tr>
<td>4</td>
<td>h</td>
<td>10565</td>
<td>2057</td>
<td>5.1</td>
<td>2840</td>
<td>2061</td>
<td>1.4</td>
<td>13405</td>
<td>4118</td>
<td>3.3</td>
</tr>
<tr>
<td>32</td>
<td>t</td>
<td>94</td>
<td>18</td>
<td>4.9</td>
<td>72</td>
<td>33</td>
<td>2.1</td>
<td>166</td>
<td>51</td>
<td>3.2</td>
</tr>
<tr>
<td>19</td>
<td>t</td>
<td>116</td>
<td>16</td>
<td>6.8</td>
<td>116</td>
<td>60</td>
<td>1.9</td>
<td>232</td>
<td>76</td>
<td>3</td>
</tr>
<tr>
<td>11</td>
<td>t</td>
<td>144</td>
<td>18</td>
<td>7.6</td>
<td>181</td>
<td>91</td>
<td>2</td>
<td>325</td>
<td>109</td>
<td>3</td>
</tr>
<tr>
<td>10</td>
<td>t</td>
<td>69</td>
<td>12</td>
<td>5.3</td>
<td>48</td>
<td>29</td>
<td>1.6</td>
<td>117</td>
<td>41</td>
<td>2.8</td>
</tr>
<tr>
<td>6</td>
<td>t</td>
<td>69</td>
<td>11</td>
<td>5.8</td>
<td>40</td>
<td>29</td>
<td>1.3</td>
<td>109</td>
<td>40</td>
<td>2.7</td>
</tr>
<tr>
<td>1</td>
<td>h</td>
<td>941</td>
<td>181</td>
<td>5.2</td>
<td>368</td>
<td>356</td>
<td>1</td>
<td>1309</td>
<td>537</td>
<td>2.4</td>
</tr>
<tr>
<td>9</td>
<td>t</td>
<td>5034</td>
<td>394</td>
<td>12.7</td>
<td>9584</td>
<td>5599</td>
<td>1.7</td>
<td>14618</td>
<td>5993</td>
<td>2.4</td>
</tr>
<tr>
<td>17</td>
<td>t</td>
<td>1335</td>
<td>213</td>
<td>6.2</td>
<td>1293</td>
<td>1119</td>
<td>1.2</td>
<td>2628</td>
<td>1332</td>
<td>2</td>
</tr>
<tr>
<td>3</td>
<td>h</td>
<td>21</td>
<td>6</td>
<td>3</td>
<td>15</td>
<td>13</td>
<td>1.1</td>
<td>36</td>
<td>19</td>
<td>1.8</td>
</tr>
<tr>
<td>34</td>
<td>h</td>
<td>1140</td>
<td>132</td>
<td>8.6</td>
<td>4146</td>
<td>2921</td>
<td>1.4</td>
<td>5286</td>
<td>3053</td>
<td>1.7</td>
</tr>
<tr>
<td>14</td>
<td>t</td>
<td>714</td>
<td>111</td>
<td>6.4</td>
<td>10175</td>
<td>6589</td>
<td>1.5</td>
<td>10889</td>
<td>6700</td>
<td>1.6</td>
</tr>
<tr>
<td>42</td>
<td>t</td>
<td>949</td>
<td>139</td>
<td>6.8</td>
<td>3420</td>
<td>2671</td>
<td>1.3</td>
<td>4369</td>
<td>2810</td>
<td>1.6</td>
</tr>
<tr>
<td>37</td>
<td>t</td>
<td>4006</td>
<td>489</td>
<td>8.2</td>
<td>15548682</td>
<td>9892846</td>
<td>1.6</td>
<td>15552688</td>
<td>9893335</td>
<td>1.6</td>
</tr>
<tr>
<td>2</td>
<td>f</td>
<td>164348</td>
<td>106669</td>
<td>1.5</td>
<td>178498</td>
<td>121970</td>
<td>1.5</td>
<td>342846</td>
<td>228639</td>
<td>1.5</td>
</tr>
<tr>
<td>28</td>
<td>t</td>
<td>1305</td>
<td>194</td>
<td>6.7</td>
<td>7006</td>
<td>5797</td>
<td>1.2</td>
<td>8311</td>
<td>5991</td>
<td>1.4</td>
</tr>
<tr>
<td>45</td>
<td>h</td>
<td>123</td>
<td>93</td>
<td>1.3</td>
<td>510</td>
<td>373</td>
<td>1.4</td>
<td>633</td>
<td>466</td>
<td>1.4</td>
</tr>
<tr>
<td>43</td>
<td>t</td>
<td>1243</td>
<td>130</td>
<td>9.5</td>
<td>13330</td>
<td>10836</td>
<td>1.2</td>
<td>14573</td>
<td>10966</td>
<td>1.3</td>
</tr>
<tr>
<td>35</td>
<td>t</td>
<td>329</td>
<td>47</td>
<td>6.9</td>
<td>25471</td>
<td>19582</td>
<td>1.3</td>
<td>25800</td>
<td>19629</td>
<td>1.3</td>
</tr>
<tr>
<td>27</td>
<td>t</td>
<td>1866</td>
<td>294</td>
<td>6.3</td>
<td>12196</td>
<td>10243</td>
<td>1.2</td>
<td>14062</td>
<td>10537</td>
<td>1.3</td>
</tr>
<tr>
<td>12</td>
<td>t</td>
<td>13789</td>
<td>2852</td>
<td>4.8</td>
<td>28818</td>
<td>29040</td>
<td>1</td>
<td>42607</td>
<td>31892</td>
<td>1.3</td>
</tr>
<tr>
<td>4</td>
<td>t</td>
<td>511</td>
<td>67</td>
<td>7.5</td>
<td>158330</td>
<td>130742</td>
<td>1.2</td>
<td>158841</td>
<td>130809</td>
<td>1.2</td>
</tr>
<tr>
<td>34</td>
<td>t</td>
<td>99</td>
<td>13</td>
<td>7.1</td>
<td>134764</td>
<td>112984</td>
<td>1.2</td>
<td>134863</td>
<td>112997</td>
<td>1.2</td>
</tr>
<tr>
<td>2</td>
<td>f</td>
<td>23</td>
<td>147</td>
<td>0.2</td>
<td>17980</td>
<td>16879</td>
<td>1.1</td>
<td>18003</td>
<td>17026</td>
<td>1.1</td>
</tr>
<tr>
<td>1</td>
<td>h</td>
<td>54</td>
<td>10</td>
<td>4.9</td>
<td>1845</td>
<td>1761</td>
<td>1</td>
<td>1899</td>
<td>1771</td>
<td>1.1</td>
</tr>
<tr>
<td>33</td>
<td>t</td>
<td>220</td>
<td>33</td>
<td>6.5</td>
<td>746</td>
<td>980</td>
<td>0.8</td>
<td>966</td>
<td>1013</td>
<td>1</td>
</tr>
<tr>
<td>36</td>
<td>t</td>
<td>199</td>
<td>27</td>
<td>7.1</td>
<td>26330</td>
<td>25429</td>
<td>1</td>
<td>26529</td>
<td>25456</td>
<td>1</td>
</tr>
<tr>
<td>45</td>
<td>t</td>
<td>5</td>
<td>8</td>
<td>0.6</td>
<td>6306</td>
<td>6142</td>
<td>1</td>
<td>6311</td>
<td>6150</td>
<td>1</td>
</tr>
<tr>
<td>26</td>
<td>t</td>
<td>2969</td>
<td>348</td>
<td>8.5</td>
<td>64557</td>
<td>70819</td>
<td>0.9</td>
<td>67526</td>
<td>71167</td>
<td>0.9</td>
</tr>
</table>
解决方案
不幸的是,这是一个很大的“依赖”。您拥有如此多的应用程序,可能具有截然不同的IO配置文件,共享相同的实例/服务器和数组,这使您更加复杂。
通常,您需要隔离数据和日志文件,因为IO配置文件是极性相反的。通常,对数据文件的随机读取和对日志的顺序写入。在您的情况下,日志元素有些不同,因为您有多个日志文件。
首先,我了解数据库相对于彼此所消耗的IO。
SELECT
DB_NAME(fs.database_id) AS [Database Name]
, mf.physical_name
, io_stall_read_ms
, num_of_reads
, CAST(io_stall_read_ms / (1.0 + num_of_reads) AS NUMERIC(10, 1)) AS [avg_read_stall_ms]
, io_stall_write_ms
, num_of_writes
, CAST(io_stall_write_ms / (1.0 + num_of_writes) AS NUMERIC(10, 1)) AS [avg_write_stall_ms]
, io_stall_read_ms + io_stall_write_ms AS [io_stalls]
, num_of_reads + num_of_writes AS [total_io]
, CAST((io_stall_read_ms + io_stall_write_ms)
/ (1.0 + num_of_reads + num_of_writes) AS NUMERIC(10,1)) AS [avg_io_stall_ms]
FROM
sys.dm_io_virtual_file_stats(NULL, NULL) AS fs
INNER JOIN sys.master_files AS mf
ON fs.database_id = mf.database_id
AND fs.[file_id] = mf.[file_id]
ORDER BY
DatabaseName ASC, mf.physical_name
-- num_of_reads DESC
-- num_of_writes DESC
OPTION (RECOMPILE) ;
如果您可以将其输出格式化为可读的形式并添加到您的问题中,那么人们可以最好地猜测18个磁盘。
如果我正在做这个盲人,我可能会开始分配:
- 6 RAID10用于最繁忙的数据库的数据文件
- 6 RAID10用于其他数据库的数据文件
- 4 RAID10共享日志
- 2 RAID1 tempDB(您的单个磁盘配置是一个风险的单点故障)
假如说:
- SAN接待其他阵列,因此可以从游泳池中获得热备件
- 快照隔离不使用,也没有对tempdb提出很大的需求
编辑:以下有关队列长度的问题的更新:
在评估SQL Server性能时,队列长度计数器经常被误解。我遇到的最好的类比之一是来自Simon Sabin博客文章, 磁盘队列长度 - 有点像买吉尼斯.
就您而言,它们是如此之低,以至于您可能会遇到一半的纺锤体。不过,从上面查询中看到其他统计数据仍然很有趣。
其他提示
首先,TEMPDB需要在其下进行突袭。当该磁盘失败时,您的SQL Server将停止,直到您更换故障磁盘并将其重新运行为止。如果没有其他人使用4个磁盘RAID 5,您可以重新配置该突袭10,并根据对数字或数据的数据使用,具体取决于IO的需求较低,并将较高的IO放在较大的RAID集合中。
这一切都需要一个好看每个磁盘所获得的perfmon数字,以查看应该去哪个磁盘。