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Diffstat (limited to 'docs/configuration.md')
| -rw-r--r-- | docs/configuration.md | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/docs/configuration.md b/docs/configuration.md index 8d3442625b..b078c7c111 100644 --- a/docs/configuration.md +++ b/docs/configuration.md @@ -132,6 +132,15 @@ Apart from these, the following properties are also available, and may be useful </td> </tr> <tr> + <td>spark.storage.memoryMapThreshold</td> + <td>8192</td> + <td> + Size of a block, in bytes, above which Spark memory maps when reading a block from disk. + This prevents Spark from memory mapping very small blocks. In general, memory + mapping has high overhead for blocks close to or below the page size of the operating system. + </td> +</tr> +<tr> <td>spark.tachyonStore.baseDir</td> <td>System.getProperty("java.io.tmpdir")</td> <td> |