Apache缓存堆空间增加，没有任何活动。

Question

我们一直在使用Ignite 2.11，并且观察到，在服务器和客户端节点(在接近缓存的情况下)中，所有缓存使用的堆空间都会偶尔增加2或3倍，而不会在任何缓存中添加任何额外的条目。

这种行为是正常的还是有办法防止的？

客户端节点增加的内存占用导致我们的应用程序从内存中消失。

在此之前：

Cache 'ENTRIES_CACHE(@c8)':
+--------------------------------------------------------------+
| Name(@)                         | ENTRIES_CACHE(@c8) |
| Total entries (Heap / Off-heap) | 21 (14 / 7)                |
| Nodes                           | 2                          |
| Total size Min/Avg/Max          | 7 / 10.50 / 14             |
|   Heap size Min/Avg/Max         | 7 / 7.00 / 7               |
|   Off-heap size Min/Avg/Max     | 0 / 3.50 / 7               |
+--------------------------------------------------------------+

Nodes for: ENTRIES_CACHE(@c8)
+================================================================================================================+
|     Node ID8(@), IP      | CPUs | Heap Used | CPU Load |   Up Time    | Size (Primary / Backup)  | Hi/Mi/Rd/Wr |
+================================================================================================================+
| 9C82B7D0(@n1), 127.0.0.1 | 16   | 22.86 %   | 0.23 %   | 04:31:12.703 | Total: 7 (7 / 0)         | Hi: 0       |
|                          |      |           |          |              |   Heap: 7 (7 / <n/a>)    | Mi: 0       |
|                          |      |           |          |              |   Off-Heap: 0 (0 / 0)    | Rd: 0       |
|                          |      |           |          |              |   Off-Heap Memory: 0     | Wr: 0       |
+--------------------------+------+-----------+----------+--------------+--------------------------+-------------+
| 7116937A(@n0), 127.0.0.1 | 1    | 18.70 %   | 5.33 %   | 23:01:35.501 | Total: 14 (14 / 0)       | Hi: 0       |
|                          |      |           |          |              |   Heap: 7 (7 / <n/a>)    | Mi: 0       |
|                          |      |           |          |              |   Off-Heap: 7 (7 / 0)    | Rd: 0       |
|                          |      |           |          |              |   Off-Heap Memory: <n/a> | Wr: 0       |
+----------------------------------------------------------------------------------------------------------------+

之后：

Cache 'ENTRIES_CACHE(@c8)':
+--------------------------------------------------------------+
| Name(@)                         | ENTRIES_CACHE(@c8) |
| Total entries (Heap / Off-heap) | 21 (14 / 7)                |
| Nodes                           | 2                          |
| Total size Min/Avg/Max          | 7 / 10.50 / 14             |
|   Heap size Min/Avg/Max         | 7 / 7.00 / 7               |
|   Off-heap size Min/Avg/Max     | 0 / 3.50 / 7               |
+--------------------------------------------------------------+

Nodes for: ENTRIES_CACHE(@c8)
+================================================================================================================+
|     Node ID8(@), IP      | CPUs | Heap Used | CPU Load |   Up Time    | Size (Primary / Backup)  | Hi/Mi/Rd/Wr |
+================================================================================================================+
| 9C82B7D0(@n1), 127.0.0.1 | 16   | 30.79 %   | 14.73 %  | 04:36:30.703 | Total: 7 (7 / 0)         | Hi: 0       |
|                          |      |           |          |              |   Heap: 7 (7 / <n/a>)    | Mi: 0       |
|                          |      |           |          |              |   Off-Heap: 0 (0 / 0)    | Rd: 0       |
|                          |      |           |          |              |   Off-Heap Memory: 0     | Wr: 0       |
+--------------------------+------+-----------+----------+--------------+--------------------------+-------------+
| 7116937A(@n0), 127.0.0.1 | 1    | 31.67 %   | 58.67 %  | 23:06:54.534 | Total: 14 (14 / 0)       | Hi: 0       |
|                          |      |           |          |              |   Heap: 7 (7 / <n/a>)    | Mi: 0       |
|                          |      |           |          |              |   Off-Heap: 7 (7 / 0)    | Rd: 0       |
|                          |      |           |          |              |   Off-Heap Memory: <n/a> | Wr: 0       |
+----------------------------------------------------------------------------------------------------------------+

Answer 1

尝试使用jmap转储内存，如果有类似内存泄漏的情况，请使用MAT挖掘，当使用Apache时，特别是当集群重新启动的某个节点会导致内存泄漏时，我遇到了这样的问题。