MemSQL 为 10MB 数据占用 15GB 内存
MemSQL takes 15GB memory for 10MB of data
我已经使用以下资源按照以下方式安装了 memsql 5.1.2。
Google cloud server
HDD: 100GB
Machine type: n1-standard-4 (4 vCPUs, 15 GB memory)
实施：
2 MEMSQL 节点运行在同一台机器上的以下端口上
3306 Master Aggregator
3307 Leaf
资源利用率：
Memory 14.16 GB / 14.69 GB
Paging 0 B/s
Database size - 10MB
1818 memsql 1.1% 77% /var/lib/memsql/leaf-3307/memsqld --defaults-file=/var/lib/memsql/leaf-3307/memsql.cnf --pid-file=/var/lib/memsql/leaf-3307/data/memsqld.pid --user=memsql
2736 memsql 0.3% 16% /var/lib/memsql/master-3306/memsqld --defaults-file=/var/lib/memsql/master-330
注意：服务器中没有实现交换内存。
数据库大小由运行对 information_schema.TABLES 的查询获取。
所有数据都以行存储的形式存在，因为我们必须 运行 通过考虑表之间的许多关系进行查询。
一旦 memsql 启动，内存就会上升到 70% 并继续增加，2-3 小时后，当尝试连接 memsql 时，内存会出现以下错误，之后也无法连接。
OperationalError: (1836, "Leaf 'xx.xxx.x.xx':3307 failed while executing this query. Try re-running the query.")
[Mon Mar 27 09:26:31.163455 2017] [:error] [pid 1718] [remote xxx.xxx.xxx.xxx:9956]
唯一的解决办法是重启服务器，因为它已经占用了所有内存。
我能为此做什么？它的实施方式有问题吗？我应该在此处附上任何日志吗？
Show status extended; 查询给出如下结果
+-------------------------------------+------------------------------------------------------------------------+
| Variable_name | Value |
+-------------------------------------+------------------------------------------------------------------------+
| Aborted_clients | 48 |
| Aborted_connects | 1 |
| Bytes_received | 85962135 |
| Bytes_sent | 545322701 |
| Connections | 1626 |
| Max_used_connections | 69 |
| Queries | 364793 |
| Questions | 364793 |
| Threads_cached | 19 |
| Threads_connected | 50 |
| Threads_created | 69 |
| Threads_running | 1 |
| Threads_background | 1 |
| Threads_idle | 0 |
| Ready_queue | 0 |
| Idle_queue | 0 |
| Context_switches | 1626 |
| Context_switch_misses | 0 |
| Uptime | 22270 |
| Auto_attach_remaining_seconds | 0 |
| Data_directory | /var/lib/memsql/leaf-3307/data |
| Plancache_directory | /var/lib/memsql/leaf-3307/plancache |
| Transaction_logs_directory | /var/lib/memsql/leaf-3307/data/logs |
| Segments_directory | /var/lib/memsql/leaf-3307/data/columns |
| Snapshots_directory | /var/lib/memsql/leaf-3307/data/snapshots |
| Threads_waiting_for_disk_space | 0 |
| Seconds_until_expiration | -1 |
| License_key | 11111111111111111111111111111111 |
| License_type | community |
| Query_compilations | 62 |
| Query_compilation_failures | 0 |
| GCed_versions_last_sweep | 0 |
| Average_garbage_collection_duration | 21 ms |
| Total_server_memory | 9791.4 MB |
| Alloc_thread_stacks | 70.0 MB |
| Malloc_active_memory | 1254.7 (+0.0) MB |
| Malloc_cumulative_memory | 7315.5 (+0.2) MB |
| Buffer_manager_memory | 1787.8 MB |
| Buffer_manager_cached_memory | 77.2 (-0.1) MB |
| Buffer_manager_unrecycled_memory | 0.0 MB |
| Alloc_skiplist_tower | 263.8 MB |
| Alloc_variable | 501.4 MB |
| Alloc_large_variable | 2.4 MB |
| Alloc_table_primary | 752.6 MB |
| Alloc_deleted_version | 92.9 MB |
| Alloc_internal_key_node | 72.1 MB |
| Alloc_hash_buckets | 459.1 MB |
| Alloc_table_metadata_cache | 1.1 MB |
| Alloc_unit_images | 34.8 MB |
| Alloc_unit_ifn_thunks | 0.6 MB |
| Alloc_object_code_images | 11.6 MB |
| Alloc_compiled_unit_sections | 17.3 MB |
| Alloc_databases_list_entry | 17.9 MB |
| Alloc_plan_cache | 0.1 MB |
| Alloc_replication_large | 232.0 MB |
| Alloc_durability_large | 7239.1 MB |
| Alloc_sharding_partitions | 0.1 MB |
| Alloc_security | 0.1 MB |
| Alloc_log_replay | 0.9 MB |
| Alloc_client_connection | 3.0 MB |
| Alloc_protocol_packet | 6.1 (+0.1) MB |
| Alloc_large_incremental | 0.8 MB |
| Alloc_table_memory | 2144.2 MB |
| Alloc_variable_bucket_16 | allocs:10877846 alloc_MB:166.0 buffer_MB:179.0 cached_buffer_MB:1.9 |
| Alloc_variable_bucket_24 | allocs:4275659 alloc_MB:97.9 buffer_MB:106.8 cached_buffer_MB:1.9 |
| Alloc_variable_bucket_32 | allocs:2875801 alloc_MB:87.8 buffer_MB:93.4 cached_buffer_MB:1.9 |
| Alloc_variable_bucket_40 | allocs:724489 alloc_MB:27.6 buffer_MB:31.0 cached_buffer_MB:1.2 |
| Alloc_variable_bucket_48 | allocs:377060 alloc_MB:17.3 buffer_MB:19.8 cached_buffer_MB:0.9 |
| Alloc_variable_bucket_56 | allocs:228720 alloc_MB:12.2 buffer_MB:14.0 cached_buffer_MB:0.8 |
| Alloc_variable_bucket_64 | allocs:150214 alloc_MB:9.2 buffer_MB:10.1 cached_buffer_MB:0.2 |
| Alloc_variable_bucket_72 | allocs:35264 alloc_MB:2.4 buffer_MB:2.9 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_80 | allocs:14920 alloc_MB:1.1 buffer_MB:1.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_88 | allocs:5582 alloc_MB:0.5 buffer_MB:0.6 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_104 | allocs:8075 alloc_MB:0.8 buffer_MB:1.0 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_128 | allocs:8892 alloc_MB:1.1 buffer_MB:1.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_160 | allocs:17614 alloc_MB:2.7 buffer_MB:3.0 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_200 | allocs:30454 alloc_MB:5.8 buffer_MB:6.9 cached_buffer_MB:0.6 |
| Alloc_variable_bucket_248 | allocs:4875 alloc_MB:1.2 buffer_MB:1.5 cached_buffer_MB:0.2 |
| Alloc_variable_bucket_312 | allocs:371 alloc_MB:0.1 buffer_MB:0.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_384 | allocs:30 alloc_MB:0.0 buffer_MB:0.1 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_480 | allocs:11 alloc_MB:0.0 buffer_MB:0.1 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_600 | allocs:57 alloc_MB:0.0 buffer_MB:0.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_752 | allocs:62 alloc_MB:0.0 buffer_MB:0.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_936 | allocs:42 alloc_MB:0.0 buffer_MB:0.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_1168 | allocs:106 alloc_MB:0.1 buffer_MB:0.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_1480 | allocs:126 alloc_MB:0.2 buffer_MB:0.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_1832 | allocs:0 alloc_MB:0.0 buffer_MB:0.2 cached_buffer_MB:0.2 |
| Alloc_variable_bucket_2288 | allocs:1 alloc_MB:0.0 buffer_MB:0.2 cached_buffer_MB:0.1 |
| Alloc_variable_bucket_2832 | allocs:33 alloc_MB:0.1 buffer_MB:1.1 cached_buffer_MB:0.2 |
| Alloc_variable_bucket_3528 | allocs:16 alloc_MB:0.1 buffer_MB:0.5 cached_buffer_MB:0.1 |
| Alloc_variable_bucket_4504 | allocs:49 alloc_MB:0.2 buffer_MB:0.8 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_5680 | allocs:66 alloc_MB:0.4 buffer_MB:1.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_6224 | allocs:30 alloc_MB:0.2 buffer_MB:1.0 cached_buffer_MB:0.1 |
| Alloc_variable_bucket_7264 | allocs:94 alloc_MB:0.7 buffer_MB:1.5 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_9344 | allocs:70 alloc_MB:0.6 buffer_MB:2.6 cached_buffer_MB:0.2 |
| Alloc_variable_bucket_11896 | allocs:14 alloc_MB:0.2 buffer_MB:2.4 cached_buffer_MB:1.2 |
| Alloc_variable_bucket_14544 | allocs:7 alloc_MB:0.1 buffer_MB:2.4 cached_buffer_MB:1.9 |
| Alloc_variable_bucket_18696 | allocs:18 alloc_MB:0.3 buffer_MB:3.2 cached_buffer_MB:1.9 |
| Alloc_variable_bucket_21816 | allocs:4 alloc_MB:0.1 buffer_MB:0.4 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_26184 | allocs:6 alloc_MB:0.1 buffer_MB:0.9 cached_buffer_MB:0.2 |
| Alloc_variable_bucket_32728 | allocs:13 alloc_MB:0.4 buffer_MB:2.4 cached_buffer_MB:1.4 |
| Alloc_variable_bucket_43648 | allocs:12 alloc_MB:0.5 buffer_MB:1.4 cached_buffer_MB:0.2 |
| Alloc_variable_bucket_65472 | allocs:7 alloc_MB:0.4 buffer_MB:2.8 cached_buffer_MB:1.9 |
| Alloc_variable_bucket_130960 | allocs:3 alloc_MB:0.4 buffer_MB:2.2 cached_buffer_MB:1.9 |
| Alloc_variable_cached_buffers | 21.4 MB |
| Alloc_variable_allocated | 438.7 MB |
| Successful_read_queries | 9048 |
| Successful_write_queries | 19096 |
| Failed_read_queries | 0 |
| Failed_write_queries | 4 |
| Rows_returned_by_reads | 75939 |
| Rows_affected_by_writes | 245 |
| Execution_time_of_reads | 7864 ms |
| Execution_time_of_write | 180311 ms |
| Transaction_buffer_wait_time | 0 ms |
| Transaction_log_flush_wait_time | 0 ms |
| Row_lock_wait_time | 0 ms |
| Ssl_accept_renegotiates | 0 |
| Ssl_accepts | 0 |
| Ssl_callback_cache_hits | 0 |
| Ssl_client_connects | 0 |
| Ssl_connect_renegotiates | 0 |
| Ssl_ctx_verify_depth | 18446744073709551615 |
| Ssl_ctx_verify_mode | 0 |
| Ssl_default_timeout | 0 |
| Ssl_finished_accepts | 0 |
| Ssl_finished_connects | 0 |
| Ssl_session_cache_hits | 0 |
| Ssl_session_cache_misses | 0 |
| Ssl_session_cache_overflows | 0 |
| Ssl_session_cache_size | 20480 |
| Ssl_session_cache_timeouts | 0 |
| Ssl_sessions_reused | 0 |
| Ssl_used_session_cache_entries | 0 |
| Ssl_verify_depth | 0 |
| Ssl_verify_mode | 0 |
| Ssl_cipher | |
| Ssl_cipher_list | |
| Ssl_version | |
| Ssl_session_cache_mode | SERVER |
+-------------------------------------+------------------------------------------------------------------------+
从状态输出可以看出：
- 叶节点总内存10GB
- 7GB Alloc_durability_large
您可以在此处查看这些变量的含义：https://help.memsql.com/hc/en-us/articles/115001091386-What-Is-Using-Memory-on-My-Leaves-
最有趣的是 Alloc_durability_large 中的金额很大，这很不寻常。您是否有大量数据库 and/or 分区？ （您可以通过计算叶节点上显示数据库扩展中的行数来检查。）每个都需要固定数量的事务缓冲区内存（默认为 64 MB）。
我已经使用以下资源按照以下方式安装了 memsql 5.1.2。
Google cloud server
HDD: 100GB
Machine type: n1-standard-4 (4 vCPUs, 15 GB memory)
实施：
2 MEMSQL 节点运行在同一台机器上的以下端口上
3306 Master Aggregator
3307 Leaf
资源利用率：
Memory 14.16 GB / 14.69 GB
Paging 0 B/s
Database size - 10MB
1818 memsql 1.1% 77% /var/lib/memsql/leaf-3307/memsqld --defaults-file=/var/lib/memsql/leaf-3307/memsql.cnf --pid-file=/var/lib/memsql/leaf-3307/data/memsqld.pid --user=memsql
2736 memsql 0.3% 16% /var/lib/memsql/master-3306/memsqld --defaults-file=/var/lib/memsql/master-330
注意：服务器中没有实现交换内存。
数据库大小由运行对 information_schema.TABLES 的查询获取。
所有数据都以行存储的形式存在，因为我们必须 运行 通过考虑表之间的许多关系进行查询。
一旦 memsql 启动，内存就会上升到 70% 并继续增加，2-3 小时后，当尝试连接 memsql 时，内存会出现以下错误，之后也无法连接。
OperationalError: (1836, "Leaf 'xx.xxx.x.xx':3307 failed while executing this query. Try re-running the query.")
[Mon Mar 27 09:26:31.163455 2017] [:error] [pid 1718] [remote xxx.xxx.xxx.xxx:9956]
唯一的解决办法是重启服务器，因为它已经占用了所有内存。
我能为此做什么？它的实施方式有问题吗？我应该在此处附上任何日志吗？
Show status extended; 查询给出如下结果
+-------------------------------------+------------------------------------------------------------------------+
| Variable_name | Value |
+-------------------------------------+------------------------------------------------------------------------+
| Aborted_clients | 48 |
| Aborted_connects | 1 |
| Bytes_received | 85962135 |
| Bytes_sent | 545322701 |
| Connections | 1626 |
| Max_used_connections | 69 |
| Queries | 364793 |
| Questions | 364793 |
| Threads_cached | 19 |
| Threads_connected | 50 |
| Threads_created | 69 |
| Threads_running | 1 |
| Threads_background | 1 |
| Threads_idle | 0 |
| Ready_queue | 0 |
| Idle_queue | 0 |
| Context_switches | 1626 |
| Context_switch_misses | 0 |
| Uptime | 22270 |
| Auto_attach_remaining_seconds | 0 |
| Data_directory | /var/lib/memsql/leaf-3307/data |
| Plancache_directory | /var/lib/memsql/leaf-3307/plancache |
| Transaction_logs_directory | /var/lib/memsql/leaf-3307/data/logs |
| Segments_directory | /var/lib/memsql/leaf-3307/data/columns |
| Snapshots_directory | /var/lib/memsql/leaf-3307/data/snapshots |
| Threads_waiting_for_disk_space | 0 |
| Seconds_until_expiration | -1 |
| License_key | 11111111111111111111111111111111 |
| License_type | community |
| Query_compilations | 62 |
| Query_compilation_failures | 0 |
| GCed_versions_last_sweep | 0 |
| Average_garbage_collection_duration | 21 ms |
| Total_server_memory | 9791.4 MB |
| Alloc_thread_stacks | 70.0 MB |
| Malloc_active_memory | 1254.7 (+0.0) MB |
| Malloc_cumulative_memory | 7315.5 (+0.2) MB |
| Buffer_manager_memory | 1787.8 MB |
| Buffer_manager_cached_memory | 77.2 (-0.1) MB |
| Buffer_manager_unrecycled_memory | 0.0 MB |
| Alloc_skiplist_tower | 263.8 MB |
| Alloc_variable | 501.4 MB |
| Alloc_large_variable | 2.4 MB |
| Alloc_table_primary | 752.6 MB |
| Alloc_deleted_version | 92.9 MB |
| Alloc_internal_key_node | 72.1 MB |
| Alloc_hash_buckets | 459.1 MB |
| Alloc_table_metadata_cache | 1.1 MB |
| Alloc_unit_images | 34.8 MB |
| Alloc_unit_ifn_thunks | 0.6 MB |
| Alloc_object_code_images | 11.6 MB |
| Alloc_compiled_unit_sections | 17.3 MB |
| Alloc_databases_list_entry | 17.9 MB |
| Alloc_plan_cache | 0.1 MB |
| Alloc_replication_large | 232.0 MB |
| Alloc_durability_large | 7239.1 MB |
| Alloc_sharding_partitions | 0.1 MB |
| Alloc_security | 0.1 MB |
| Alloc_log_replay | 0.9 MB |
| Alloc_client_connection | 3.0 MB |
| Alloc_protocol_packet | 6.1 (+0.1) MB |
| Alloc_large_incremental | 0.8 MB |
| Alloc_table_memory | 2144.2 MB |
| Alloc_variable_bucket_16 | allocs:10877846 alloc_MB:166.0 buffer_MB:179.0 cached_buffer_MB:1.9 |
| Alloc_variable_bucket_24 | allocs:4275659 alloc_MB:97.9 buffer_MB:106.8 cached_buffer_MB:1.9 |
| Alloc_variable_bucket_32 | allocs:2875801 alloc_MB:87.8 buffer_MB:93.4 cached_buffer_MB:1.9 |
| Alloc_variable_bucket_40 | allocs:724489 alloc_MB:27.6 buffer_MB:31.0 cached_buffer_MB:1.2 |
| Alloc_variable_bucket_48 | allocs:377060 alloc_MB:17.3 buffer_MB:19.8 cached_buffer_MB:0.9 |
| Alloc_variable_bucket_56 | allocs:228720 alloc_MB:12.2 buffer_MB:14.0 cached_buffer_MB:0.8 |
| Alloc_variable_bucket_64 | allocs:150214 alloc_MB:9.2 buffer_MB:10.1 cached_buffer_MB:0.2 |
| Alloc_variable_bucket_72 | allocs:35264 alloc_MB:2.4 buffer_MB:2.9 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_80 | allocs:14920 alloc_MB:1.1 buffer_MB:1.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_88 | allocs:5582 alloc_MB:0.5 buffer_MB:0.6 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_104 | allocs:8075 alloc_MB:0.8 buffer_MB:1.0 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_128 | allocs:8892 alloc_MB:1.1 buffer_MB:1.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_160 | allocs:17614 alloc_MB:2.7 buffer_MB:3.0 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_200 | allocs:30454 alloc_MB:5.8 buffer_MB:6.9 cached_buffer_MB:0.6 |
| Alloc_variable_bucket_248 | allocs:4875 alloc_MB:1.2 buffer_MB:1.5 cached_buffer_MB:0.2 |
| Alloc_variable_bucket_312 | allocs:371 alloc_MB:0.1 buffer_MB:0.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_384 | allocs:30 alloc_MB:0.0 buffer_MB:0.1 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_480 | allocs:11 alloc_MB:0.0 buffer_MB:0.1 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_600 | allocs:57 alloc_MB:0.0 buffer_MB:0.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_752 | allocs:62 alloc_MB:0.0 buffer_MB:0.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_936 | allocs:42 alloc_MB:0.0 buffer_MB:0.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_1168 | allocs:106 alloc_MB:0.1 buffer_MB:0.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_1480 | allocs:126 alloc_MB:0.2 buffer_MB:0.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_1832 | allocs:0 alloc_MB:0.0 buffer_MB:0.2 cached_buffer_MB:0.2 |
| Alloc_variable_bucket_2288 | allocs:1 alloc_MB:0.0 buffer_MB:0.2 cached_buffer_MB:0.1 |
| Alloc_variable_bucket_2832 | allocs:33 alloc_MB:0.1 buffer_MB:1.1 cached_buffer_MB:0.2 |
| Alloc_variable_bucket_3528 | allocs:16 alloc_MB:0.1 buffer_MB:0.5 cached_buffer_MB:0.1 |
| Alloc_variable_bucket_4504 | allocs:49 alloc_MB:0.2 buffer_MB:0.8 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_5680 | allocs:66 alloc_MB:0.4 buffer_MB:1.2 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_6224 | allocs:30 alloc_MB:0.2 buffer_MB:1.0 cached_buffer_MB:0.1 |
| Alloc_variable_bucket_7264 | allocs:94 alloc_MB:0.7 buffer_MB:1.5 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_9344 | allocs:70 alloc_MB:0.6 buffer_MB:2.6 cached_buffer_MB:0.2 |
| Alloc_variable_bucket_11896 | allocs:14 alloc_MB:0.2 buffer_MB:2.4 cached_buffer_MB:1.2 |
| Alloc_variable_bucket_14544 | allocs:7 alloc_MB:0.1 buffer_MB:2.4 cached_buffer_MB:1.9 |
| Alloc_variable_bucket_18696 | allocs:18 alloc_MB:0.3 buffer_MB:3.2 cached_buffer_MB:1.9 |
| Alloc_variable_bucket_21816 | allocs:4 alloc_MB:0.1 buffer_MB:0.4 cached_buffer_MB:0.0 |
| Alloc_variable_bucket_26184 | allocs:6 alloc_MB:0.1 buffer_MB:0.9 cached_buffer_MB:0.2 |
| Alloc_variable_bucket_32728 | allocs:13 alloc_MB:0.4 buffer_MB:2.4 cached_buffer_MB:1.4 |
| Alloc_variable_bucket_43648 | allocs:12 alloc_MB:0.5 buffer_MB:1.4 cached_buffer_MB:0.2 |
| Alloc_variable_bucket_65472 | allocs:7 alloc_MB:0.4 buffer_MB:2.8 cached_buffer_MB:1.9 |
| Alloc_variable_bucket_130960 | allocs:3 alloc_MB:0.4 buffer_MB:2.2 cached_buffer_MB:1.9 |
| Alloc_variable_cached_buffers | 21.4 MB |
| Alloc_variable_allocated | 438.7 MB |
| Successful_read_queries | 9048 |
| Successful_write_queries | 19096 |
| Failed_read_queries | 0 |
| Failed_write_queries | 4 |
| Rows_returned_by_reads | 75939 |
| Rows_affected_by_writes | 245 |
| Execution_time_of_reads | 7864 ms |
| Execution_time_of_write | 180311 ms |
| Transaction_buffer_wait_time | 0 ms |
| Transaction_log_flush_wait_time | 0 ms |
| Row_lock_wait_time | 0 ms |
| Ssl_accept_renegotiates | 0 |
| Ssl_accepts | 0 |
| Ssl_callback_cache_hits | 0 |
| Ssl_client_connects | 0 |
| Ssl_connect_renegotiates | 0 |
| Ssl_ctx_verify_depth | 18446744073709551615 |
| Ssl_ctx_verify_mode | 0 |
| Ssl_default_timeout | 0 |
| Ssl_finished_accepts | 0 |
| Ssl_finished_connects | 0 |
| Ssl_session_cache_hits | 0 |
| Ssl_session_cache_misses | 0 |
| Ssl_session_cache_overflows | 0 |
| Ssl_session_cache_size | 20480 |
| Ssl_session_cache_timeouts | 0 |
| Ssl_sessions_reused | 0 |
| Ssl_used_session_cache_entries | 0 |
| Ssl_verify_depth | 0 |
| Ssl_verify_mode | 0 |
| Ssl_cipher | |
| Ssl_cipher_list | |
| Ssl_version | |
| Ssl_session_cache_mode | SERVER |
+-------------------------------------+------------------------------------------------------------------------+
从状态输出可以看出：
- 叶节点总内存10GB
- 7GB Alloc_durability_large
您可以在此处查看这些变量的含义：https://help.memsql.com/hc/en-us/articles/115001091386-What-Is-Using-Memory-on-My-Leaves-
最有趣的是 Alloc_durability_large 中的金额很大，这很不寻常。您是否有大量数据库 and/or 分区？ （您可以通过计算叶节点上显示数据库扩展中的行数来检查。）每个都需要固定数量的事务缓冲区内存（默认为 64 MB）。