OceanBase数据库租户分配8G内存空载占用90%为什么?
OceanBase数据库租户在分配8G内存的情况下,即使空载(即无实际业务数据和负载)下仍占用90%的内存,可能有以下原因:
系统开销:
内存池预分配:
资源配置策略:
SQL优化器缓存与执行计划缓存:
事务上下文及并发控制:
监控和诊断信息:
```select a.zone, a.SVR_IP,a.SVR_PORT, b.status,cpu_capacity,cpu_assigned_max,cpu_capacity-cpu_assigned_max as cpu_free,round(memory_limit /1024/1024/1024 ,2) as memory_total_gb,round((memory_limit-mem_capacity) /1024/1024/1024 ,2) as system_memory_gb,round(mem_assigned /1024/1024/1024 ,2) as mem_assigned_gb,round((mem_capacity-mem_assigned) /1024/1024/1024 ,2) as memory_free_gb,round(log_disk_capacity /1024/1024/1024 ,2) as log_disk_capacity_gb,round(log_disk_assigned /1024/1024/1024 ,2) as log_disk_assigned_gb,round((log_disk_capacity-log_disk_assigned) /1024/1024/1024 ,2) as log_disk_free_gb,round((data_disk_capacity /1024/1024/1024 ),2) as data_disk_gb,round((data_disk_in_use /1024/1024/1024 ),2) as data_disk_used_gb,round((data_disk_capacity-data_disk_in_use) /1024/1024/1024 ,2) as data_disk_free_gb from gv$ob_servers a join oceanbase.DBA_OB_SERVERS b on a.zone=b.zone\G;
看下资源
配置的话~/.obd/cluster/deploy name/config.yaml
```
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