fix sys tenant backlog with cgroup on

src/share/config/ob_server_config.cpp

@@ -167,6 +167,34 @@ void ObServerConfig::print() const
   OB_LOG(INFO, "===================== *stop server config report* =======================");
 }
 
+double ObServerConfig::get_sys_tenant_default_min_cpu()
+{
+  double min_cpu = server_cpu_quota_min;
+  if (0 == min_cpu) {
+    int64_t cpu_count = get_cpu_count();
+    if (cpu_count < 8) {
+      min_cpu = 1;
+    } else {
+      min_cpu = 2;
+    }
+  }
+  return min_cpu;
+}
+
+double ObServerConfig::get_sys_tenant_default_max_cpu()
+{
+  double max_cpu = server_cpu_quota_min;
+  if (0 == max_cpu) {
+    int64_t cpu_count = get_cpu_count();
+    if (cpu_count < 8) {
+      max_cpu = 1;
+    } else {
+      max_cpu = 2;
+    }
+  }
+  return max_cpu;
+}
+
 int ObServerConfig::deserialize_with_compat(const char *buf, const int64_t data_len, int64_t &pos)
 {
   int ret = OB_SUCCESS;

src/share/config/ob_server_config.h

@@ -80,8 +80,8 @@ public:
   // print all config to log file
   void print() const;
 
-  double get_sys_tenant_default_min_cpu() { return server_cpu_quota_min; }
-  double get_sys_tenant_default_max_cpu() { return server_cpu_quota_max; }
+  double get_sys_tenant_default_min_cpu();
+  double get_sys_tenant_default_max_cpu();
 
   virtual ObServerRole get_server_type() const { return common::OB_SERVER; }
   virtual bool is_debug_sync_enabled() const { return static_cast<int64_t>(debug_sync_timeout) > 0; }

src/share/parameter/ob_parameter_seed.ipp

@@ -272,13 +272,13 @@ DEF_TIME_WITH_CHECKER(max_stale_time_for_weak_consistency, OB_TENANT_PARAMETER,
 DEF_BOOL(enable_monotonic_weak_read, OB_TENANT_PARAMETER, "false",
          "specifies observer supportting atomicity and monotonic order read",
         ObParameterAttr(Section::TENANT, Source::DEFAULT, EditLevel::DYNAMIC_EFFECTIVE));
-DEF_DBL(server_cpu_quota_min, OB_CLUSTER_PARAMETER, "1", "[1,16]",
+DEF_DBL(server_cpu_quota_min, OB_CLUSTER_PARAMETER, "0", "[0,16]",
         "the number of minimal vCPUs allocated to the server tenant"
-        "(a special internal tenant that exists on every observer). Range: [1, 16]",
+        "(a special internal tenant that exists on every observer). 0 stands for adaptive. Range: [0, 16]",
         ObParameterAttr(Section::TENANT, Source::DEFAULT, EditLevel::STATIC_EFFECTIVE));
-DEF_DBL(server_cpu_quota_max, OB_CLUSTER_PARAMETER, "1", "[1,16]",
+DEF_DBL(server_cpu_quota_max, OB_CLUSTER_PARAMETER, "0", "[0,16]",
         "the number of maximal vCPUs allocated to the server tenant"
-        "(a special internal tenant that exists on every observer). Range: [1, 16]",
+        "(a special internal tenant that exists on every observer). 0 stands for adaptive. Range: [0, 16]",
         ObParameterAttr(Section::TENANT, Source::DEFAULT, EditLevel::STATIC_EFFECTIVE));
 DEF_CAP_WITH_CHECKER(_hidden_sys_tenant_memory, OB_CLUSTER_PARAMETER, "0M",
         common::ObConfigTenantMemoryChecker, "[0M,)",

src/share/resource_manager/ob_resource_plan_manager.cpp

@@ -192,7 +192,7 @@ int ObResourcePlanManager::normalize_cpu_directives(ObPlanDirectiveSet &directiv
                   cfs_period_us))) {
         LOG_WARN("fail get cpu cfs period", K(d), K(ret));
       } else {
-        if (d.utilization_limit_ == 100) {
+        if (is_sys_tenant(d.tenant_id_) || d.utilization_limit_ == 100) {
           // 不限制
           d.utilization_limit_ = -1;
         } else {