diff --git a/config/config.go b/config/config.go
index 02467c1c3a8c4..8b4eab7703c48 100644
--- a/config/config.go
+++ b/config/config.go
@@ -257,8 +257,10 @@ type Config struct {
 	// The following items are deprecated. We need to keep them here temporarily
 	// to support the upgrade process. They can be removed in future.
 
-	// EnableBatchDML, unused since bootstrap v90
-	EnableBatchDML bool `toml:"enable-batch-dml" json:"enable-batch-dml"`
+	// EnableBatchDML, MemQuotaQuery, OOMAction unused since bootstrap v90
+	EnableBatchDML bool   `toml:"enable-batch-dml" json:"enable-batch-dml"`
+	MemQuotaQuery  int64  `toml:"mem-quota-query" json:"mem-quota-query"`
+	OOMAction      string `toml:"oom-action" json:"oom-action"`
 }
 
 // UpdateTempStoragePath is to update the `TempStoragePath` if port/statusPort was changed
@@ -428,6 +430,12 @@ type Log struct {
 	SlowThreshold       uint64     `toml:"slow-threshold" json:"slow-threshold"`
 	ExpensiveThreshold  uint       `toml:"expensive-threshold" json:"expensive-threshold"`
 	RecordPlanInSlowLog uint32     `toml:"record-plan-in-slow-log" json:"record-plan-in-slow-log"`
+
+	// The following items are deprecated. We need to keep them here temporarily
+	// to support the upgrade process. They can be removed in future.
+
+	// QueryLogMaxLen, unused since bootstrap v90
+	QueryLogMaxLen uint64 `toml:"query-log-max-len" json:"query-log-max-len"`
 }
 
 // Instance is the section of instance scope system variables.
@@ -616,11 +624,12 @@ type Performance struct {
 	StatsLoadConcurrency     uint   `toml:"stats-load-concurrency" json:"stats-load-concurrency"`
 	StatsLoadQueueSize       uint   `toml:"stats-load-queue-size" json:"stats-load-queue-size"`
 	EnableStatsCacheMemQuota bool   `toml:"enable-stats-cache-mem-quota" json:"enable-stats-cache-mem-quota"`
-
 	// The following items are deprecated. We need to keep them here temporarily
 	// to support the upgrade process. They can be removed in future.
 
-	RunAutoAnalyze bool `toml:"run-auto-analyze" json:"run-auto-analyze"`
+	// CommitterConcurrency, RunAutoAnalyze unused since bootstrap v90
+	CommitterConcurrency int  `toml:"committer-concurrency" json:"committer-concurrency"`
+	RunAutoAnalyze       bool `toml:"run-auto-analyze" json:"run-auto-analyze"`
 }
 
 // PlanCache is the PlanCache section of the config.
diff --git a/session/bootstrap.go b/session/bootstrap.go
index 372a879e262fe..3e9a46fe4e878 100644
--- a/session/bootstrap.go
+++ b/session/bootstrap.go
@@ -615,7 +615,7 @@ const (
 	version88 = 88
 	// version89 adds the tables mysql.advisory_locks
 	version89 = 89
-	// version90 converts enable-batch-dml to a sysvar
+	// version90 converts enable-batch-dml, mem-quota-query, query-log-max-len, committer-concurrency, run-auto-analyze, and oom-action to a sysvar
 	version90 = 90
 )
 
@@ -1846,6 +1846,16 @@ func upgradeToVer90(s Session, ver int64) {
 	}
 	valStr := variable.BoolToOnOff(config.GetGlobalConfig().EnableBatchDML)
 	importConfigOption(s, "enable-batch-dml", variable.TiDBEnableBatchDML, valStr)
+	valStr = fmt.Sprint(config.GetGlobalConfig().MemQuotaQuery)
+	importConfigOption(s, "mem-quota-query", variable.TiDBMemQuotaQuery, valStr)
+	valStr = fmt.Sprint((config.GetGlobalConfig().Log.QueryLogMaxLen), 10)
+	importConfigOption(s, "query-log-max-len", variable.TiDBQueryLogMaxLen, valStr)
+	valStr = fmt.Sprint(config.GetGlobalConfig().Performance.CommitterConcurrency)
+	importConfigOption(s, "committer-concurrency", variable.TiDBCommitterConcurrency, valStr)
+	valStr = variable.BoolToOnOff(config.GetGlobalConfig().Performance.RunAutoAnalyze)
+	importConfigOption(s, "run-auto-analyze", variable.TiDBEnableAutoAnalyze, valStr)
+	valStr = config.GetGlobalConfig().OOMAction
+	importConfigOption(s, "oom-action", variable.TiDBMemOOMAction, valStr)
 }
 
 func writeOOMAction(s Session) {