diff --git a/components/bench/ycsb.go b/components/bench/ycsb.go
index 2db1e11e5c..82bf3da5f4 100644
--- a/components/bench/ycsb.go
+++ b/components/bench/ycsb.go
@@ -84,11 +84,11 @@ func (config ycsbConfig) toProperties() (*properties.Properties, error) {
 
 	// these config are always included in the config file
 	// should be overwritten if they are passed through the command line
-	if config.ReadProportion != 0 {
+	if config.ReadProportion != 0.95 {
 		// we don't need to check errors since we disabled expansion
 		_, _, _ = result.Set("readproportion", fmt.Sprint(config.ReadProportion))
 	}
-	if config.UpdateProportion != 0 {
+	if config.UpdateProportion != 0.05 {
 		_, _, _ = result.Set("updateproportion", fmt.Sprint(config.UpdateProportion))
 	}
 	if config.ScanProportion != 0 {
diff --git a/embed/templates/systemd/system.service.tpl b/embed/templates/systemd/system.service.tpl
index d4fd62c9ce..3d9966ab13 100644
--- a/embed/templates/systemd/system.service.tpl
+++ b/embed/templates/systemd/system.service.tpl
@@ -25,7 +25,7 @@ LimitSTACK=10485760
 AmbientCapabilities=CAP_NET_RAW
 {{- end}}
 User={{.User}}
-ExecStart={{.DeployDir}}/scripts/run_{{.ServiceName}}.sh
+ExecStart=/bin/bash -c '{{.DeployDir}}/scripts/run_{{.ServiceName}}.sh'
 {{- if eq .ServiceName "prometheus"}}
 ExecReload=/bin/bash -c 'kill -HUP $MAINPID $(pidof {{.DeployDir}}/bin/ng-monitoring-server)'
 {{end}}
diff --git a/embed/templates/systemd/tispark.service.tpl b/embed/templates/systemd/tispark.service.tpl
index c3545c97bc..843dbdebdb 100644
--- a/embed/templates/systemd/tispark.service.tpl
+++ b/embed/templates/systemd/tispark.service.tpl
@@ -7,8 +7,8 @@ User={{.User}}
 {{- if ne .JavaHome ""}}
 Environment="JAVA_HOME={{.JavaHome}}"
 {{- end}}
-ExecStart={{.DeployDir}}/sbin/start-{{.ServiceName}}.sh
-ExecStop={{.DeployDir}}/sbin/stop-{{.ServiceName}}.sh
+ExecStart=/bin/bash -c '{{.DeployDir}}/sbin/start-{{.ServiceName}}.sh'
+ExecStop=/bin/bash -c '{{.DeployDir}}/sbin/stop-{{.ServiceName}}.sh'
 Type=forking
 {{- if .Restart}}
 Restart={{.Restart}}
diff --git a/pkg/cluster/operation/check.go b/pkg/cluster/operation/check.go
index 549d854cc4..682238533b 100644
--- a/pkg/cluster/operation/check.go
+++ b/pkg/cluster/operation/check.go
@@ -189,8 +189,8 @@ func checkOSInfo(opt *CheckOptions, osInfo *sysinfo.OS) *CheckResult {
 		// check version
 		// CentOS 8 is known to be not working, and we don't have plan to support it
 		// as of now, we may add support for RHEL 8 based systems in the future.
-		if ver, _ := strconv.ParseFloat(osInfo.Version, 64); ver < 7 || ver >= 8 {
-			result.Err = fmt.Errorf("%s %s not supported, use version 7 please",
+		if ver, _ := strconv.ParseFloat(osInfo.Version, 64); ver < 7 {
+			result.Err = fmt.Errorf("%s %s not supported, use version 8 please",
 				osInfo.Name, osInfo.Release)
 			return result
 		}