diff --git a/api/admin/performance.go b/api/admin/performance.go
index bf2a460..6035b08 100644
--- a/api/admin/performance.go
+++ b/api/admin/performance.go
@@ -10,6 +10,15 @@ import (
 	"runtime/pprof"
 )
 
+const (
+	// Name of file that CPU profile is written to when StartCPUProfiler called
+	cpuProfileFile = "cpu.profile"
+	// Name of file that memory profile is written to when MemoryProfile called
+	memProfileFile = "mem.profile"
+	// Name of file that lock profile is written to
+	lockProfileFile = "lock.profile"
+)
+
 var (
 	errCPUProfilerRunning    = errors.New("cpu profiler already running")
 	errCPUProfilerNotRunning = errors.New("cpu profiler doesn't exist")
@@ -20,12 +29,12 @@ var (
 type Performance struct{ cpuProfileFile *os.File }
 
 // StartCPUProfiler starts measuring the cpu utilization of this node
-func (p *Performance) StartCPUProfiler(filename string) error {
+func (p *Performance) StartCPUProfiler() error {
 	if p.cpuProfileFile != nil {
 		return errCPUProfilerRunning
 	}
 
-	file, err := os.Create(filename)
+	file, err := os.Create(cpuProfileFile)
 	if err != nil {
 		return err
 	}
@@ -52,8 +61,8 @@ func (p *Performance) StopCPUProfiler() error {
 }
 
 // MemoryProfile dumps the current memory utilization of this node
-func (p *Performance) MemoryProfile(filename string) error {
-	file, err := os.Create(filename)
+func (p *Performance) MemoryProfile() error {
+	file, err := os.Create(memProfileFile)
 	if err != nil {
 		return err
 	}
@@ -66,8 +75,8 @@ func (p *Performance) MemoryProfile(filename string) error {
 }
 
 // LockProfile dumps the current lock statistics of this node
-func (p *Performance) LockProfile(filename string) error {
-	file, err := os.Create(filename)
+func (p *Performance) LockProfile() error {
+	file, err := os.Create(lockProfileFile)
 	if err != nil {
 		return err
 	}
diff --git a/api/admin/service.go b/api/admin/service.go
index 3d61730..c5059f0 100644
--- a/api/admin/service.go
+++ b/api/admin/service.go
@@ -39,21 +39,16 @@ func NewService(log logging.Logger, chainManager chains.Manager, peers network.N
 	return &common.HTTPHandler{Handler: newServer}
 }
 
-// StartCPUProfilerArgs are the arguments for calling StartCPUProfiler
-type StartCPUProfilerArgs struct {
-	Filename string `json:"filename"`
-}
-
 // StartCPUProfilerReply are the results from calling StartCPUProfiler
 type StartCPUProfilerReply struct {
 	Success bool `json:"success"`
 }
 
 // StartCPUProfiler starts a cpu profile writing to the specified file
-func (service *Admin) StartCPUProfiler(_ *http.Request, args *StartCPUProfilerArgs, reply *StartCPUProfilerReply) error {
-	service.log.Info("Admin: StartCPUProfiler called with %s", args.Filename)
+func (service *Admin) StartCPUProfiler(_ *http.Request, args *struct{}, reply *StartCPUProfilerReply) error {
+	service.log.Info("Admin: StartCPUProfiler called")
 	reply.Success = true
-	return service.performance.StartCPUProfiler(args.Filename)
+	return service.performance.StartCPUProfiler()
 }
 
 // StopCPUProfilerReply are the results from calling StopCPUProfiler
@@ -68,26 +63,16 @@ func (service *Admin) StopCPUProfiler(_ *http.Request, _ *struct{}, reply *StopC
 	return service.performance.StopCPUProfiler()
 }
 
-// MemoryProfileArgs are the arguments for calling MemoryProfile
-type MemoryProfileArgs struct {
-	Filename string `json:"filename"`
-}
-
 // MemoryProfileReply are the results from calling MemoryProfile
 type MemoryProfileReply struct {
 	Success bool `json:"success"`
 }
 
 // MemoryProfile runs a memory profile writing to the specified file
-func (service *Admin) MemoryProfile(_ *http.Request, args *MemoryProfileArgs, reply *MemoryProfileReply) error {
-	service.log.Info("Admin: MemoryProfile called with %s", args.Filename)
+func (service *Admin) MemoryProfile(_ *http.Request, args *struct{}, reply *MemoryProfileReply) error {
+	service.log.Info("Admin: MemoryProfile called")
 	reply.Success = true
-	return service.performance.MemoryProfile(args.Filename)
-}
-
-// LockProfileArgs are the arguments for calling LockProfile
-type LockProfileArgs struct {
-	Filename string `json:"filename"`
+	return service.performance.MemoryProfile()
 }
 
 // LockProfileReply are the results from calling LockProfile
@@ -96,10 +81,10 @@ type LockProfileReply struct {
 }
 
 // LockProfile runs a mutex profile writing to the specified file
-func (service *Admin) LockProfile(_ *http.Request, args *LockProfileArgs, reply *LockProfileReply) error {
-	service.log.Info("Admin: LockProfile called with %s", args.Filename)
+func (service *Admin) LockProfile(_ *http.Request, args *struct{}, reply *LockProfileReply) error {
+	service.log.Info("Admin: LockProfile called")
 	reply.Success = true
-	return service.performance.LockProfile(args.Filename)
+	return service.performance.LockProfile()
 }
 
 // AliasArgs are the arguments for calling Alias