fix typo in sample config and README

Closes #240

plugins/procstat/README.md

@@ -1,10 +1,15 @@
-# Procstat plugin
+# Telegraf plugin: procstat
+
+#### Description
 
 The procstat plugin can be used to monitor system resource usage by an
-individual process.
+individual process using their /proc data.
 
 Processes can be specified either by pid file or by executable name. Procstat
-plugin will use `pgrep` when executable name is provided to obtain the pid. Proctsta plugin will transmit IO, memory, cpu, file descriptor related measurements for every process specified. A prefix can be set to isolate individual process specific measurements.
+plugin will use `pgrep` when executable name is provided to obtain the pid.
+Proctsta plugin will transmit IO, memory, cpu, file descriptor related
+measurements for every process specified. A prefix can be set to isolate
+individual process specific measurements.
 
 Example:
 
@@ -19,3 +24,37 @@ Example:
   pid_file = "/var/run/lxc/dnsmasq.pid"
   prefix = "dnsmasq"
 ```
+
+# Measurements
+Note: prefix will set by the user, per process.
+
+File descriptor related measurement names:
+- procstat_prefix_num_fds value=4
+
+Context switch related measurement names:
+- procstat_prefix_voluntary_context_switches value=250
+- procstat_prefix_involuntary_context_switches value=0
+
+I/O related measurement names:
+- procstat_prefix_read_count value=396
+- procstat_prefix_write_count value=1
+- procstat_prefix_read_bytes value=1019904
+- procstat_prefix_write_bytes value=1
+
+CPU related measurement names:
+- procstat_prefix_cpu_user value=0
+- procstat_prefix_cpu_system value=0.01
+- procstat_prefix_cpu_idle value=0
+- procstat_prefix_cpu_nice value=0
+- procstat_prefix_cpu_iowait value=0
+- procstat_prefix_cpu_irq value=0
+- procstat_prefix_cpu_soft_irq value=0
+- procstat_prefix_cpu_soft_steal value=0
+- procstat_prefix_cpu_soft_stolen value=0
+- procstat_prefix_cpu_soft_guest value=0
+- procstat_prefix_cpu_soft_guest_nice value=0
+
+Memory related measurement names:
+- procstat_prefix_memory_rss value=1777664
+- procstat_prefix_memory_vms value=24227840
+- procstat_prefix_memory_swap value=282624

plugins/procstat/procstat.go

@@ -2,13 +2,15 @@ package procstat
 
 import (
 	"fmt"
-	"github.com/influxdb/telegraf/plugins"
-	"github.com/shirou/gopsutil/process"
 	"io/ioutil"
 	"os/exec"
 	"strconv"
 	"strings"
 	"sync"
+
+	"github.com/shirou/gopsutil/process"
+
+	"github.com/influxdb/telegraf/plugins"
 )
 
 type Specification struct {
@@ -26,12 +28,12 @@ func NewProcstat() *Procstat {
 }
 
 var sampleConfig = `
-  [[process.specifications]]
+	[[procstat.specifications]]
-	# pid file
+	prefix = "nginx" # required
-	pid_file = "/path/to/foo.pid"
+	# Use one of pid_file or exe to find process
+	pid_file = "/var/run/nginx.pid"
 	# executable name (used by pgrep)
-	exe = "/path/to/foo"
+	# exe = "nginx"
-	name = "foo" # required
 `
 
 func (_ *Procstat) SampleConfig() string {
@@ -39,7 +41,7 @@ func (_ *Procstat) SampleConfig() string {
 }
 
 func (_ *Procstat) Description() string {
-	return "Monitor  process cpu and memory usage"
+	return "Monitor process cpu and memory usage"
 }
 
 func (p *Procstat) Gather(acc plugins.Accumulator) error {

plugins/procstat/procstat_test.go

@@ -1,13 +1,15 @@
 package procstat
 
 import (
-	"github.com/influxdb/telegraf/testutil"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
 	"io/ioutil"
 	"os"
 	"strconv"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/influxdb/telegraf/testutil"
 )
 
 func TestGather(t *testing.T) {

plugins/procstat/spec_processor.go

@@ -2,8 +2,10 @@ package procstat
 
 import (
 	"fmt"
-	"github.com/influxdb/telegraf/plugins"
+
 	"github.com/shirou/gopsutil/process"
+
+	"github.com/influxdb/telegraf/plugins"
 )
 
 type SpecProcessor struct {