diff --git a/cmd/influx_inspect/dumptsi/dumptsi.go b/cmd/influx_inspect/dumptsi/dumptsi.go
index 04eda19d11..0321f49369 100644
--- a/cmd/influx_inspect/dumptsi/dumptsi.go
+++ b/cmd/influx_inspect/dumptsi/dumptsi.go
@@ -11,6 +11,7 @@ import (
 	"regexp"
 	"text/tabwriter"
 
+	"github.com/influxdata/influxdb/logger"
 	"github.com/influxdata/influxdb/models"
 	"github.com/influxdata/influxdb/tsdb"
 	"github.com/influxdata/influxdb/tsdb/index/tsi1"
@@ -114,6 +115,7 @@ func (cmd *Command) Run(args ...string) error {
 
 func (cmd *Command) run() error {
 	sfile := tsdb.NewSeriesFile(cmd.seriesFilePath)
+	sfile.Logger = logger.New(os.Stderr)
 	if err := sfile.Open(); err != nil {
 		return err
 	}
diff --git a/cmd/influx_inspect/inmem2tsi/inmem2tsi.go b/cmd/influx_inspect/inmem2tsi/inmem2tsi.go
index 299744f480..d3e503a930 100644
--- a/cmd/influx_inspect/inmem2tsi/inmem2tsi.go
+++ b/cmd/influx_inspect/inmem2tsi/inmem2tsi.go
@@ -10,7 +10,6 @@ import (
 	"os"
 	"path/filepath"
 
-	"github.com/influxdata/influxdb/logger"
 	"github.com/influxdata/influxdb/models"
 	"github.com/influxdata/influxdb/tsdb"
 	"github.com/influxdata/influxdb/tsdb/engine/tsm1"
@@ -55,6 +54,7 @@ func (cmd *Command) Run(args ...string) error {
 
 func (cmd *Command) run(seriesFilePath, dataDir, walDir string) error {
 	sfile := tsdb.NewSeriesFile(seriesFilePath)
+	sfile.Logger = cmd.Logger
 	if err := sfile.Open(); err != nil {
 		return err
 	}
diff --git a/tsdb/engine/tsm1/engine_test.go b/tsdb/engine/tsm1/engine_test.go
index d845df1a50..42dc2c1be7 100644
--- a/tsdb/engine/tsm1/engine_test.go
+++ b/tsdb/engine/tsm1/engine_test.go
@@ -20,6 +20,7 @@ import (
 	"time"
 
 	"github.com/google/go-cmp/cmp"
+	"github.com/influxdata/influxdb/logger"
 	"github.com/influxdata/influxdb/models"
 	"github.com/influxdata/influxdb/pkg/deep"
 	"github.com/influxdata/influxdb/query"
@@ -1690,6 +1691,7 @@ func NewEngine(index string) (*Engine, error) {
 	}
 
 	sfile := tsdb.NewSeriesFile(seriesPath)
+	sfile.Logger = logger.New(os.Stdout)
 	if err = sfile.Open(); err != nil {
 		return nil, err
 	}
diff --git a/tsdb/series_file.go b/tsdb/series_file.go
index 2cdda8115c..bfa994cbbd 100644
--- a/tsdb/series_file.go
+++ b/tsdb/series_file.go
@@ -10,33 +10,44 @@ import (
 	"os"
 	"path/filepath"
 	"sync"
+	"time"
 
 	"github.com/cespare/xxhash"
 	"github.com/influxdata/influxdb/models"
 	"github.com/influxdata/influxdb/pkg/rhh"
+	"go.uber.org/zap"
 )
 
 // SeriesIDSize is the size in bytes of a series key ID.
 const SeriesIDSize = 8
 
-// SeriesMapThreshold is the number of series IDs to hold in the in-memory
+// DefaultSeriesFileCompactThreshold is the number of series IDs to hold in the in-memory
 // series map before compacting and rebuilding the on-disk representation.
-const SeriesMapThreshold = 1 << 25 // ~33M ids * 8 bytes per id == 256MB
+const DefaultSeriesFileCompactThreshold = 1 << 20 // 1M
 
 // SeriesFile represents the section of the index that holds series data.
 type SeriesFile struct {
 	mu   sync.RWMutex
+	wg   sync.WaitGroup
 	path string
 
 	segments []*SeriesSegment
 	index    *SeriesIndex
 	seq      uint64 // series id sequence
+
+	compacting bool
+
+	CompactThreshold int
+
+	Logger *zap.Logger
 }
 
 // NewSeriesFile returns a new instance of SeriesFile.
 func NewSeriesFile(path string) *SeriesFile {
 	return &SeriesFile{
-		path: path,
+		path:             path,
+		CompactThreshold: DefaultSeriesFileCompactThreshold,
+		Logger:           zap.NewNop(),
 	}
 }
 
@@ -61,10 +72,10 @@ func (f *SeriesFile) Open() error {
 		f.index = NewSeriesIndex(f.IndexPath())
 		if err := f.index.Open(); err != nil {
 			return err
+		} else if f.index.Recover(f.segments); err != nil {
+			return err
 		}
 
-		// TODO: Replay new entries since index was built.
-
 		return nil
 	}(); err != nil {
 		f.Close()
@@ -113,6 +124,8 @@ func (f *SeriesFile) openSegments() error {
 
 // Close unmaps the data file.
 func (f *SeriesFile) Close() (err error) {
+	f.wg.Wait()
+
 	f.mu.Lock()
 	defer f.mu.Unlock()
 
@@ -202,6 +215,30 @@ func (f *SeriesFile) CreateSeriesListIfNotExists(names [][]byte, tagsSlice []mod
 		f.index.Insert(f.seriesKeyByOffset(keyRange.offset), keyRange.id, keyRange.offset)
 	}
 
+	// Check if we've crossed the compaction threshold.
+	if !f.compacting && f.CompactThreshold != 0 && f.index.InMemCount() >= uint64(f.CompactThreshold) {
+		f.compacting = true
+		logger := f.Logger.With(zap.String("path", f.path))
+		logger.Info("beginning series file compaction")
+
+		startTime := time.Now()
+		f.wg.Add(1)
+		go func() {
+			defer f.wg.Done()
+
+			if err := NewSeriesFileCompactor().Compact(f); err != nil {
+				logger.With(zap.Error(err)).Error("series file compaction failed")
+			}
+
+			logger.With(zap.Duration("elapsed", time.Since(startTime))).Info("completed series file compaction")
+
+			// Clear compaction flag.
+			f.mu.Lock()
+			f.compacting = false
+			f.mu.Unlock()
+		}()
+	}
+
 	return ids, nil
 }
 
diff --git a/tsdb/series_file_test.go b/tsdb/series_file_test.go
index b4386645f7..81b20933ac 100644
--- a/tsdb/series_file_test.go
+++ b/tsdb/series_file_test.go
@@ -6,6 +6,7 @@ import (
 	"os"
 	"testing"
 
+	"github.com/influxdata/influxdb/logger"
 	"github.com/influxdata/influxdb/models"
 	"github.com/influxdata/influxdb/tsdb"
 )
@@ -47,6 +48,7 @@ func TestSeriesFile_Series(t *testing.T) {
 // Ensure series file can be compacted.
 func TestSeriesFileCompactor(t *testing.T) {
 	sfile := MustOpenSeriesFile()
+	sfile.CompactThreshold = 0
 	defer sfile.Close()
 
 	var names [][]byte
@@ -102,6 +104,7 @@ func NewSeriesFile() *SeriesFile {
 // MustOpenSeriesFile returns a new, open instance of SeriesFile. Panic on error.
 func MustOpenSeriesFile() *SeriesFile {
 	f := NewSeriesFile()
+	f.Logger = logger.New(os.Stdout)
 	if err := f.Open(); err != nil {
 		panic(err)
 	}
diff --git a/tsdb/series_index.go b/tsdb/series_index.go
index c803cf0db0..078d0f1776 100644
--- a/tsdb/series_index.go
+++ b/tsdb/series_index.go
@@ -135,9 +135,15 @@ func (idx *SeriesIndex) Recover(segments []*SeriesSegment) error {
 
 // Count returns the number of series in the index.
 func (idx *SeriesIndex) Count() uint64 {
-	return idx.count + uint64(len(idx.idOffsetMap))
+	return idx.OnDiskCount() + idx.InMemCount()
 }
 
+// OnDiskCount returns the number of series in the on-disk index.
+func (idx *SeriesIndex) OnDiskCount() uint64 { return idx.count }
+
+// InMemCount returns the number of series in the in-memory index.
+func (idx *SeriesIndex) InMemCount() uint64 { return uint64(len(idx.idOffsetMap)) }
+
 func (idx *SeriesIndex) Insert(key []byte, id uint64, offset int64) {
 	idx.execEntry(SeriesEntryInsertFlag, id, offset, key)
 }
diff --git a/tsdb/series_segment.go b/tsdb/series_segment.go
index a9600a26d1..7f80afffc8 100644
--- a/tsdb/series_segment.go
+++ b/tsdb/series_segment.go
@@ -7,7 +7,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"regexp"
 	"strconv"
@@ -59,7 +58,7 @@ func NewSeriesSegment(id uint16, path string) *SeriesSegment {
 // CreateSeriesSegment generates an empty segment at path.
 func CreateSeriesSegment(id uint16, path string) (*SeriesSegment, error) {
 	// Generate segment in temp location.
-	f, err := ioutil.TempFile("", "series-segment-")
+	f, err := os.Create(path + ".initializing")
 	if err != nil {
 		return nil, err
 	}
diff --git a/tsdb/shard_internal_test.go b/tsdb/shard_internal_test.go
index 1da93603e4..d0e9c0fefc 100644
--- a/tsdb/shard_internal_test.go
+++ b/tsdb/shard_internal_test.go
@@ -14,6 +14,7 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	"github.com/google/go-cmp/cmp/cmpopts"
+	"github.com/influxdata/influxdb/logger"
 	"github.com/influxdata/influxdb/models"
 	"github.com/influxdata/influxql"
 )
@@ -221,6 +222,7 @@ func NewTempShard(index string) *TempShard {
 
 	// Create series file.
 	sfile := NewSeriesFile(filepath.Join(dir, "db0", SeriesFileName))
+	sfile.Logger = logger.New(os.Stdout)
 	if err := sfile.Open(); err != nil {
 		panic(err)
 	}
diff --git a/tsdb/store.go b/tsdb/store.go
index fad24f5e77..7373255f10 100644
--- a/tsdb/store.go
+++ b/tsdb/store.go
@@ -354,6 +354,7 @@ func (s *Store) openSeriesFile(database string) (*SeriesFile, error) {
 	}
 
 	sfile := NewSeriesFile(filepath.Join(s.path, database, SeriesFileName))
+	sfile.Logger = s.baseLogger
 	if err := sfile.Open(); err != nil {
 		return nil, err
 	}
diff --git a/tsdb/store_test.go b/tsdb/store_test.go
index 58202b969f..ed3ee0ce10 100644
--- a/tsdb/store_test.go
+++ b/tsdb/store_test.go
@@ -11,7 +11,6 @@ import (
 	"path/filepath"
 	"reflect"
 	"regexp"
-	"runtime"
 	"sort"
 	"strings"
 	"testing"
@@ -1514,11 +1513,6 @@ func NewStore() *Store {
 		s.WithLogger(logger.New(os.Stdout))
 	}
 
-	if runtime.GOARCH == "386" {
-		// Set the mmap size to something addressable in the process.
-		s.SeriesFileMaxSize = 1 << 27 // 128MB
-	}
-
 	return s
 }
 
@@ -1540,12 +1534,8 @@ func (s *Store) Reopen() error {
 		return err
 	}
 
-	// Keep old max series file size.
-	seriesMapSize := s.Store.SeriesFileMaxSize
-
 	s.Store = tsdb.NewStore(s.Path())
 	s.EngineOptions.Config.WALDir = filepath.Join(s.Path(), "wal")
-	s.SeriesFileMaxSize = seriesMapSize
 	return s.Store.Open()
 }