diff --git a/cmd/warc/cmd/root.go b/cmd/warc/cmd/root.go
index 6cd5ddc..c9aa72e 100644
--- a/cmd/warc/cmd/root.go
+++ b/cmd/warc/cmd/root.go
@@ -17,8 +17,6 @@ package cmd
 
 import (
 	"fmt"
-	"runtime"
-
 	"github.com/fsnotify/fsnotify"
 	"github.com/nlnwa/gowarc/cmd/warc/cmd/cat"
 	"github.com/nlnwa/gowarc/cmd/warc/cmd/index"
@@ -27,6 +25,7 @@ import (
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
+	"strings"
 )
 
 type conf struct {
@@ -41,16 +40,7 @@ func NewCommand() *cobra.Command {
 		Use:   "warc",
 		Short: "A tool for handling warc files",
 		Long:  ``,
-
 		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
-			// Increase GOMAXPROCS as recommended by badger
-			// https://github.com/dgraph-io/badger#are-there-any-go-specific-settings-that-i-should-use
-			runtime.GOMAXPROCS(128)
-
-			if c.logLevel == "" {
-				c.logLevel = viper.GetString("loglevel")
-			}
-
 			level, err := log.ParseLevel(c.logLevel)
 			if err != nil {
 				return fmt.Errorf("'%s' is not part of the valid levels: 'panic', 'fatal', 'error', 'warn', 'warning', 'info', 'debug', 'trace'", c.logLevel)
@@ -63,10 +53,13 @@ func NewCommand() *cobra.Command {
 
 	cobra.OnInitialize(func() { c.initConfig() })
 
+
 	// Flags
-	cmd.PersistentFlags().StringVarP(&c.logLevel, "log-level", "l", "", "set the log level of gowarc, it will take precedence over config 'loglevel'")
-	cmd.PersistentFlags().StringVar(&c.cfgFile, "config", "", "config file. If not set, /etc/warc/, $HOME/.warc/ and current working dir will be searched for file config.yaml")
-	viper.BindPFlag("config", cmd.PersistentFlags().Lookup("config"))
+	cmd.PersistentFlags().StringVarP(&c.logLevel, "log-level", "l", "info", "fatal, error, warn, info, debug or trace")
+	cmd.PersistentFlags().StringVar(&c.cfgFile, "config", "c", "config file. If not set, /etc/warc/, $HOME/.warc/ and current working dir will be searched for file config.yaml")
+	if err := viper.BindPFlags(cmd.PersistentFlags()); err != nil {
+		log.Fatalf("Failed to bind serve flags: %v", err)
+	}
 
 	// Subcommands
 	cmd.AddCommand(ls.NewCommand())
@@ -80,14 +73,9 @@ func NewCommand() *cobra.Command {
 // initConfig reads in config file and ENV variables if set.
 func (c *conf) initConfig() {
 	viper.SetTypeByDefaultValue(true)
-	viper.SetDefault("warcdir", []string{"."})
-	viper.SetDefault("indexdir", ".")
-	viper.SetDefault("autoindex", true)
-	viper.SetDefault("warcport", 9999)
-	viper.SetDefault("loglevel", "info")
 
 	viper.AutomaticEnv() // read in environment variables that match
-
+	viper.EnvKeyReplacer(strings.NewReplacer("-", "_"))
 	if viper.IsSet("config") {
 		// Use config file from the flag.
 		viper.SetConfigFile(viper.GetString("config"))
@@ -110,7 +98,7 @@ func (c *conf) initConfig() {
 			// Config file not found; ignore error
 		} else {
 			// Config file was found but another error was produced
-			log.Fatalf("error reading config file: %v", err)
+			log.Fatalf("Failed to read config file: %v", err)
 		}
 	}
 
diff --git a/cmd/warc/cmd/serve/serve.go b/cmd/warc/cmd/serve/serve.go
index 35402d4..cb4d79a 100644
--- a/cmd/warc/cmd/serve/serve.go
+++ b/cmd/warc/cmd/serve/serve.go
@@ -16,60 +16,94 @@
 package serve
 
 import (
+	"context"
+	"fmt"
+	"github.com/gorilla/handlers"
 	"github.com/nlnwa/gowarc/pkg/index"
 	"github.com/nlnwa/gowarc/pkg/server"
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
+	"net/http"
+	"os"
+	"os/signal"
+	"runtime"
+	"syscall"
+	"time"
 )
 
-type conf struct {
-	port       int
-	warcDirs   []string
-	watchDepth int
-}
-
 func NewCommand() *cobra.Command {
-	c := &conf{}
-	var cmd = &cobra.Command{
+	cmd := &cobra.Command{
 		Use:   "serve",
 		Short: "Start the warc server to serve warc records",
 		Long:  ``,
+		PersistentPreRun: func(cmd *cobra.Command, args []string) {
+			// Increase GOMAXPROCS as recommended by badger
+			// https://github.com/dgraph-io/badger#are-there-any-go-specific-settings-that-i-should-use
+			runtime.GOMAXPROCS(128)
+		},
 		RunE: func(cmd *cobra.Command, args []string) error {
 			if len(args) > 0 {
-				c.warcDirs = args
-			} else {
-				c.warcDirs = viper.GetStringSlice("warcdir")
+				viper.Set("warc-dir", args)
 			}
-			return runE(c)
+			return runE()
 		},
 	}
 
-	cmd.Flags().IntVarP(&c.port, "port", "p", -1, "the port that should be used to serve, will use config value otherwise")
-	cmd.Flags().IntVarP(&c.watchDepth, "watch-depth", "w", 4, "The maximum depth when indexing warc")
+	cmd.Flags().IntP("port", "p", 9999, "Server listening port")
+	cmd.Flags().StringP("path-prefix", "", "/", "Path prefix")
+	cmd.Flags().IntP("watch-depth", "d", 4, "The maximum depth when indexing warc")
+	cmd.Flags().BoolP("auto-index", "", true, "Enable automatic indexing")
+
+	cmd.Flags().StringP("index-dir", "", ".", "Index directory")
+	cmd.Flags().StringSliceP("warc-dir", "", []string{"."}, "List of directories containing warcfiles")
+	cmd.Flags().StringP("cdx-cache-size", "", "", "Size of cdx index cache in bytes")
+	cmd.Flags().StringP("file-cache-size", "", "", "Size of file index cache in bytes")
+	cmd.Flags().StringP("id-cache-size", "", "", "Size of id index cache")
+	if err := viper.BindPFlags(cmd.Flags()); err != nil {
+		log.Fatalf("Failed to bind serve flags: %v", err)
+	}
 
 	return cmd
 }
 
-func runE(c *conf) error {
-	if c.port < 0 {
-		c.port = viper.GetInt("warcport")
-	}
+func runE() error {
+	opts := index.DefaultOptions().
+		WithDir(viper.GetString("index-dir")).
+		WithIdCacheSize(int64(viper.GetSizeInBytes("id-cache-size"))).
+		WithFileCacheSize(int64(viper.GetSizeInBytes("file-cache-size"))).
+		WithCdxCacheSize(int64(viper.GetSizeInBytes("cdx-cache-size")))
 
-	dbDir := viper.GetString("indexdir")
-	db, err := index.NewIndexDb(dbDir)
+	db, err := index.NewIndexDb(opts)
 	if err != nil {
 		log.Fatal(err)
 	}
 	defer db.Close()
 
-	if viper.GetBool("autoindex") {
+	if viper.GetBool("auto-index") {
 		log.Infof("Starting autoindexer")
-		autoindexer := index.NewAutoIndexer(db, c.warcDirs, c.watchDepth)
+		autoindexer := index.NewAutoIndexer(db, viper.GetStringSlice("warc-dir"), viper.GetInt("watch-depth"))
 		defer autoindexer.Shutdown()
 	}
 
-	log.Infof("Starting web server at http://localhost:%v", c.port)
-	server.Serve(db, c.port)
-	return nil
+	loggingMw := func(h http.Handler) http.Handler {
+		return handlers.CombinedLoggingHandler(os.Stdout, h)
+	}
+	server.Handler(db, loggingMw)
+
+	httpServer := &http.Server{
+		Addr: fmt.Sprintf(":%v", viper.GetString("port")),
+	}
+
+	sigs := make(chan os.Signal, 1)
+	signal.Notify(sigs, os.Interrupt, syscall.SIGTERM)
+	go func() {
+		<-sigs
+		ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+		defer cancel()
+		_ = httpServer.Shutdown(ctx)
+	}()
+
+	log.Infof("Starting web server at http://localhost:%v", viper.GetInt("port"))
+	return httpServer.ListenAndServe()
 }
diff --git a/go.mod b/go.mod
index 1a8a627..4e9fea8 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/nlnwa/gowarc
 go 1.13
 
 require (
-	github.com/dgraph-io/badger/v2 v2.0.2
+	github.com/dgraph-io/badger/v2 v2.2007.2
 	github.com/fsnotify/fsnotify v1.4.7
 	github.com/golang/protobuf v1.4.0-rc.4
 	github.com/gorilla/handlers v1.4.2
diff --git a/go.sum b/go.sum
index e013b82..b62615e 100644
--- a/go.sum
+++ b/go.sum
@@ -25,8 +25,12 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgraph-io/badger/v2 v2.0.2 h1:uBAA5oM9Gz9TrP01v9LxBGztE5rhtGeBxpF1IvxGGtw=
 github.com/dgraph-io/badger/v2 v2.0.2/go.mod h1:3KY8+bsP8wI0OEnQJAKpd4wIJW/Mm32yw2j/9FUVnIM=
+github.com/dgraph-io/badger/v2 v2.2007.2 h1:EjjK0KqwaFMlPin1ajhP943VPENHJdEz1KLIegjaI3k=
+github.com/dgraph-io/badger/v2 v2.2007.2/go.mod h1:26P/7fbL4kUZVEVKLAKXkBXKOydDmM2p1e+NhhnBCAE=
 github.com/dgraph-io/ristretto v0.0.2-0.20200115201040-8f368f2f2ab3 h1:MQLRM35Pp0yAyBYksjbj1nZI/w6eyRY/mWoM1sFf4kU=
 github.com/dgraph-io/ristretto v0.0.2-0.20200115201040-8f368f2f2ab3/go.mod h1:KPxhHT9ZxKefz+PCeOGsrHpl1qZ7i70dGTu2u+Ahh6E=
+github.com/dgraph-io/ristretto v0.0.3-0.20200630154024-f66de99634de h1:t0UHb5vdojIDUqktM6+xJAfScFBsVpXZmqC9dsgJmeA=
+github.com/dgraph-io/ristretto v0.0.3-0.20200630154024-f66de99634de/go.mod h1:KPxhHT9ZxKefz+PCeOGsrHpl1qZ7i70dGTu2u+Ahh6E=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2 h1:tdlZCpZ/P9DhczCTSixgIKmwPv6+wP5DGjqLYw5SUiA=
 github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
diff --git a/k8s/overlays/prod/config.yaml b/k8s/overlays/prod/config.yaml
new file mode 100644
index 0000000..0fb9f61
--- /dev/null
+++ b/k8s/overlays/prod/config.yaml
@@ -0,0 +1,5 @@
+autoindex: true
+indexdir: /warcindex
+warcdir:
+  - /warcfiles
+loglevel: info
diff --git a/k8s/overlays/prod/deployment_volume_patch.yaml b/k8s/overlays/prod/deployment_volume_patch.yaml
new file mode 100644
index 0000000..ff27888
--- /dev/null
+++ b/k8s/overlays/prod/deployment_volume_patch.yaml
@@ -0,0 +1,32 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: gowarc-server
+spec:
+  template:
+    spec:
+      containers:
+        - name: gowarc-server
+          resources:
+            limits:
+              memory: 30Gi
+          volumeMounts:
+            - mountPath: /etc/warc
+              name: gowarc-config
+            - mountPath: /warcindex
+              name: warcindex
+              subPath: nettaviser/nettaviser_2020
+            - mountPath: /warcfiles
+              name: warcfiles
+              subPath: veidemann/validwarcs/nettaviser/nettaviser_2020
+      volumes:
+        - name: gowarc-config
+          configMap:
+            name: gowarc-config
+        - name: warcindex
+          persistentVolumeClaim:
+            claimName: loke-b11
+        - name: warcfiles
+          persistentVolumeClaim:
+            claimName: nettarkivet-0
+            readOnly: true
diff --git a/k8s/overlays/prod/kustomization.yaml b/k8s/overlays/prod/kustomization.yaml
new file mode 100644
index 0000000..9bfa55f
--- /dev/null
+++ b/k8s/overlays/prod/kustomization.yaml
@@ -0,0 +1,17 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+namespace: nettarkivet
+namePrefix: "loke-"
+nameSuffix: "-nettaviser"
+
+resources:
+  - ../../base
+
+configMapGenerator:
+  - name: gowarc-config
+    files:
+      - config.yaml
+
+patchesStrategicMerge:
+  - deployment_volume_patch.yaml
diff --git a/pkg/index/db.go b/pkg/index/db.go
index 1efda68..eac4fe3 100644
--- a/pkg/index/db.go
+++ b/pkg/index/db.go
@@ -46,6 +46,11 @@ type Db struct {
 	cdxIndex     *badger.DB
 	dbGcInterval *time.Ticker
 
+	// cache settings
+	fileIndexCacheSize int64
+	cdxIndexCacheSize int64
+	idIndexCacheSize int64
+
 	// batch settings
 	batchMaxSize int
 	batchMaxWait time.Duration
@@ -55,8 +60,8 @@ type Db struct {
 	batchFlushChan chan []*record
 }
 
-func NewIndexDb(dbDir string) (*Db, error) {
-	dbDir = path.Join(dbDir, "warcdb")
+func NewIndexDb(opts Options) (*Db, error) {
+	dbDir := path.Join(opts.Dir, "warcdb")
 	idIndexDir := path.Join(dbDir, "id-index")
 	fileIndexDir := path.Join(dbDir, "file-index")
 	cdxIndexDir := path.Join(dbDir, "cdx-index")
@@ -93,17 +98,17 @@ func NewIndexDb(dbDir string) (*Db, error) {
 	// Open db
 	var err error
 
-	d.idIndex, err = openIndex(idIndexDir)
+	d.idIndex, err = openIndex(idIndexDir, opts.IdCacheSize)
 	if err != nil {
 		return nil, err
 	}
 
-	d.fileIndex, err = openIndex(fileIndexDir)
+	d.fileIndex, err = openIndex(fileIndexDir, opts.FileCacheSize)
 	if err != nil {
 		return nil, err
 	}
 
-	d.cdxIndex, err = openIndex(cdxIndexDir)
+	d.cdxIndex, err = openIndex(cdxIndexDir, opts.CdxCacheSize)
 	if err != nil {
 		return nil, err
 	}
@@ -117,11 +122,11 @@ func NewIndexDb(dbDir string) (*Db, error) {
 	return d, nil
 }
 
-func openIndex(indexDir string) (db *badger.DB, err error) {
-	if err := os.MkdirAll(indexDir, 0777); err != nil {
+func openIndex(dir string, cacheSize int64) (db *badger.DB, err error) {
+	if err := os.MkdirAll(dir, 0777); err != nil {
 		return nil, err
 	}
-	opts := badger.DefaultOptions(indexDir)
+	opts := badger.DefaultOptions(dir).WithIndexCacheSize(cacheSize)
 	opts.Logger = log.StandardLogger()
 	db, err = badger.Open(opts)
 	return
@@ -221,12 +226,18 @@ func (d *Db) UpdateFilePath(filePath string) {
 }
 
 func (d *Db) AddBatch(records []*record) {
-	log.Debugf("flushing batch to DB")
+	log.Debug("Flushing batch to DB")
 
 	var err error
 
 	err = d.idIndex.Update(func(txn *badger.Txn) error {
 		for _, r := range records {
+			if r == nil {
+				log.Warn("Record is nil")
+				continue
+			} else if r.filePath == "" {
+				log.Warn("Empty filepath")
+			}
 			r.filePath, err = filepath.Abs(r.filePath)
 			if err != nil {
 				log.Errorf("%v", err)
@@ -274,10 +285,7 @@ func (d *Db) Flush() {
 		return
 	}
 
-	copiedItems := make([]*record, len(d.batchItems))
-	for idx, i := range d.batchItems {
-		copiedItems[idx] = i
-	}
+	copiedItems := d.batchItems
 	d.batchItems = d.batchItems[:0]
 	d.batchFlushChan <- copiedItems
 }
diff --git a/pkg/index/indexworker.go b/pkg/index/indexworker.go
index 25dcf1f..fda6408 100644
--- a/pkg/index/indexworker.go
+++ b/pkg/index/indexworker.go
@@ -102,7 +102,7 @@ func indexFile(db *Db, fileName string) {
 	// Check if file is indexed and has not changed since indexing
 	stat, err := os.Stat(fileName)
 	if err != nil {
-		log.Errorf("%v", err)
+		log.Errorf("Failed to stat file %v: %v", fileName, err)
 	}
 
 	fileSize := stat.Size()
@@ -111,7 +111,7 @@ func indexFile(db *Db, fileName string) {
 	if fileInfo, err := db.GetFilePath(fn); err == nil {
 		fileInfoLastModified, err := ptypes.Timestamp(fileInfo.LastModified)
 		if err != nil {
-			log.Errorf("%v", err)
+			log.Errorf("Failed to convert timestamp: %v", err)
 		}
 		if fileInfo.Size == fileSize && fileInfoLastModified.Equal(fileLastModified) {
 			log.Debugf("Already indexed %v", fileName)
diff --git a/pkg/index/indexwriter.go b/pkg/index/indexwriter.go
index 6021016..fc6a308 100644
--- a/pkg/index/indexwriter.go
+++ b/pkg/index/indexwriter.go
@@ -22,7 +22,6 @@ import (
 	"github.com/golang/protobuf/jsonpb"
 	"github.com/golang/protobuf/proto"
 	"github.com/nlnwa/gowarc/warcrecord"
-	"github.com/spf13/viper"
 )
 
 type CdxWriter interface {
@@ -44,8 +43,7 @@ type CdxDb struct {
 }
 
 func (c *CdxDb) Init() (err error) {
-	dbDir := viper.GetString("indexdir")
-	c.db, err = NewIndexDb(dbDir)
+	c.db, err = NewIndexDb(DefaultOptions())
 	if err != nil {
 		return err
 	}
diff --git a/pkg/index/options.go b/pkg/index/options.go
new file mode 100644
index 0000000..d409308
--- /dev/null
+++ b/pkg/index/options.go
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2020 National Library of Norway.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package index
+
+type Options struct {
+	Dir string
+	FileCacheSize int64
+	IdCacheSize int64
+	CdxCacheSize int64
+}
+
+func DefaultOptions() Options {
+	return Options{
+		Dir: "",
+		FileCacheSize: 0,
+		IdCacheSize: 0,
+		CdxCacheSize: 0,
+	}
+}
+
+func (opt Options) WithDir(val string) Options {
+	opt.Dir = val
+	return opt
+}
+func (opt Options) WithFileCacheSize(val int64) Options {
+	opt.FileCacheSize = val
+	return opt
+}
+func (opt Options) WithIdCacheSize(val int64) Options {
+	opt.IdCacheSize = val
+	return opt
+}
+func (opt Options) WithCdxCacheSize(val int64) Options {
+	opt.CdxCacheSize = val
+	return opt
+}
diff --git a/pkg/server/server.go b/pkg/server/server.go
index f40578f..f2b0f5f 100644
--- a/pkg/server/server.go
+++ b/pkg/server/server.go
@@ -17,24 +17,14 @@
 package server
 
 import (
-	"context"
-	"fmt"
-	"net/http"
-	"os"
-	"os/signal"
-	"strconv"
-	"syscall"
-	"time"
-
-	"github.com/gorilla/handlers"
 	"github.com/gorilla/mux"
 	"github.com/nlnwa/gowarc/pkg/index"
 	"github.com/nlnwa/gowarc/pkg/loader"
 	"github.com/nlnwa/gowarc/pkg/server/warcserver"
-	log "github.com/sirupsen/logrus"
+	"net/http"
 )
 
-func Serve(db *index.Db, port int) {
+func Handler(db *index.Db, middlewares ...func (http.Handler) http.Handler) http.Handler {
 	l := &loader.Loader{
 		Resolver: &storageRefResolver{db: db},
 		Loader: &loader.FileStorageLoader{FilePathResolver: func(fileName string) (filePath string, err error) {
@@ -50,28 +40,12 @@ func Serve(db *index.Db, port int) {
 	r.Handle("/search", &searchHandler{l, db})
 	warcserverRoutes := r.PathPrefix("/warcserver").Subrouter()
 	warcserver.RegisterRoutes(warcserverRoutes, db, l)
-	http.Handle("/", r)
 
-	loggingMw := func(h http.Handler) http.Handler {
-		return handlers.CombinedLoggingHandler(os.Stdout, h)
+	for _, middleware := range middlewares {
+		r.Use(middleware)
 	}
-	r.Use(loggingMw)
-
-	portStr := strconv.Itoa(port)
-	httpServer := &http.Server{
-		Addr: fmt.Sprintf(":%v", portStr),
-	}
-
-	sigs := make(chan os.Signal, 1)
-	signal.Notify(sigs, os.Interrupt, syscall.SIGTERM)
-	go func() {
-		<-sigs
-		ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-		defer cancel()
-		httpServer.Shutdown(ctx)
-	}()
 
-	log.Info(httpServer.ListenAndServe())
+	return r
 }
 
 type storageRefResolver struct {