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renaming plugins -> inputs

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This commit is contained in:
Cameron Sparr
2016-01-07 13:39:43 -07:00
parent 30d24a3c1c
commit 9c5db1057d
175 changed files with 606 additions and 572 deletions
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227
plugins/inputs/zfs/README.md Normal file
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# Telegraf plugin: zfs
Get ZFS stat from /proc/spl/kstat/zfs
# Measurements
Meta:
- tags: `pools=POOL1::POOL2`
Measurement names:
- arcstats_hits
- arcstats_misses
- arcstats_demand_data_hits
- arcstats_demand_data_misses
- arcstats_demand_metadata_hits
- arcstats_demand_metadata_misses
- arcstats_prefetch_data_hits
- arcstats_prefetch_data_misses
- arcstats_prefetch_metadata_hits
- arcstats_prefetch_metadata_misses
- arcstats_mru_hits
- arcstats_mru_ghost_hits
- arcstats_mfu_hits
- arcstats_mfu_ghost_hits
- arcstats_deleted
- arcstats_recycle_miss
- arcstats_mutex_miss
- arcstats_evict_skip
- arcstats_evict_l2_cached
- arcstats_evict_l2_eligible
- arcstats_evict_l2_ineligible
- arcstats_hash_elements
- arcstats_hash_elements_max
- arcstats_hash_collisions
- arcstats_hash_chains
- arcstats_hash_chain_max
- arcstats_p
- arcstats_c
- arcstats_c_min
- arcstats_c_max
- arcstats_size
- arcstats_hdr_size
- arcstats_data_size
- arcstats_meta_size
- arcstats_other_size
- arcstats_anon_size
- arcstats_anon_evict_data
- arcstats_anon_evict_metadata
- arcstats_mru_size
- arcstats_mru_evict_data
- arcstats_mru_evict_metadata
- arcstats_mru_ghost_size
- arcstats_mru_ghost_evict_data
- arcstats_mru_ghost_evict_metadata
- arcstats_mfu_size
- arcstats_mfu_evict_data
- arcstats_mfu_evict_metadata
- arcstats_mfu_ghost_size
- arcstats_mfu_ghost_evict_data
- arcstats_mfu_ghost_evict_metadata
- arcstats_l2_hits
- arcstats_l2_misses
- arcstats_l2_feeds
- arcstats_l2_rw_clash
- arcstats_l2_read_bytes
- arcstats_l2_write_bytes
- arcstats_l2_writes_sent
- arcstats_l2_writes_done
- arcstats_l2_writes_error
- arcstats_l2_writes_hdr_miss
- arcstats_l2_evict_lock_retry
- arcstats_l2_evict_reading
- arcstats_l2_free_on_write
- arcstats_l2_cdata_free_on_write
- arcstats_l2_abort_lowmem
- arcstats_l2_cksum_bad
- arcstats_l2_io_error
- arcstats_l2_size
- arcstats_l2_asize
- arcstats_l2_hdr_size
- arcstats_l2_compress_successes
- arcstats_l2_compress_zeros
- arcstats_l2_compress_failures
- arcstats_memory_throttle_count
- arcstats_duplicate_buffers
- arcstats_duplicate_buffers_size
- arcstats_duplicate_reads
- arcstats_memory_direct_count
- arcstats_memory_indirect_count
- arcstats_arc_no_grow
- arcstats_arc_tempreserve
- arcstats_arc_loaned_bytes
- arcstats_arc_prune
- arcstats_arc_meta_used
- arcstats_arc_meta_limit
- arcstats_arc_meta_max
- zfetchstats_hits
- zfetchstats_misses
- zfetchstats_colinear_hits
- zfetchstats_colinear_misses
- zfetchstats_stride_hits
- zfetchstats_stride_misses
- zfetchstats_reclaim_successes
- zfetchstats_reclaim_failures
- zfetchstats_streams_resets
- zfetchstats_streams_noresets
- zfetchstats_bogus_streams
- vdev_cache_stats_delegations
- vdev_cache_stats_hits
- vdev_cache_stats_misses
### Description
```
arcstats_hits
Total amount of cache hits in the arc.
arcstats_misses
Total amount of cache misses in the arc.
arcstats_demand_data_hits
Amount of cache hits for demand data, this is what matters (is good) for your application/share.
arcstats_demand_data_misses
Amount of cache misses for demand data, this is what matters (is bad) for your application/share.
arcstats_demand_metadata_hits
Ammount of cache hits for demand metadata, this matters (is good) for getting filesystem data (ls,find,…)
arcstats_demand_metadata_misses
Ammount of cache misses for demand metadata, this matters (is bad) for getting filesystem data (ls,find,…)
arcstats_prefetch_data_hits
The zfs prefetcher tried to prefetch somethin, but it was allready cached (boring)
arcstats_prefetch_data_misses
The zfs prefetcher prefetched something which was not in the cache (good job, could become a demand hit in the future)
arcstats_prefetch_metadata_hits
Same as above, but for metadata
arcstats_prefetch_metadata_misses
Same as above, but for metadata
arcstats_mru_hits
Cache hit in the “most recently used cache”, we move this to the mfu cache.
arcstats_mru_ghost_hits
Cache hit in the “most recently used ghost list” we had this item in the cache, but evicted it, maybe we should increase the mru cache size.
arcstats_mfu_hits
Cache hit in the “most freqently used cache” we move this to the begining of the mfu cache.
arcstats_mfu_ghost_hits
Cache hit in the “most frequently used ghost list” we had this item in the cache, but evicted it, maybe we should increase the mfu cache size.
arcstats_allocated
New data is written to the cache.
arcstats_deleted
Old data is evicted (deleted) from the cache.
arcstats_evict_l2_cached
We evicted something from the arc, but its still cached in the l2 if we need it.
arcstats_evict_l2_eligible
We evicted something from the arc, and it’s not in the l2 this is sad. (maybe we hadn’t had enough time to store it there)
arcstats_evict_l2_ineligible
We evicted something which cannot be stored in the l2.
Reasons could be:
We have multiple pools, we evicted something from a pool whithot an l2 device.
The zfs property secondarycache.
arcstats_c
Arc target size, this is the size the system thinks the arc should have.
arcstats_size
Total size of the arc.
arcstats_l2_hits
Hits to the L2 cache. (It was not in the arc, but in the l2 cache)
arcstats_l2_misses
Miss to the L2 cache. (It was not in the arc, and not in the l2 cache)
arcstats_l2_size
Size of the l2 cache.
arcstats_l2_hdr_size
Size of the metadata in the arc (ram) used to manage (lookup if someting is in the l2) the l2 cache.
zfetchstats_hits
Counts the number of cache hits, to items wich are in the cache because of the prefetcher.
zfetchstats_colinear_hits
Counts the number of cache hits, to items wich are in the cache because of the prefetcher (prefetched linear reads)
zfetchstats_stride_hits
Counts the number of cache hits, to items wich are in the cache because of the prefetcher (prefetched stride reads)
vdev_cache_stats_hits
Hits to the vdev (device level) cache.
vdev_cache_stats_misses
Misses to the vdev (device level) cache.
```
# Default config
```
[zfs]
# ZFS kstat path
# If not specified, then default is:
# kstatPath = "/proc/spl/kstat/zfs"
#
# By default, telegraf gather all zfs stats
# If not specified, then default is:
# kstatMetrics = ["arcstats", "zfetchstats", "vdev_cache_stats"]
```

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plugins/inputs/zfs/zfs.go Normal file
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package zfs
import (
"fmt"
"path/filepath"
"strconv"
"strings"
"github.com/influxdb/telegraf/internal"
"github.com/influxdb/telegraf/plugins/inputs"
)
type Zfs struct {
KstatPath string
KstatMetrics []string
PoolMetrics bool
}
type poolInfo struct {
name string
ioFilename string
}
var sampleConfig = `
# ZFS kstat path
# If not specified, then default is:
# kstatPath = "/proc/spl/kstat/zfs"
#
# By default, telegraf gather all zfs stats
# If not specified, then default is:
# kstatMetrics = ["arcstats", "zfetchstats", "vdev_cache_stats"]
#
# By default, don't gather zpool stats
# poolMetrics = false
`
func (z *Zfs) SampleConfig() string {
return sampleConfig
}
func (z *Zfs) Description() string {
return "Read metrics of ZFS from arcstats, zfetchstats and vdev_cache_stats"
}
func getPools(kstatPath string) []poolInfo {
pools := make([]poolInfo, 0)
poolsDirs, _ := filepath.Glob(kstatPath + "/*/io")
for _, poolDir := range poolsDirs {
poolDirSplit := strings.Split(poolDir, "/")
pool := poolDirSplit[len(poolDirSplit)-2]
pools = append(pools, poolInfo{name: pool, ioFilename: poolDir})
}
return pools
}
func getTags(pools []poolInfo) map[string]string {
var poolNames string
for _, pool := range pools {
if len(poolNames) != 0 {
poolNames += "::"
}
poolNames += pool.name
}
return map[string]string{"pools": poolNames}
}
func gatherPoolStats(pool poolInfo, acc inputs.Accumulator) error {
lines, err := internal.ReadLines(pool.ioFilename)
if err != nil {
return err
}
if len(lines) != 3 {
return err
}
keys := strings.Fields(lines[1])
values := strings.Fields(lines[2])
keyCount := len(keys)
if keyCount != len(values) {
return fmt.Errorf("Key and value count don't match Keys:%v Values:%v", keys, values)
}
tag := map[string]string{"pool": pool.name}
fields := make(map[string]interface{})
for i := 0; i < keyCount; i++ {
value, err := strconv.ParseInt(values[i], 10, 64)
if err != nil {
return err
}
fields[keys[i]] = value
}
acc.AddFields("zfs_pool", fields, tag)
return nil
}
func (z *Zfs) Gather(acc inputs.Accumulator) error {
kstatMetrics := z.KstatMetrics
if len(kstatMetrics) == 0 {
kstatMetrics = []string{"arcstats", "zfetchstats", "vdev_cache_stats"}
}
kstatPath := z.KstatPath
if len(kstatPath) == 0 {
kstatPath = "/proc/spl/kstat/zfs"
}
pools := getPools(kstatPath)
tags := getTags(pools)
if z.PoolMetrics {
for _, pool := range pools {
err := gatherPoolStats(pool, acc)
if err != nil {
return err
}
}
}
fields := make(map[string]interface{})
for _, metric := range kstatMetrics {
lines, err := internal.ReadLines(kstatPath + "/" + metric)
if err != nil {
return err
}
for i, line := range lines {
if i == 0 || i == 1 {
continue
}
if len(line) < 1 {
continue
}
rawData := strings.Split(line, " ")
key := metric + "_" + rawData[0]
rawValue := rawData[len(rawData)-1]
value, _ := strconv.ParseInt(rawValue, 10, 64)
fields[key] = value
}
}
acc.AddFields("zfs", fields, tags)
return nil
}
func init() {
inputs.Add("zfs", func() inputs.Input {
return &Zfs{}
})
}

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plugins/inputs/zfs/zfs_test.go Normal file
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package zfs
import (
"io/ioutil"
"os"
"testing"
"github.com/influxdb/telegraf/testutil"
"github.com/stretchr/testify/require"
)
const arcstatsContents = `5 1 0x01 86 4128 23617128247 12081618582809582
name type data
hits 4 5968846374
misses 4 1659178751
demand_data_hits 4 4860247322
demand_data_misses 4 501499535
demand_metadata_hits 4 708608325
demand_metadata_misses 4 156591375
prefetch_data_hits 4 367047144
prefetch_data_misses 4 974529898
prefetch_metadata_hits 4 32943583
prefetch_metadata_misses 4 26557943
mru_hits 4 301176811
mru_ghost_hits 4 47066067
mfu_hits 4 5520612438
mfu_ghost_hits 4 45784009
deleted 4 1718937704
recycle_miss 4 481222994
mutex_miss 4 20575623
evict_skip 4 14655903906543
evict_l2_cached 4 145310202998272
evict_l2_eligible 4 16345402777088
evict_l2_ineligible 4 7437226893312
hash_elements 4 36617980
hash_elements_max 4 36618318
hash_collisions 4 554145157
hash_chains 4 4187651
hash_chain_max 4 26
p 4 13963222064
c 4 16381258376
c_min 4 4194304
c_max 4 16884125696
size 4 16319887096
hdr_size 4 42567864
data_size 4 60066304
meta_size 4 1701534208
other_size 4 1661543168
anon_size 4 94720
anon_evict_data 4 0
anon_evict_metadata 4 0
mru_size 4 973099008
mru_evict_data 4 9175040
mru_evict_metadata 4 32768
mru_ghost_size 4 32768
mru_ghost_evict_data 4 0
mru_ghost_evict_metadata 4 32768
mfu_size 4 788406784
mfu_evict_data 4 50881024
mfu_evict_metadata 4 81920
mfu_ghost_size 4 0
mfu_ghost_evict_data 4 0
mfu_ghost_evict_metadata 4 0
l2_hits 4 573868618
l2_misses 4 1085309718
l2_feeds 4 12182087
l2_rw_clash 4 9610
l2_read_bytes 4 32695938336768
l2_write_bytes 4 2826774778880
l2_writes_sent 4 4267687
l2_writes_done 4 4267687
l2_writes_error 4 0
l2_writes_hdr_miss 4 164
l2_evict_lock_retry 4 5
l2_evict_reading 4 0
l2_free_on_write 4 1606914
l2_cdata_free_on_write 4 1775
l2_abort_lowmem 4 83462
l2_cksum_bad 4 393860640
l2_io_error 4 53881460
l2_size 4 2471466648576
l2_asize 4 2461690072064
l2_hdr_size 4 12854175552
l2_compress_successes 4 12184849
l2_compress_zeros 4 0
l2_compress_failures 4 0
memory_throttle_count 4 0
duplicate_buffers 4 0
duplicate_buffers_size 4 0
duplicate_reads 4 0
memory_direct_count 4 5159942
memory_indirect_count 4 3034640
arc_no_grow 4 0
arc_tempreserve 4 0
arc_loaned_bytes 4 0
arc_prune 4 114554259559
arc_meta_used 4 16259820792
arc_meta_limit 4 12663094272
arc_meta_max 4 18327165696
`
const zfetchstatsContents = `3 1 0x01 11 528 23607270446 12081656848148208
name type data
hits 4 7812959060
misses 4 4154484207
colinear_hits 4 1366368
colinear_misses 4 4153117839
stride_hits 4 7309776732
stride_misses 4 222766182
reclaim_successes 4 107788388
reclaim_failures 4 4045329451
streams_resets 4 20989756
streams_noresets 4 503182328
bogus_streams 4 0
`
const vdev_cache_statsContents = `7 1 0x01 3 144 23617323692 12081684236238879
name type data
delegations 4 0
hits 4 0
misses 4 0
`
const pool_ioContents = `11 3 0x00 1 80 2225326830828 32953476980628
nread nwritten reads writes wtime wlentime wupdate rtime rlentime rupdate wcnt rcnt
1884160 6450688 22 978 272187126 2850519036 2263669418655 424226814 2850519036 2263669871823 0 0
`
var testKstatPath = os.TempDir() + "/telegraf/proc/spl/kstat/zfs"
func TestZfsPoolMetrics(t *testing.T) {
err := os.MkdirAll(testKstatPath, 0755)
require.NoError(t, err)
err = os.MkdirAll(testKstatPath+"/HOME", 0755)
require.NoError(t, err)
err = ioutil.WriteFile(testKstatPath+"/HOME/io", []byte(pool_ioContents), 0644)
require.NoError(t, err)
err = ioutil.WriteFile(testKstatPath+"/arcstats", []byte(arcstatsContents), 0644)
require.NoError(t, err)
poolMetrics := getPoolMetrics()
var acc testutil.Accumulator
z := &Zfs{KstatPath: testKstatPath, KstatMetrics: []string{"arcstats"}}
err = z.Gather(&acc)
require.NoError(t, err)
require.False(t, acc.HasMeasurement("zfs_pool"))
acc.Points = nil
z = &Zfs{KstatPath: testKstatPath, KstatMetrics: []string{"arcstats"}, PoolMetrics: true}
err = z.Gather(&acc)
require.NoError(t, err)
//one pool, all metrics
tags := map[string]string{
"pool": "HOME",
}
acc.AssertContainsTaggedFields(t, "zfs_pool", poolMetrics, tags)
err = os.RemoveAll(os.TempDir() + "/telegraf")
require.NoError(t, err)
}
func TestZfsGeneratesMetrics(t *testing.T) {
err := os.MkdirAll(testKstatPath, 0755)
require.NoError(t, err)
err = os.MkdirAll(testKstatPath+"/HOME", 0755)
require.NoError(t, err)
err = ioutil.WriteFile(testKstatPath+"/HOME/io", []byte(""), 0644)
require.NoError(t, err)
err = ioutil.WriteFile(testKstatPath+"/arcstats", []byte(arcstatsContents), 0644)
require.NoError(t, err)
err = ioutil.WriteFile(testKstatPath+"/zfetchstats", []byte(zfetchstatsContents), 0644)
require.NoError(t, err)
err = ioutil.WriteFile(testKstatPath+"/vdev_cache_stats", []byte(vdev_cache_statsContents), 0644)
require.NoError(t, err)
intMetrics := getKstatMetricsAll()
var acc testutil.Accumulator
//one pool, all metrics
tags := map[string]string{
"pools": "HOME",
}
z := &Zfs{KstatPath: testKstatPath}
err = z.Gather(&acc)
require.NoError(t, err)
acc.AssertContainsTaggedFields(t, "zfs", intMetrics, tags)
acc.Points = nil
//two pools, all metrics
err = os.MkdirAll(testKstatPath+"/STORAGE", 0755)
require.NoError(t, err)
err = ioutil.WriteFile(testKstatPath+"/STORAGE/io", []byte(""), 0644)
require.NoError(t, err)
tags = map[string]string{
"pools": "HOME::STORAGE",
}
z = &Zfs{KstatPath: testKstatPath}
acc = testutil.Accumulator{}
err = z.Gather(&acc)
require.NoError(t, err)
acc.AssertContainsTaggedFields(t, "zfs", intMetrics, tags)
acc.Points = nil
intMetrics = getKstatMetricsArcOnly()
//two pools, one metric
z = &Zfs{KstatPath: testKstatPath, KstatMetrics: []string{"arcstats"}}
acc = testutil.Accumulator{}
err = z.Gather(&acc)
require.NoError(t, err)
acc.AssertContainsTaggedFields(t, "zfs", intMetrics, tags)
err = os.RemoveAll(os.TempDir() + "/telegraf")
require.NoError(t, err)
}
func getKstatMetricsArcOnly() map[string]interface{} {
return map[string]interface{}{
"arcstats_hits": int64(5968846374),
"arcstats_misses": int64(1659178751),
"arcstats_demand_data_hits": int64(4860247322),
"arcstats_demand_data_misses": int64(501499535),
"arcstats_demand_metadata_hits": int64(708608325),
"arcstats_demand_metadata_misses": int64(156591375),
"arcstats_prefetch_data_hits": int64(367047144),
"arcstats_prefetch_data_misses": int64(974529898),
"arcstats_prefetch_metadata_hits": int64(32943583),
"arcstats_prefetch_metadata_misses": int64(26557943),
"arcstats_mru_hits": int64(301176811),
"arcstats_mru_ghost_hits": int64(47066067),
"arcstats_mfu_hits": int64(5520612438),
"arcstats_mfu_ghost_hits": int64(45784009),
"arcstats_deleted": int64(1718937704),
"arcstats_recycle_miss": int64(481222994),
"arcstats_mutex_miss": int64(20575623),
"arcstats_evict_skip": int64(14655903906543),
"arcstats_evict_l2_cached": int64(145310202998272),
"arcstats_evict_l2_eligible": int64(16345402777088),
"arcstats_evict_l2_ineligible": int64(7437226893312),
"arcstats_hash_elements": int64(36617980),
"arcstats_hash_elements_max": int64(36618318),
"arcstats_hash_collisions": int64(554145157),
"arcstats_hash_chains": int64(4187651),
"arcstats_hash_chain_max": int64(26),
"arcstats_p": int64(13963222064),
"arcstats_c": int64(16381258376),
"arcstats_c_min": int64(4194304),
"arcstats_c_max": int64(16884125696),
"arcstats_size": int64(16319887096),
"arcstats_hdr_size": int64(42567864),
"arcstats_data_size": int64(60066304),
"arcstats_meta_size": int64(1701534208),
"arcstats_other_size": int64(1661543168),
"arcstats_anon_size": int64(94720),
"arcstats_anon_evict_data": int64(0),
"arcstats_anon_evict_metadata": int64(0),
"arcstats_mru_size": int64(973099008),
"arcstats_mru_evict_data": int64(9175040),
"arcstats_mru_evict_metadata": int64(32768),
"arcstats_mru_ghost_size": int64(32768),
"arcstats_mru_ghost_evict_data": int64(0),
"arcstats_mru_ghost_evict_metadata": int64(32768),
"arcstats_mfu_size": int64(788406784),
"arcstats_mfu_evict_data": int64(50881024),
"arcstats_mfu_evict_metadata": int64(81920),
"arcstats_mfu_ghost_size": int64(0),
"arcstats_mfu_ghost_evict_data": int64(0),
"arcstats_mfu_ghost_evict_metadata": int64(0),
"arcstats_l2_hits": int64(573868618),
"arcstats_l2_misses": int64(1085309718),
"arcstats_l2_feeds": int64(12182087),
"arcstats_l2_rw_clash": int64(9610),
"arcstats_l2_read_bytes": int64(32695938336768),
"arcstats_l2_write_bytes": int64(2826774778880),
"arcstats_l2_writes_sent": int64(4267687),
"arcstats_l2_writes_done": int64(4267687),
"arcstats_l2_writes_error": int64(0),
"arcstats_l2_writes_hdr_miss": int64(164),
"arcstats_l2_evict_lock_retry": int64(5),
"arcstats_l2_evict_reading": int64(0),
"arcstats_l2_free_on_write": int64(1606914),
"arcstats_l2_cdata_free_on_write": int64(1775),
"arcstats_l2_abort_lowmem": int64(83462),
"arcstats_l2_cksum_bad": int64(393860640),
"arcstats_l2_io_error": int64(53881460),
"arcstats_l2_size": int64(2471466648576),
"arcstats_l2_asize": int64(2461690072064),
"arcstats_l2_hdr_size": int64(12854175552),
"arcstats_l2_compress_successes": int64(12184849),
"arcstats_l2_compress_zeros": int64(0),
"arcstats_l2_compress_failures": int64(0),
"arcstats_memory_throttle_count": int64(0),
"arcstats_duplicate_buffers": int64(0),
"arcstats_duplicate_buffers_size": int64(0),
"arcstats_duplicate_reads": int64(0),
"arcstats_memory_direct_count": int64(5159942),
"arcstats_memory_indirect_count": int64(3034640),
"arcstats_arc_no_grow": int64(0),
"arcstats_arc_tempreserve": int64(0),
"arcstats_arc_loaned_bytes": int64(0),
"arcstats_arc_prune": int64(114554259559),
"arcstats_arc_meta_used": int64(16259820792),
"arcstats_arc_meta_limit": int64(12663094272),
"arcstats_arc_meta_max": int64(18327165696),
}
}
func getKstatMetricsAll() map[string]interface{} {
otherMetrics := map[string]interface{}{
"zfetchstats_hits": int64(7812959060),
"zfetchstats_misses": int64(4154484207),
"zfetchstats_colinear_hits": int64(1366368),
"zfetchstats_colinear_misses": int64(4153117839),
"zfetchstats_stride_hits": int64(7309776732),
"zfetchstats_stride_misses": int64(222766182),
"zfetchstats_reclaim_successes": int64(107788388),
"zfetchstats_reclaim_failures": int64(4045329451),
"zfetchstats_streams_resets": int64(20989756),
"zfetchstats_streams_noresets": int64(503182328),
"zfetchstats_bogus_streams": int64(0),
"vdev_cache_stats_delegations": int64(0),
"vdev_cache_stats_hits": int64(0),
"vdev_cache_stats_misses": int64(0),
}
arcMetrics := getKstatMetricsArcOnly()
for k, v := range otherMetrics {
arcMetrics[k] = v
}
return arcMetrics
}
func getPoolMetrics() map[string]interface{} {
return map[string]interface{}{
"nread": int64(1884160),
"nwritten": int64(6450688),
"reads": int64(22),
"writes": int64(978),
"wtime": int64(272187126),
"wlentime": int64(2850519036),
"wupdate": int64(2263669418655),
"rtime": int64(424226814),
"rlentime": int64(2850519036),
"rupdate": int64(2263669871823),
"wcnt": int64(0),
"rcnt": int64(0),
}
}