Add support for additional metrics on Linux in zfs input (#3565)
This commit is contained in:
Richard Elling
Daniel Nelson
parent
1ea8d648dc
commit
f13afea7d9
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@ -13,8 +13,12 @@ from `sysctl` and `zpool` on FreeBSD.
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# kstatPath = "/proc/spl/kstat/zfs"
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# kstatPath = "/proc/spl/kstat/zfs"
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## By default, telegraf gather all zfs stats
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## By default, telegraf gather all zfs stats
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## If not specified, then default is:
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## Override the stats list using the kstatMetrics array:
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## For FreeBSD, the default is:
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# kstatMetrics = ["arcstats", "zfetchstats", "vdev_cache_stats"]
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# kstatMetrics = ["arcstats", "zfetchstats", "vdev_cache_stats"]
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## For Linux, the default is:
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# kstatMetrics = ["abdstats", "arcstats", "dnodestats", "dbufcachestats",
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# "dmu_tx", "fm", "vdev_mirror_stats", "zfetchstats", "zil"]
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## By default, don't gather zpool stats
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## By default, don't gather zpool stats
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# poolMetrics = false
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# poolMetrics = false
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@ -22,8 +26,8 @@ from `sysctl` and `zpool` on FreeBSD.
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### Measurements & Fields:
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### Measurements & Fields:
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By default this plugin collects metrics about **Arc**, **Zfetch**, and
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By default this plugin collects metrics about ZFS internals and pool.
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**Vdev cache**. All these metrics are either counters or measure sizes
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These metrics are either counters or measure sizes
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in bytes. These metrics will be in the `zfs` measurement with the field
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in bytes. These metrics will be in the `zfs` measurement with the field
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names listed bellow.
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names listed bellow.
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@ -33,7 +37,7 @@ each pool.
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- zfs
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- zfs
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With fields listed bellow.
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With fields listed bellow.
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#### Arc Stats
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#### ARC Stats (FreeBSD and Linux)
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- arcstats_allocated (FreeBSD only)
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- arcstats_allocated (FreeBSD only)
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- arcstats_anon_evict_data (Linux only)
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- arcstats_anon_evict_data (Linux only)
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@ -153,7 +157,7 @@ each pool.
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- arcstats_size
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- arcstats_size
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- arcstats_sync_wait_for_async (FreeBSD only)
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- arcstats_sync_wait_for_async (FreeBSD only)
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#### Zfetch Stats
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#### Zfetch Stats (FreeBSD and Linux)
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- zfetchstats_bogus_streams (Linux only)
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- zfetchstats_bogus_streams (Linux only)
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- zfetchstats_colinear_hits (Linux only)
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- zfetchstats_colinear_hits (Linux only)
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@ -168,7 +172,7 @@ each pool.
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- zfetchstats_stride_hits (Linux only)
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- zfetchstats_stride_hits (Linux only)
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- zfetchstats_stride_misses (Linux only)
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- zfetchstats_stride_misses (Linux only)
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#### Vdev Cache Stats
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#### Vdev Cache Stats (FreeBSD)
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- vdev_cache_stats_delegations
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- vdev_cache_stats_delegations
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- vdev_cache_stats_hits
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- vdev_cache_stats_hits
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@ -176,21 +180,21 @@ each pool.
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#### Pool Metrics (optional)
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#### Pool Metrics (optional)
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On Linux:
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On Linux (reference: kstat accumulated time and queue length statistics):
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- zfs_pool
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- zfs_pool
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- nread (integer, )
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- nread (integer, bytes)
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- nwritten (integer, )
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- nwritten (integer, bytes)
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- reads (integer, )
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- reads (integer, count)
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- writes (integer, )
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- writes (integer, count)
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- wtime (integer, )
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- wtime (integer, nanoseconds)
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- wlentime (integer, )
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- wlentime (integer, queuelength * nanoseconds)
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- wupdate (integer, )
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- wupdate (integer, timestamp)
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- rtime (integer, )
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- rtime (integer, nanoseconds)
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- rlentime (integer, )
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- rlentime (integer, queuelength * nanoseconds)
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- rupdate (integer, )
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- rupdate (integer, timestamp)
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- wcnt (integer, )
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- wcnt (integer, count)
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- rcnt (integer, )
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- rcnt (integer, count)
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On FreeBSD:
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On FreeBSD:
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@ -224,7 +228,7 @@ $ ./telegraf --config telegraf.conf --input-filter zfs --test
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A short description for some of the metrics.
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A short description for some of the metrics.
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#### Arc Stats
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#### ARC Stats
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`arcstats_hits` Total amount of cache hits in the arc.
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`arcstats_hits` Total amount of cache hits in the arc.
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@ -283,12 +287,43 @@ A short description for some of the metrics.
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`zfetchstats_hits` Counts the number of cache hits, to items which are in the cache because of the prefetcher.
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`zfetchstats_hits` Counts the number of cache hits, to items which are in the cache because of the prefetcher.
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`zfetchstats_misses` Counts the number of prefetch cache misses.
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`zfetchstats_colinear_hits` Counts the number of cache hits, to items which are in the cache because of the prefetcher (prefetched linear reads)
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`zfetchstats_colinear_hits` Counts the number of cache hits, to items which are in the cache because of the prefetcher (prefetched linear reads)
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`zfetchstats_stride_hits` Counts the number of cache hits, to items which are in the cache because of the prefetcher (prefetched stride reads)
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`zfetchstats_stride_hits` Counts the number of cache hits, to items which are in the cache because of the prefetcher (prefetched stride reads)
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#### Vdev Cache Stats
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#### Vdev Cache Stats (FreeBSD only)
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note: the vdev cache is deprecated in some ZFS implementations
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`vdev_cache_stats_hits` Hits to the vdev (device level) cache.
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`vdev_cache_stats_hits` Hits to the vdev (device level) cache.
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`vdev_cache_stats_misses` Misses to the vdev (device level) cache.
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`vdev_cache_stats_misses` Misses to the vdev (device level) cache.
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#### ABD Stats (Linux Only)
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ABD is a linear/scatter dual typed buffer for ARC
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`abdstats_linear_cnt` number of linear ABDs which are currently allocated
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`abdstats_linear_data_size` amount of data stored in all linear ABDs
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`abdstats_scatter_cnt` number of scatter ABDs which are currently allocated
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`abdstats_scatter_data_size` amount of data stored in all scatter ABDs
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#### DMU Stats (Linux Only)
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`dmu_tx_dirty_throttle` counts when writes are throttled due to the amount of dirty data growing too large
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`dmu_tx_memory_reclaim` counts when memory is low and throttling activity
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`dmu_tx_memory_reserve` counts when memory footprint of the txg exceeds the ARC size
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#### Fault Management Ereport errors (Linux Only)
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`fm_erpt-dropped` counts when an error report cannot be created (eg available memory is too low)
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#### ZIL (Linux Only)
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note: ZIL measurements are system-wide, neither per-pool nor per-dataset
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`zil_commit_count` counts when ZFS transactions are committed to a ZIL
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@ -19,7 +19,9 @@ var sampleConfig = `
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## By default, telegraf gather all zfs stats
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## By default, telegraf gather all zfs stats
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## If not specified, then default is:
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## If not specified, then default is:
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# kstatMetrics = ["arcstats", "zfetchstats", "vdev_cache_stats"]
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# kstatMetrics = ["arcstats", "zfetchstats", "vdev_cache_stats"]
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## For Linux, the default is:
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# kstatMetrics = ["abdstats", "arcstats", "dnodestats", "dbufcachestats",
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# "dmu_tx", "fm", "vdev_mirror_stats", "zfetchstats", "zil"]
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## By default, don't gather zpool stats
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## By default, don't gather zpool stats
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# poolMetrics = false
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# poolMetrics = false
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`
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`
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@ -80,7 +80,11 @@ func gatherPoolStats(pool poolInfo, acc telegraf.Accumulator) error {
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func (z *Zfs) Gather(acc telegraf.Accumulator) error {
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func (z *Zfs) Gather(acc telegraf.Accumulator) error {
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kstatMetrics := z.KstatMetrics
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kstatMetrics := z.KstatMetrics
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if len(kstatMetrics) == 0 {
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if len(kstatMetrics) == 0 {
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kstatMetrics = []string{"arcstats", "zfetchstats", "vdev_cache_stats"}
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// vdev_cache_stats is deprecated
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// xuio_stats are ignored because as of Sep-2016, no known
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// consumers of xuio exist on Linux
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kstatMetrics = []string{"abdstats", "arcstats", "dnodestats", "dbufcachestats",
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"dmu_tx", "fm", "vdev_mirror_stats", "zfetchstats", "zil"}
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}
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}
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kstatPath := z.KstatPath
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kstatPath := z.KstatPath
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@ -104,7 +108,7 @@ func (z *Zfs) Gather(acc telegraf.Accumulator) error {
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for _, metric := range kstatMetrics {
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for _, metric := range kstatMetrics {
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lines, err := internal.ReadLines(kstatPath + "/" + metric)
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lines, err := internal.ReadLines(kstatPath + "/" + metric)
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if err != nil {
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if err != nil {
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return err
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continue
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}
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}
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for i, line := range lines {
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for i, line := range lines {
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if i == 0 || i == 1 {
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if i == 0 || i == 1 {
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@ -115,6 +119,9 @@ func (z *Zfs) Gather(acc telegraf.Accumulator) error {
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}
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}
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rawData := strings.Split(line, " ")
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rawData := strings.Split(line, " ")
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key := metric + "_" + rawData[0]
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key := metric + "_" + rawData[0]
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if metric == "zil" || metric == "dmu_tx" || metric == "dnodestats" {
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key = rawData[0]
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}
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rawValue := rawData[len(rawData)-1]
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rawValue := rawData[len(rawData)-1]
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value, _ := strconv.ParseInt(rawValue, 10, 64)
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value, _ := strconv.ParseInt(rawValue, 10, 64)
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fields[key] = value
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fields[key] = value
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@ -115,16 +115,133 @@ streams_resets 4 20989756
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streams_noresets 4 503182328
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streams_noresets 4 503182328
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bogus_streams 4 0
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bogus_streams 4 0
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`
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`
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const vdev_cache_statsContents = `7 1 0x01 3 144 23617323692 12081684236238879
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name type data
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delegations 4 0
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hits 4 0
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misses 4 0
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`
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const pool_ioContents = `11 3 0x00 1 80 2225326830828 32953476980628
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const pool_ioContents = `11 3 0x00 1 80 2225326830828 32953476980628
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nread nwritten reads writes wtime wlentime wupdate rtime rlentime rupdate wcnt rcnt
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nread nwritten reads writes wtime wlentime wupdate rtime rlentime rupdate wcnt rcnt
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1884160 6450688 22 978 272187126 2850519036 2263669418655 424226814 2850519036 2263669871823 0 0
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1884160 6450688 22 978 272187126 2850519036 2263669418655 424226814 2850519036 2263669871823 0 0
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`
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`
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const zilContents = `7 1 0x01 14 672 34118481334 437444452158445
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name type data
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zil_commit_count 4 77
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zil_commit_writer_count 4 77
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zil_itx_count 4 1
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zil_itx_indirect_count 4 2
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zil_itx_indirect_bytes 4 3
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zil_itx_copied_count 4 4
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zil_itx_copied_bytes 4 5
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zil_itx_needcopy_count 4 6
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zil_itx_needcopy_bytes 4 7
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zil_itx_metaslab_normal_count 4 8
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zil_itx_metaslab_normal_bytes 4 9
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zil_itx_metaslab_slog_count 4 10
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zil_itx_metaslab_slog_bytes 4 11
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`
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const fmContents = `0 1 0x01 4 192 34087340971 437562103532892
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name type data
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erpt-dropped 4 101
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erpt-set-failed 4 202
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fmri-set-failed 4 303
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payload-set-failed 4 404
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`
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const dmu_txContents = `5 1 0x01 11 528 34103260832 437683925071438
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name type data
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dmu_tx_assigned 4 39321636
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dmu_tx_delay 4 111
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dmu_tx_error 4 222
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dmu_tx_suspended 4 333
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dmu_tx_group 4 444
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dmu_tx_memory_reserve 4 555
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dmu_tx_memory_reclaim 4 666
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dmu_tx_dirty_throttle 4 777
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dmu_tx_dirty_delay 4 888
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dmu_tx_dirty_over_max 4 999
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dmu_tx_quota 4 101010
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`
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const abdstatsContents = `7 1 0x01 21 1008 25476602923533 29223577332204
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name type data
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struct_size 4 33840
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linear_cnt 4 834
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linear_data_size 4 989696
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scatter_cnt 4 12
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scatter_data_size 4 187904
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scatter_chunk_waste 4 4608
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scatter_order_0 4 1
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scatter_order_1 4 21
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scatter_order_2 4 11
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scatter_order_3 4 33
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scatter_order_4 4 44
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scatter_order_5 4 76
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scatter_order_6 4 489
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scatter_order_7 4 237483
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scatter_order_8 4 233
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scatter_order_9 4 4411
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scatter_order_10 4 1023
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scatter_page_multi_chunk 4 32122
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scatter_page_multi_zone 4 9930
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scatter_page_alloc_retry 4 99311
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scatter_sg_table_retry 4 99221
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`
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const dbufcachestatsContents = `
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15 1 0x01 11 2992 6257505590736 8516276189184
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name type data
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size 4 242688
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size_max 4 338944
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max_bytes 4 62834368
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lowater_bytes 4 56550932
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hiwater_bytes 4 69117804
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total_evicts 4 0
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hash_collisions 4 0
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hash_elements 4 31
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hash_elements_max 4 32
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hash_chains 4 0
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hash_chain_max 4 0
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`
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const dnodestatsContents = `
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10 1 0x01 28 7616 6257498525011 8671911551753
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name type data
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dnode_hold_dbuf_hold 4 0
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dnode_hold_dbuf_read 4 0
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dnode_hold_alloc_hits 4 1460
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dnode_hold_alloc_misses 4 0
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dnode_hold_alloc_interior 4 0
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dnode_hold_alloc_lock_retry 4 0
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dnode_hold_alloc_lock_misses 4 0
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dnode_hold_alloc_type_none 4 0
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dnode_hold_free_hits 4 2
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dnode_hold_free_misses 4 0
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dnode_hold_free_lock_misses 4 0
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dnode_hold_free_lock_retry 4 0
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dnode_hold_free_overflow 4 0
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dnode_hold_free_refcount 4 0
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dnode_hold_free_txg 4 0
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dnode_allocate 4 2
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dnode_reallocate 4 0
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dnode_buf_evict 4 6
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dnode_alloc_next_chunk 4 1
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dnode_alloc_race 4 0
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dnode_alloc_next_block 4 0
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dnode_move_invalid 4 0
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dnode_move_recheck1 4 0
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dnode_move_recheck2 4 0
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dnode_move_special 4 0
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dnode_move_handle 4 0
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dnode_move_rwlock 4 0
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dnode_move_active 4 0
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`
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const vdevmirrorcachestatsContents = `
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18 1 0x01 7 1904 6257505684227 9638257816287
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name type data
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rotating_linear 4 0
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rotating_offset 4 0
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rotating_seek 4 0
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non_rotating_linear 4 0
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non_rotating_seek 4 0
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preferred_found 4 0
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preferred_not_found 4 43
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`
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var testKstatPath = os.TempDir() + "/telegraf/proc/spl/kstat/zfs"
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var testKstatPath = os.TempDir() + "/telegraf/proc/spl/kstat/zfs"
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@ -183,7 +300,16 @@ func TestZfsGeneratesMetrics(t *testing.T) {
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err = ioutil.WriteFile(testKstatPath+"/zfetchstats", []byte(zfetchstatsContents), 0644)
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err = ioutil.WriteFile(testKstatPath+"/zfetchstats", []byte(zfetchstatsContents), 0644)
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require.NoError(t, err)
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require.NoError(t, err)
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|
||||||
err = ioutil.WriteFile(testKstatPath+"/vdev_cache_stats", []byte(vdev_cache_statsContents), 0644)
|
err = ioutil.WriteFile(testKstatPath+"/zil", []byte(zilContents), 0644)
|
||||||
|
require.NoError(t, err)
|
||||||
|
|
||||||
|
err = ioutil.WriteFile(testKstatPath+"/fm", []byte(fmContents), 0644)
|
||||||
|
require.NoError(t, err)
|
||||||
|
|
||||||
|
err = ioutil.WriteFile(testKstatPath+"/dmu_tx", []byte(dmu_txContents), 0644)
|
||||||
|
require.NoError(t, err)
|
||||||
|
|
||||||
|
err = ioutil.WriteFile(testKstatPath+"/abdstats", []byte(abdstatsContents), 0644)
|
||||||
require.NoError(t, err)
|
require.NoError(t, err)
|
||||||
|
|
||||||
intMetrics := getKstatMetricsAll()
|
intMetrics := getKstatMetricsAll()
|
||||||
|
|
@ -339,9 +465,55 @@ func getKstatMetricsAll() map[string]interface{} {
|
||||||
"zfetchstats_streams_resets": int64(20989756),
|
"zfetchstats_streams_resets": int64(20989756),
|
||||||
"zfetchstats_streams_noresets": int64(503182328),
|
"zfetchstats_streams_noresets": int64(503182328),
|
||||||
"zfetchstats_bogus_streams": int64(0),
|
"zfetchstats_bogus_streams": int64(0),
|
||||||
"vdev_cache_stats_delegations": int64(0),
|
"zil_commit_count": int64(77),
|
||||||
"vdev_cache_stats_hits": int64(0),
|
"zil_commit_writer_count": int64(77),
|
||||||
"vdev_cache_stats_misses": int64(0),
|
"zil_itx_count": int64(1),
|
||||||
|
"zil_itx_indirect_count": int64(2),
|
||||||
|
"zil_itx_indirect_bytes": int64(3),
|
||||||
|
"zil_itx_copied_count": int64(4),
|
||||||
|
"zil_itx_copied_bytes": int64(5),
|
||||||
|
"zil_itx_needcopy_count": int64(6),
|
||||||
|
"zil_itx_needcopy_bytes": int64(7),
|
||||||
|
"zil_itx_metaslab_normal_count": int64(8),
|
||||||
|
"zil_itx_metaslab_normal_bytes": int64(9),
|
||||||
|
"zil_itx_metaslab_slog_count": int64(10),
|
||||||
|
"zil_itx_metaslab_slog_bytes": int64(11),
|
||||||
|
"fm_erpt-dropped": int64(101),
|
||||||
|
"fm_erpt-set-failed": int64(202),
|
||||||
|
"fm_fmri-set-failed": int64(303),
|
||||||
|
"fm_payload-set-failed": int64(404),
|
||||||
|
"dmu_tx_assigned": int64(39321636),
|
||||||
|
"dmu_tx_delay": int64(111),
|
||||||
|
"dmu_tx_error": int64(222),
|
||||||
|
"dmu_tx_suspended": int64(333),
|
||||||
|
"dmu_tx_group": int64(444),
|
||||||
|
"dmu_tx_memory_reserve": int64(555),
|
||||||
|
"dmu_tx_memory_reclaim": int64(666),
|
||||||
|
"dmu_tx_dirty_throttle": int64(777),
|
||||||
|
"dmu_tx_dirty_delay": int64(888),
|
||||||
|
"dmu_tx_dirty_over_max": int64(999),
|
||||||
|
"dmu_tx_quota": int64(101010),
|
||||||
|
"abdstats_struct_size": int64(33840),
|
||||||
|
"abdstats_linear_cnt": int64(834),
|
||||||
|
"abdstats_linear_data_size": int64(989696),
|
||||||
|
"abdstats_scatter_cnt": int64(12),
|
||||||
|
"abdstats_scatter_data_size": int64(187904),
|
||||||
|
"abdstats_scatter_chunk_waste": int64(4608),
|
||||||
|
"abdstats_scatter_order_0": int64(1),
|
||||||
|
"abdstats_scatter_order_1": int64(21),
|
||||||
|
"abdstats_scatter_order_2": int64(11),
|
||||||
|
"abdstats_scatter_order_3": int64(33),
|
||||||
|
"abdstats_scatter_order_4": int64(44),
|
||||||
|
"abdstats_scatter_order_5": int64(76),
|
||||||
|
"abdstats_scatter_order_6": int64(489),
|
||||||
|
"abdstats_scatter_order_7": int64(237483),
|
||||||
|
"abdstats_scatter_order_8": int64(233),
|
||||||
|
"abdstats_scatter_order_9": int64(4411),
|
||||||
|
"abdstats_scatter_order_10": int64(1023),
|
||||||
|
"abdstats_scatter_page_multi_chunk": int64(32122),
|
||||||
|
"abdstats_scatter_page_multi_zone": int64(9930),
|
||||||
|
"abdstats_scatter_page_alloc_retry": int64(99311),
|
||||||
|
"abdstats_scatter_sg_table_retry": int64(99221),
|
||||||
}
|
}
|
||||||
arcMetrics := getKstatMetricsArcOnly()
|
arcMetrics := getKstatMetricsArcOnly()
|
||||||
for k, v := range otherMetrics {
|
for k, v := range otherMetrics {
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue