| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package clickhouse |
| 4 | |
| 5 | import ( |
| 6 | "errors" |
| 7 | "strconv" |
| 8 | |
| 9 | "github.com/netdata/netdata/go/plugins/pkg/web" |
| 10 | ) |
| 11 | |
| 12 | const querySystemEvents = ` |
| 13 | SELECT |
| 14 | event, |
| 15 | value |
| 16 | FROM |
| 17 | system.events FORMAT CSVWithNames |
| 18 | ` |
| 19 | |
| 20 | func (c *Collector) collectSystemEvents(mx map[string]int64) error { |
| 21 | req, err := web.NewHTTPRequest(c.RequestConfig) |
| 22 | if err != nil { |
| 23 | return err |
| 24 | } |
| 25 | req.URL.RawQuery = makeURLQuery(querySystemEvents) |
| 26 | |
| 27 | px := "events_" |
| 28 | var event string |
| 29 | var n int |
| 30 | |
| 31 | err = c.doHTTP(req, func(column, value string, lineEnd bool) { |
| 32 | switch column { |
| 33 | case "event": |
| 34 | event = value |
| 35 | case "value": |
| 36 | if !wantSystemEvents[event] { |
| 37 | return |
| 38 | } |
| 39 | n++ |
| 40 | if v, err := strconv.ParseInt(value, 10, 64); err == nil { |
| 41 | mx[px+event] = v |
| 42 | } |
| 43 | } |
| 44 | }) |
| 45 | if err != nil { |
| 46 | return err |
| 47 | } |
| 48 | if n == 0 { |
| 49 | return errors.New("no system events data returned") |
| 50 | } |
| 51 | |
| 52 | // CH doesn't expose events with 0 values |
| 53 | for k := range wantSystemEvents { |
| 54 | k = px + k |
| 55 | if _, ok := mx[k]; !ok { |
| 56 | mx[k] = 0 |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | mx["events_SuccessfulQuery"] = mx["events_Query"] - mx["events_FailedQuery"] |
| 61 | mx["events_SuccessfulSelectQuery"] = mx["events_SelectQuery"] - mx["events_FailedSelectQuery"] |
| 62 | mx["events_SuccessfulInsertQuery"] = mx["events_InsertQuery"] - mx["events_FailedInsertQuery"] |
| 63 | |
| 64 | return nil |
| 65 | } |
| 66 | |
| 67 | var wantSystemEvents = map[string]bool{ |
| 68 | "SlowRead": true, |
| 69 | "ReadBackoff": true, |
| 70 | "Query": true, |
| 71 | "FailedQuery": true, |
| 72 | "QueryTimeMicroseconds": true, |
| 73 | "SelectQuery": true, |
| 74 | "FailedSelectQuery": true, |
| 75 | "SelectQueryTimeMicroseconds": true, |
| 76 | "InsertQuery": true, |
| 77 | "FailedInsertQuery": true, |
| 78 | "InsertQueryTimeMicroseconds": true, |
| 79 | "QueryPreempted": true, |
| 80 | "QueryMemoryLimitExceeded": true, |
| 81 | "InsertedRows": true, |
| 82 | "InsertedBytes": true, |
| 83 | "DelayedInserts": true, |
| 84 | "DelayedInsertsMilliseconds": true, |
| 85 | "RejectedInserts": true, |
| 86 | "SelectedRows": true, |
| 87 | "SelectedBytes": true, |
| 88 | "SelectedParts": true, |
| 89 | "SelectedRanges": true, |
| 90 | "SelectedMarks": true, |
| 91 | "Merge": true, |
| 92 | "MergedRows": true, |
| 93 | "MergedUncompressedBytes": true, |
| 94 | "MergesTimeMilliseconds": true, |
| 95 | "MergeTreeDataWriterRows": true, |
| 96 | "MergeTreeDataWriterUncompressedBytes": true, |
| 97 | "MergeTreeDataWriterCompressedBytes": true, |
| 98 | "UncompressedCacheHits": true, |
| 99 | "UncompressedCacheMisses": true, |
| 100 | "MarkCacheHits": true, |
| 101 | "MarkCacheMisses": true, |
| 102 | "Seek": true, |
| 103 | "FileOpen": true, |
| 104 | "ReadBufferFromFileDescriptorReadBytes": true, |
| 105 | "WriteBufferFromFileDescriptorWriteBytes": true, |
| 106 | "ReadBufferFromFileDescriptorRead": true, |
| 107 | "WriteBufferFromFileDescriptorWrite": true, |
| 108 | "ReadBufferFromFileDescriptorReadFailed": true, |
| 109 | "WriteBufferFromFileDescriptorWriteFailed": true, |
| 110 | "DistributedConnectionTries": true, |
| 111 | "DistributedConnectionFailTry": true, |
| 112 | "DistributedConnectionFailAtAll": true, |
| 113 | "DistributedRejectedInserts": true, |
| 114 | "DistributedDelayedInserts": true, |
| 115 | "DistributedDelayedInsertsMilliseconds": true, |
| 116 | "DistributedSyncInsertionTimeoutExceeded": true, |
| 117 | "DistributedAsyncInsertionFailures": true, |
| 118 | "ReplicatedDataLoss": true, |
| 119 | "ReplicatedPartFetches": true, |
| 120 | "ReplicatedPartFailedFetches": true, |
| 121 | "ReplicatedPartMerges": true, |
| 122 | "ReplicatedPartFetchesOfMerged": true, |
| 123 | } |