diff options
Diffstat (limited to 'src/go/collectors/go.d.plugin/modules/postgres/do_query_replication.go')
-rw-r--r-- | src/go/collectors/go.d.plugin/modules/postgres/do_query_replication.go | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/src/go/collectors/go.d.plugin/modules/postgres/do_query_replication.go b/src/go/collectors/go.d.plugin/modules/postgres/do_query_replication.go new file mode 100644 index 000000000..22ff47003 --- /dev/null +++ b/src/go/collectors/go.d.plugin/modules/postgres/do_query_replication.go @@ -0,0 +1,94 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +package postgres + +import ( + "fmt" +) + +func (p *Postgres) doQueryReplicationMetrics() error { + if err := p.doQueryReplStandbyAppWALDelta(); err != nil { + return fmt.Errorf("querying replication standby app wal delta error: %v", err) + } + + if p.pgVersion >= pgVersion10 { + if err := p.doQueryReplStandbyAppWALLag(); err != nil { + return fmt.Errorf("querying replication standby app wal lag error: %v", err) + } + } + + if p.pgVersion >= pgVersion10 && p.isSuperUser() { + if err := p.doQueryReplSlotFiles(); err != nil { + return fmt.Errorf("querying replication slot files error: %v", err) + } + } + + return nil +} + +func (p *Postgres) doQueryReplStandbyAppWALDelta() error { + q := queryReplicationStandbyAppDelta(p.pgVersion) + + var app string + return p.doQuery(q, func(column, value string, _ bool) { + switch column { + case "application_name": + app = value + p.getReplAppMetrics(app).updated = true + default: + // TODO: delta calculation was changed in https://github.com/netdata/netdata/go/go.d.plugin/pull/1039 + // - 'replay_delta' (probably other deltas too?) can be negative + // - Also, WAL delta != WAL lag after that PR + v := parseInt(value) + if v < 0 { + v = 0 + } + switch column { + case "sent_delta": + p.getReplAppMetrics(app).walSentDelta += v + case "write_delta": + p.getReplAppMetrics(app).walWriteDelta += v + case "flush_delta": + p.getReplAppMetrics(app).walFlushDelta += v + case "replay_delta": + p.getReplAppMetrics(app).walReplayDelta += v + } + } + }) +} + +func (p *Postgres) doQueryReplStandbyAppWALLag() error { + q := queryReplicationStandbyAppLag() + + var app string + return p.doQuery(q, func(column, value string, _ bool) { + switch column { + case "application_name": + app = value + p.getReplAppMetrics(app).updated = true + case "write_lag": + p.getReplAppMetrics(app).walWriteLag += parseInt(value) + case "flush_lag": + p.getReplAppMetrics(app).walFlushLag += parseInt(value) + case "replay_lag": + p.getReplAppMetrics(app).walReplayLag += parseInt(value) + } + }) +} + +func (p *Postgres) doQueryReplSlotFiles() error { + q := queryReplicationSlotFiles(p.pgVersion) + + var slot string + return p.doQuery(q, func(column, value string, _ bool) { + switch column { + case "slot_name": + slot = value + p.getReplSlotMetrics(slot).updated = true + case "replslot_wal_keep": + p.getReplSlotMetrics(slot).walKeep += parseInt(value) + case "replslot_files": + p.getReplSlotMetrics(slot).files += parseInt(value) + } + }) +} |