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Collectors (SQL Server 2000+, version-specific SQL, least privilege): server, configuration, trace flags, databases (settings, backups in UTC, CHECKDB, VLFs, Query Store, files, tempdb), suspect pages, plan cache, wait stats and file I/O as deltas with restart/clear detection, performance counters, CPU from the scheduler monitor ring buffer, blocking (sleeping head blockers with open transactions), and deadlocks from system_health continuing from the last file offset. Rules: configuration (memory, MAXDOP per Microsoft NUMA guidance, cost threshold, ad hoc bloat, risky options, pending changes), databases (state, settings, backups, log backups, CHECKDB, suspect pages, VLFs, autogrowth, max size, Query Store, tempdb), waits (THREADPOOL, signal waits, locks, I/O, WRITELOG, parallelism, PAGELATCH), I/O latency, CPU, memory grants, blocking and deadlocks. Missing data makes a rule not measurable with the collector's reason. Integration tests run every collector as the least-privilege login and reproduce real blocking and a real deadlock; green on 2017 and 2022. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01E3EExwndy8Z22EK2Qpt6BK
29 lines
1.3 KiB
C#
29 lines
1.3 KiB
C#
using SQLInsight.Core.Data;
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namespace SQLInsight.Collectors.Instance;
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public sealed class ConfigurationCollector : Collector<ConfigurationSnapshot>
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{
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internal const string Sql2005 =
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"SELECT name, CAST(value AS bigint), CAST(value_in_use AS bigint) FROM sys.configurations";
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// What sp_configure itself reads on SQL Server 2000.
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internal const string Sql2000 = """
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SELECT v.name, CAST(c.value AS bigint), CAST(r.value AS bigint)
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FROM master.dbo.spt_values v
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JOIN master.dbo.sysconfigures c ON c.config = v.number
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JOIN master.dbo.syscurconfigs r ON r.config = v.number
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WHERE v.type = 'C'
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""";
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public override string Name => "configuration";
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public override TimeSpan DefaultInterval => TimeSpan.FromMinutes(15);
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protected override async Task<ConfigurationSnapshot> CollectAsync(CollectorContext context, ConfigurationSnapshot? previous)
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{
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var sql = context.Instance.Version.Major >= 9 ? Sql2005 : Sql2000;
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var options = await Db.QueryAsync(context.Connection, sql, r => new ConfigurationOption(r.String(0), r.Long(1), r.Long(2)), context.CancellationToken)
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.ConfigureAwait(false);
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return new ConfigurationSnapshot { CapturedAt = context.Now, Options = options };
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}
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}
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