14 lines
780 B
Markdown
14 lines
780 B
Markdown
# Slow Database Statement
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Slow Database statements are significant important to find out the bottleneck of the system, which relied on Database.
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Slow DB statements are based on sampling, right now, the core samples top 50 slowest in every 10 minutes.
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But duration of those statements must be slower than threshold.
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The setting format is following, unit is millisecond.
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> database-type:thresholdValue,database-type2:thresholdValue2
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Default setting is `default:200,mongodb:100`. `Reserved DB type` is **default**, which be as default threshold for all
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database types, except set explicitly.
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**Notice**, the threshold should not be too small, like `1ms`. Functionally, it works, but would cost OAP performance issue,
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if your system statement access time are mostly more than 1ms. |