[exporter/elasticsearch] Serialize the @timestamp field for metrics as a number
#41811
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… as a number This improves the ingestion performance in Elasticsearch as it can leverage an optimized code path for date parsing. See elastic/elasticsearch#132462 This is not a breaking change because we are using the `date` field type for metrics. Supporting a more granular date format, such as `date_nanos` doesn't seem sensible for metrics as it would cause a big storage overhead. Most other metrics data stores also don't support more granularity than milliseconds.
carsonip
reviewed
Aug 6, 2025
Co-authored-by: Carson Ip <[email protected]>
carsonip
approved these changes
Aug 6, 2025
atoulme
approved these changes
Aug 6, 2025
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This improves the ingestion performance in Elasticsearch as it can leverage an optimized code path for date parsing.
See elastic/elasticsearch#132462
This is not a breaking change because we are using the
datefield type for metrics. Supporting a more granular date format, such asdate_nanosdoesn't seem sensible for metrics as it would cause a big storage overhead. Most other metrics data stores also don't support more granularity than milliseconds.