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  5. Your Galera cluster’s hardest problem was never the replication library
Your Galera cluster’s hardest problem was never the replication library
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Your Galera cluster’s hardest problem was never the replication library

Ask anyone who runs a multi-node MySQL Galera Cluster in production about their worst night. Almost nobody says write-set replication was wrong. They say something closer to this: “All queries piling up… no error messages in logs.” Twenty…

DatabasesPercona Database BlogPublished: October 8, 2026
Databases
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Andrei Lepikhov: Why is PostgreSQL's Numeric Type so Slow?

The numeric type has existed in Postgres for more than 25 years. Over that time, it has undergone many optimisations and refinements. And yet operations on this type - aggregation in particular - still look rather inefficient.Since the…

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Grab Redesigns Counter Service Storage for 50% Lower P99 Latency

Grab migrated its high-volume Counter Service from a wide column database to Aerospike using storage abstraction, shadow traffic, data parity validation, and gradual traffic migration. The redesigned data model consolidated time buckets…

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