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Improve MySQL Snapshot #1303

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altmannmarcelo opened this issue Jun 26, 2024 · 0 comments
Closed

Improve MySQL Snapshot #1303

altmannmarcelo opened this issue Jun 26, 2024 · 0 comments
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Description

Currently we run a SELECT * FROM table to do snapshot. This works fine for small tables, but we should adjust it to take advantage of PK/UK and fetch data in batches.

Change in user-visible behavior

Requires documentation change
@altmannmarcelo altmannmarcelo self-assigned this Jun 26, 2024
readysetbot pushed a commit that referenced this issue Jul 2, 2024
@altmannmarcelo
replicators: Enhance MySQL Snapshot.
053a0f1 
Adjust the MySQL snapshot to use the new snapshot type. The snapshot
type checks if table has a primary key or unique key and uses it to
define batches to query the table, making it less intrusive, specially
for large tables. In case the table does not have a primary key or
unique key, the snapshot will do a full table scan.

Fixes: REA-4477
Fixes: #1303

Release-Note-Core: Enhance MySQL snapshot to use Primary Key or unique
   key when available. This makes the snapshot less intrusive than a
   `SELECT *` (Full Table Scan) for large tables.

Change-Id: Iafda6ea6c74888262a0eea8bc1e880a3214b068a
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