concurrency tagged posts

Recap for Concurrency: Tracking Database Changes

We talked how to track database changes with one auditing table last month. If we want to replicate these changes into another database, then we might use multi-threading to gain the high performance in data ingestion. However, based on our previous design, we track changes to column level, which generates a serious concurrency control issue. Let’s think about, we have a data table, with 10 columns updates at once, then all these changes are captured and inserted into my_audit_table. If at the same time, another table gets updated, then there might have some cross inserting in my_audit_table, which makes the multi-threading read even harder.

Is there a better approach that we should go? In this case, it’s worth to re-design the audit_table. Let’s see how it looks like (in Oracle PL/SQL):

c...
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