[8.x] ESQL: Expand HeapAttack for LOOKUP (#120754) #121448
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* ESQL: Expand HeapAttack for LOOKUP This expands the heap attack tests for LOOKUP. Now there are three flavors: 1. LOOKUP a single geo_point - about 30 bytes or so. 2. LOOKUP a one mb string. 3. LOOKUP no fields - just JOIN to alter cardinality. Fetching a geo_point is fine with about 500 repeated docs before it circuit breaks which works out to about 256mb of buffered results. That's sensible on our 512mb heap and likely to work ok for most folks. We'll flip to a streaming method eventually and this won't be a problem any more. But for now, we buffer. The no lookup fields is fine with like 7500 matches per incoming row. That's quite a lot, really. The 1mb string is trouble! We circuit break properly which is great and safe, but if you join 1mb worth of columns in LOOKUP you are going to need bigger heaps than our test. Again, we'll move from buffering these results to streaming them and it'll work better, but for now we buffer. * updates
nik9000
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Backports the following commits to 8.x: