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takes digits (bits 20-24 as FIXED's), an integer's last N digits written after a point (1234 at two is 12.34, -5 -0.05, 0 0.00; width and zeros after the sign), verification allowing digits on FIXED and DECIMAL alone; unit test: ten rows of formats_and_held (-2^63 at two, 25 digits, a number's whole 1234, its 12.5 a limit); TPC-C's money i64 cents and its rates ten-thousandths (tables, messages, load, the transactions), SQLite's INTEGER columns and int64 bindings alike, the comparison now exact (no 1e-9 tolerance): after 20,000 transactions every row of every table the same (grouped SQLite too) and 3.3.2 holding on both; counts: b45 against b44 BFS without batches +0.09%, the rest within 0.001%; the bank's queries (s44 and s45 in turns, six each) in_credit -0.59%, per_branch -0.34%, ranks -0.20%, the rest within 0.01%, the seven answers the same bytes; 008 (NUM_TEXT's digits, a message row's i64 cells), 027 and 092
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With four warehouses the order lines answered at once (about 140 MB of
JSON) outgrew pure-serve's 64 MiB budget, and the check stopped with
503; a larger budget would have left the answer's memory in the
resident size measured after.
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Its default, each 1,000 pages, is 1 MB of WAL with the 1 KiB pages the
SD card favours: grouped commits there went from 203 to 694 a second,
and in RAM a thread's p99 from 1.2 to 0.2 ms (docs/research/106).
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run costs
The terminals hand their writing transactions to one writer, which runs
those waiting in one transaction, each in a savepoint, and commits them
with one sync; reads stay on the terminals' connections, as pure-serve
shows views from the last save. An undone New-Order is rolled back by
its caller now (it rolled back the whole group before, and counted as
failed after the split). Each run reports its CPU a transaction, the
owner thread's share of a core, its memory, and the bytes a transaction
had written, by the process and to the device. SQLite runs with its
database mapped, a 64 MiB cache and savepoint journals in memory unless
told otherwise.
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and an SD card
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