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lightningd: allow a connection to specify db batching.

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Previous commit was a hack which *always* batched where possible, this
is a more sophisticated opt-in varaint, with a timeout sanity check.

Final performance for cleaning up 1M pays/forwards/invoices:

```
$ time l1-cli autoclean-once succeededpays 1
{
   "autoclean": {
      "succeededpays": {
         "cleaned": 1000000,
         "uncleaned": 26895
      }
   }
}

real	6m9.828s
user	0m0.003s
sys	0m0.001s
$ time l2-cli autoclean-once succeededforwards 1
{
   "autoclean": {
      "succeededforwards": {
         "cleaned": 1000000,
         "uncleaned": 40
      }
   }
}

real	3m20.789s
user	0m0.004s
sys	0m0.001s
$ time l3-cli autoclean-once paidinvoices 1
{
   "autoclean": {
      "paidinvoices": {
         "cleaned": 1000000,
         "uncleaned": 0
      }
   }
}

real	6m47.941s
user	0m0.001s
sys	0m0.000s
```

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Added: JSON-RPC: `batching` command to allow database transactions to cross multiple back-to-back JSON commands.
This commit is contained in:
Rusty Russell
2022-09-19 10:24:23 +09:30
committed by Christian Decker
parent 555b8a2f7a
commit fa7d732ba6
9 changed files with 167 additions and 11 deletions
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3
plugins/autoclean.c
View File

@@ -552,6 +552,9 @@ static const char *init(struct plugin *p,
rpc_scan_datastore_str(plugin, datastore_path(tmpctx, i, "num"),
JSON_SCAN(json_to_u64, &total_cleaned[i]));
}
/* Optimization FTW! */
rpc_enable_batching(p);
return NULL;
}