Recall depends on multiple factors like number of vectors, number of dimensions, segments, and so on. Note: This is an expert-level setting that requires closing the index before updating the setting and reopening it after the update.
#SPIKE PERFORMANCE AND TUNING UPDATE#
To change the default list of extensions set by the plugin, update the .extensions setting at the cluster level using the Cluster Settings API. The mmap file I/O uses the system file cache rather than memory allocated for the Java heap, so no additional allocation is required. For more information about these file extensions, see the Lucene documentation. The two file extensions specific to vector values that use mmap are. This leads to fast file I/O operations and improves the overall performance of both data ingestion and search. Starting with version 2.5, k-NN enables mmap file I/O by default when the store type is hybridfs (the default store type in OpenSearch). In versions 2.4 and earlier of the Lucene-based approximate k-NN search, read/write operations were based on Java NIO by default, which can be slow, depending on the Lucene version and number of segments per shard. Instead, the plugin relies on the existing caching mechanism in OpenSearch core. If your use case is simply to read the IDs and scores of the nearest neighbors, you can disable reading stored fields, which saves time retrieving the vectors from stored fields.įor the Lucene-based approximate k-NN search, there is no dedicated cache layer that speeds up read/write operations. If a merge or refresh operation finishes after the API runs, or if you add new documents, you need to rerun the API to load those native library indexes into memory. Note: This API operation only loads the segments of the indexes it sees into the cache. The warmup API operation loads all native library indexes for all shards (primary and replica) for the specified indexes into the cache, so there’s no penalty to load native library indexes during initial searches. I’m typing this on the cell else I’d go into more detail on the e85.PUT //_settings Normally I’d say this was an acceleration enrichment problem but this happens after the enrichment is over. It moves around to different VE cells depending on the rpm you floor it at. The lean spot only happens when you floor it, not during the rest of the run. I’m thinking the lean spot I’m seeing is either related to a pump that can’t keep up or a bad regulator or spark blowout. My pump gas and e85 maps are sorted out and blend together based on the ethanol percentage. Do that on lh2.4 without any changes to the map and you’ll run lean enough to burn a piston. To go from e10 to e85 like I said you need about 50%or so more fuel. You can’t just dump in a bunch of e85 into pump gas and expect everything to be fine. There are a number of ways to do it and I won’t go into it. The deal with e85 is that you leave the wideband alone and just multiply the ve table by 40-50% until the afr you’re expecting shows up on the wideband. assuming it's all kosher but I am going to pick up a transducer and start logging.īad regulator? dying pump? Spark blowout? decreasing gap to 0.022 (a 0.55mm guitar pick) thinking it was spark blowout or a lean misfire, nothing doing.
normally I only ever get to 55% (I live 45 min from the closest e85 station). Now that I'm at 75% the spikes are more pronounced. I noticed the spike in the logs when I started tuning with e85. I've already tried playing with acceleration enrichments but that had no effect. THe lean spike is dependent on what RPM I floor it. pumping up the VE in those spots on the MAP does not make any changes.
This thing is spiking hard lean when I slam on the throttle. Needless to say, I never saw the lean spike on pump gas. I tuned the VE1 on pump gas and multiplied the entire map by about 50% to get it right until the blended afr matched what I was seeing on pump gas. This is a flex fuel setup where I blend VE1-VE3. Tuning the 16v+t at about 75% ethanol in the tank. Gang, I have a curious problem that's appeared.
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