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This should improve vmselect performance scalability on systems with many CPU cores. The following tasks were done: - Use separate temporary files for storing the data read from each vmstorage node. This may result in the following potential issues: - Up to N times higher memory usage for performing each query where N is the number of vmstorage nodes known to vmselect. This issue shouldn't increase chances of out of memory errors in most cases, since per-query memory overhead is quite low comparing to the overall vmselect memory usage. - Up to N times higher number of open temporary files where N is the number of vmstorage nodes known to vmselect. This issue should be fixed by increasing the limit on the number of open files. - Use separate counters per each vmstorage node for various stats calculation when reading the data from vmstorage nodes. |
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netstorage_test.go | ||
netstorage_timing_test.go | ||
netstorage.go | ||
tmp_blocks_file_test.go | ||
tmp_blocks_file.go |