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more tuneables for destinations

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@Dieterbe Dieterbe released this 16 Aug 07:29
· 679 commits to master since this release

these new settings were previously hardcoded (to the values that are now the defaults):

connbuf=<int>                 connection buffer (how many metrics can be queued, not written into network conn). default 30k
iobuf=<int>                   buffered io connection buffer in bytes. default: 2M
spoolbuf=<int>                num of metrics to buffer across disk-write stalls. practically, tune this to number of metrics in a second. default: 10000
spoolmaxbytesperfile=<int>    max filesize for spool files. default: 200MiB (200 * 1024 * 1024)
spoolsyncevery=<int>          sync spool to disk every this many metrics. default: 10000
spoolsyncperiod=<int>         sync spool to disk every this many milliseconds. default 1000
spoolsleep=<int>              sleep this many microseconds(!) in between ingests from bulkdata/redo buffers into spool. default 500
unspoolsleep=<int>            sleep this many microseconds(!) in between reads from the spool, when replaying spooled data. default 10