* lib/logstorage: prevent from panic during background merge
Fixes panic during background merge when resulting block would contain more columns than maxColumnsPerBlock.
Buffered data will be flushed and replaced by the next block.
See: https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4762
Signed-off-by: Zakhar Bessarab <z.bessarab@victoriametrics.com>
* lib/logstorage: clarify field description and comment
Signed-off-by: Zakhar Bessarab <z.bessarab@victoriametrics.com>
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Signed-off-by: Zakhar Bessarab <z.bessarab@victoriametrics.com>