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Commitd17ffc7

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Count write times when extending relation files for shared buffers
Relation files extended by multiple blocks at a time have been countingthe number of blocks written, but forgot to increment the write time inthis case, as single-block write and relation extension are treated astwo different I/O operations in the shared stats: IOOP_EXTEND vsIOOP_WRITE. In this case IOOP_EXTEND was forgotten for normal(non-temporary) relations, still the number of blocks written wasincremented according to the relation extend done.Write times are tracked when track_io_timing is enabled, which is notthe case by default.Author: Nazir Bilal YavuzReviewed-by: Robert Haas, Melanie PlagemanDiscussion:https://postgr.es/m/CAN55FZ19Ss279mZuqGbuUNxka0iPbLgYuOQXqAKewrjNrp27VA@mail.gmail.comBackpatch-through: 16
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‎src/backend/utils/activity/pgstat_io.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -119,7 +119,7 @@ pgstat_count_io_op_time(IOObject io_object, IOContext io_context, IOOp io_op,
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INSTR_TIME_SET_CURRENT(io_time);
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INSTR_TIME_SUBTRACT(io_time,start_time);
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if (io_op==IOOP_WRITE)
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if (io_op==IOOP_WRITE||io_op==IOOP_EXTEND)
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{
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pgstat_count_buffer_write_time(INSTR_TIME_GET_MICROSEC(io_time));
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if (io_object==IOOBJECT_RELATION)

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