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ircd::db: Variable per-column write buffer derived from block size.

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This commit is contained in:
Jason Volk 2020-09-12 20:23:24 -07:00
parent 38a6a1049d
commit ed01ed05dc
1 changed files with 13 additions and 1 deletions
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14
ircd/db.cc
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@ -2075,8 +2075,20 @@ ircd::db::database::column::column(database &d,
//this->options.bottommost_compression_opts = this->options.compression_opts;
//TODO: descriptor / conf
static const auto write_buffer_blocks{2048L};
static const long write_buffer_size_minmax[]
{
256_KiB, 4_MiB
};
// Derive the write buffer size from the block size
this->options.write_buffer_size = std::clamp
(
write_buffer_blocks * long(this->descriptor->block_size),
write_buffer_size_minmax[0],
write_buffer_size_minmax[1]
);
this->options.write_buffer_size = 1_MiB;
this->options.max_write_buffer_number = 16;
this->options.min_write_buffer_number_to_merge = 2;
this->options.max_write_buffer_number_to_maintain = 8;