I attempted quick review and could not come up with much except this
+ /*
+ * Calculate the amount of FPI data in the record. Each backup block
+ * takes up BLCKSZ bytes, minus the "hole" length.
+ *
+ * XXX: We peek into xlogreader's private decoded backup blocks for the
+ * hole_length. It doesn't seem worth it to add an accessor macro for
+ * this.
+ */
+ fpi_len = 0;
+ for (block_id = 0; block_id <= record->max_block_id; block_id++)
+ {
+ if (XLogRecHasCompressedBlockImage(record, block_id))
+ fpi_len += BLCKSZ - record->blocks[block_id].compress_len;
IIUC, fpi_len in case of compressed block image should be
fpi_len = record->blocks[block_id].compress_len;
Thank you,
Rahila Syed
--
View this message in context:
http://postgresql.nabble.com/Compression-of-full-page-writes-tp5769039p5829403.html
Sent from the PostgreSQL - hackers mailing list archive at Nabble.com.
--
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers
