How to find your log block size?

How to find your log block size?

You can find your log block size in bytes with the following query (connected as SYS or internal):
select distinct lebsz from x$kccle;


This is the unit in which you should set the log_checkpoint_interval parameter (otherwise known as the operating system block size). Some sample sizes are:
O/S Log Block Size
======= ==============

Solaris 512 bytes
HP-UX 1024 bytes
NT 512 bytes
OpenVMS 512 bytes
Digital UNIX 1024 bytes
To get it from the operating system, try grep DEV_BSIZE /usr/include/sys/param.h

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