2)Getting "Aborted (core dumped)" error at the time of running pg_basebackup , (this issue is only coming on Linux32 ,not on Linux64) we have double check to confirm it . Steps to reproduce on Linux32
=================== fetch the sources apply both the patches ./configure --with-zlib --enable-debug --enable-cassert --enable-depend --prefix=$PWD/edbpsql --with-openssl CFLAGS="-g -O0"; make all install Performed initdb with switch "--wal-segsize 4"
Does the crash occur with only size 4?
Crash occurs for the value of "--wal-segsize " 1, 2, 4, 8 with stack details as below :
For value the value of "--wal-segsize " 16, 32, 64... (all multiple of 16) we are getting "Segmentation fault" message as below: [bin]$ ./pg_basebackup -v -D /tmp/slave16 Segmentation fault (core dumped)
and for all other values of "--wal-segsize " 3, 5, 7, 9, 10, 11, ... 15, 17, 18, ... we are getting invalid message during "initdb": [bin]$ ./initdb -D data1 --wal-segsize=17 initdb: Invalid WAL segment size 17
The permissible values for the wal-segment size is power of 2 from 1 to 1024. Hence the Invalid message is expected behaviour.
Just to summarize, In Linux32, values 1 to 8 crashed and 16 to 1024 gave segmentation fault.
same scenario is working fine against HEAD (v10 ) on Linux32 [i.e no patch applied]
[centos@tushar-centos bin]$ ./pg_basebackup --verbose -D /tmp/slave11 pg_basebackup: initiating base backup, waiting for checkpoint to complete pg_basebackup: checkpoint completed pg_basebackup: transaction log start point: 0/2800024 on timeline 1 pg_basebackup: starting background WAL receiver pg_basebackup: transaction log end point: 0/28000E4 pg_basebackup: waiting for background process to finish streaming ... pg_basebackup: base backup completed [centos@tushar-centos bin]$
Just to confirm, was this done with configure flag --with-wal-segsize=4 ?
we also have configure with the option "--with-wal-segsize=4" and getting warning. ./configure --with-zlib --enable-debug --enable-cassert --enable-depend --prefix=$PWD/inst --with-openssl CFLAGS="-g -O0" --with-wal-segsize=4
