Now
I thought it's something else but after now testing it 5 days non stop it seems 100% sure that it's oracle.

If I compile ANY version ogf PHP, including the latest snaps with OCI8 or Oracle support, apache immediately crashes after startup. Discussing with a whole bunch of people we came to the point that it's a threading error.

Here is the backtrace :

[root@parmastocks1 /root]# gdb /usr/sbin/httpd /core
GNU gdb 4.18
Copyright 1998 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-redhat-linux"...(no debugging symbols found)...
Core was generated by `httpd -DSSL'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /lib/libm.so.6...done.
Reading symbols from /lib/libcrypt.so.1...done.
Reading symbols from /lib/libdb.so.3...done.
Reading symbols from /usr/local/lib/libmm.so.10...done.
Reading symbols from /lib/libdl.so.2...done.
Reading symbols from /lib/libc.so.6...done.
Reading symbols from /lib/ld-linux.so.2...done.
Reading symbols from /lib/libnss_files.so.2...done.
Reading symbols from /usr/lib/apache/mod_mmap_static.so...done.
Reading symbols from /usr/lib/apache/mod_vhost_alias.so...done.
Reading symbols from /usr/lib/apache/mod_env.so...done.
Reading symbols from /usr/lib/apache/mod_define.so...done.
Reading symbols from /usr/lib/apache/mod_log_config.so...done.
Reading symbols from /usr/lib/apache/mod_log_agent.so...done.
Reading symbols from /usr/lib/apache/mod_log_referer.so...done.
Reading symbols from /usr/lib/apache/mod_mime_magic.so...done.
Reading symbols from /usr/lib/apache/mod_mime.so...done.
Reading symbols from /usr/lib/apache/mod_negotiation.so...done.
Reading symbols from /usr/lib/apache/mod_status.so...done.
Reading symbols from /usr/lib/apache/mod_info.so...done.
Reading symbols from /usr/lib/apache/mod_include.so...done.
Reading symbols from /usr/lib/apache/mod_autoindex.so...done.
Reading symbols from /usr/lib/apache/mod_dir.so...done.
Reading symbols from /usr/lib/apache/mod_cgi.so...done.
Reading symbols from /usr/lib/apache/mod_asis.so...done.
Reading symbols from /usr/lib/apache/mod_imap.so...done.
Reading symbols from /usr/lib/apache/mod_actions.so...done.
Reading symbols from /usr/lib/apache/mod_speling.so...done.
Reading symbols from /usr/lib/apache/mod_userdir.so...done.
Reading symbols from /usr/lib/apache/mod_alias.so...done.
---Type <return> to continue, or q <return> to quit---
Reading symbols from /usr/lib/apache/mod_rewrite.so...done.
Reading symbols from /usr/lib/apache/mod_access.so...done.
Reading symbols from /usr/lib/apache/mod_auth.so...done.
Reading symbols from /usr/lib/apache/mod_auth_anon.so...done.
Reading symbols from /usr/lib/apache/mod_auth_dbm.so...done.
Reading symbols from /usr/lib/apache/mod_auth_db.so...done.
Reading symbols from /usr/lib/apache/mod_digest.so...done.
Reading symbols from /usr/lib/apache/libproxy.so...done.
Reading symbols from /usr/lib/apache/mod_cern_meta.so...done.
Reading symbols from /usr/lib/apache/mod_expires.so...done.
Reading symbols from /usr/lib/apache/mod_headers.so...done.
Reading symbols from /usr/lib/apache/mod_usertrack.so...done.
Reading symbols from /usr/lib/apache/mod_example.so...done.
Reading symbols from /usr/lib/apache/mod_unique_id.so...done.
Reading symbols from /usr/lib/apache/mod_setenvif.so...done.
Reading symbols from /usr/lib/apache/libssl.so...done.
Reading symbols from /usr/lib/libssl.so.0...done.
Reading symbols from /usr/lib/libcrypto.so.0...done.
Reading symbols from /usr/lib/apache/libphp4.so...done.
Reading symbols from /usr/lib/libgdbm.so.2...done.
Reading symbols from /opt/oracle/ora01/app/oracle/product/8.1.5/lib/libclntsh.so.8.0...done.
Reading symbols from /lib/libpam.so.0...done.
Reading symbols from /usr/lib/libz.so.1...done.
Reading symbols from /usr/lib/libreadline.so.3...done.
Reading symbols from /usr/lib/libhistory.so.3...done.
Reading symbols from /usr/lib/libncurses.so.4...done.
Reading symbols from /usr/lib/libgd.so.1...done.
Reading symbols from /lib/libresolv.so.2...done.
Reading symbols from /lib/libnsl.so.1...done.
Reading symbols from /lib/libpthread.so.0...done.
Reading symbols from /lib/libtermcap.so.2...done.
#0  0x40b17780 in ?? ()
(gdb)
(gdb) bt
#0  0x40b17780 in ?? ()
#1  0x400fd070 in _IO_new_file_xsputn (f=0x40195280, data=0xbfffba80, n=163) at fileops.c:328
#2  0x400f99e7 in fputs () at iofputs.c:46
#3  0x8058e46 in ap_error_log2stderr ()
#4  0x8058ea1 in ap_log_error ()
#5  0x805040d in ap_get_server_built ()
#6  0x80542f4 in ap_clear_module_list ()
#7  0x80548c9 in ap_handle_command ()
#8  0x8054918 in ap_srm_command_loop ()
#9  0x8054c43 in ap_process_resource_config ()
#10 0x80552b4 in ap_read_config ()
#11 0x805bfa2 in ap_child_terminate ()
#12 0x805c65f in main ()
#13 0x400bf94b in __libc_start_main () at ../sysdeps/generic/libc-start.c:122
(gdb)