以下脚本可以用于收集Oracle Streams进程的内存使用信息, 便于诊断因memory leak引起的内存问题:
ps auxgw | sort -n +5 | tail -10
select a.apply_name,
a.server_id,
b.sid,
b.program,
c.spid,
trunc(c.pga_used_mem / (1024 * 1024), 2) PGA_USED,
trunc(c.pga_alloc_mem / (1024 * 1024), 2) PGA_ALLOC,
trunc(c.pga_freeable_mem / (1024 * 1024), 2) PGA_FREE,
trunc(c.pga_max_mem / (1024 * 1024), 2) PGA_MAX
from v$streams_apply_server a, v$process c, v$session b
where a.sid = b.sid
and b.paddr = c.addr
order by 1, 2;
SELECT p.spid spid,
'C00' || c.capture# || ' ' || upper(lp.role) as process,
c.capture_name "Capture Name",
s.sid,
s.program,
trunc(p.pga_used_mem / (1024 * 1024), 2) PGA_USED,
trunc(p.pga_alloc_mem / (1024 * 1024), 2) PGA_ALLOC,
trunc(p.pga_freeable_mem / (1024 * 1024), 2) PGA_FREE,
trunc(p.pga_max_mem / (1024 * 1024), 2) PGA_MAX
FROM v$streams_capture c, v$logmnr_process lp, v$session s, v$process p
WHERE c.logminer_id = lp.session_id
AND lp.role in ('reader', 'preparer', 'builder')
AND lp.sid = s.sid
AND lp.serial# = s.serial#
AND s.paddr = p.addr
order by capture_name, process;
sqlplus / as sysdba
oradebug setospid $PID
oradebug unlimit
oradebug dump heapdump 536870917
oradebug tracefile_name