Database Reference
In-Depth Information
Starting with Oracle 12 c , on some UNIX/Linux platforms, you can use a mixture of processes and threads.
this feature is enabled by setting the initialization THREADED_EXECUTION parameter to TRUE (the default is FALSE ). Nothing
has fundamentally changed—all of the “processes” are still there, you just might not see them via the operating system
ps command because they are now running as a thread in a larger process.
Note
So, Figure 5-4 depicts roughly what you might see if you started an Oracle instance, and mounted and opened a
database. On an operating system where Oracle implements a multiprocess architecture, such as on a UNIX/Linux
system, you can physically see these processes. After starting the instance, I observed the following:
$ ps -aef | grep ora_...._$ORACLE_SID | grep -v grep
oracle 2276 1 0 10:33 ? 00:00:00 ora_pmon_ORA12CR1
oracle 2278 1 0 10:33 ? 00:00:00 ora_psp0_ORA12CR1
oracle 2280 1 0 10:33 ? 00:00:04 ora_vktm_ORA12CR1
oracle 2284 1 0 10:33 ? 00:00:00 ora_gen0_ORA12CR1
oracle 2286 1 0 10:33 ? 00:00:00 ora_mman_ORA12CR1
oracle 2290 1 0 10:33 ? 00:00:00 ora_diag_ORA12CR1
oracle 2292 1 0 10:33 ? 00:00:00 ora_dbrm_ORA12CR1
oracle 2294 1 0 10:33 ? 00:00:00 ora_dia0_ORA12CR1
oracle 2297 1 0 10:33 ? 00:00:00 ora_dbw0_ORA12CR1
oracle 2299 1 0 10:33 ? 00:00:00 ora_lgwr_ORA12CR1
oracle 2301 1 0 10:33 ? 00:00:00 ora_ckpt_ORA12CR1
oracle 2303 1 0 10:33 ? 00:00:00 ora_lg00_ORA12CR1
oracle 2305 1 0 10:33 ? 00:00:00 ora_lg01_ORA12CR1
oracle 2307 1 0 10:33 ? 00:00:00 ora_smon_ORA12CR1
oracle 2309 1 0 10:33 ? 00:00:00 ora_reco_ORA12CR1
oracle 2311 1 0 10:33 ? 00:00:00 ora_lreg_ORA12CR1
oracle 2313 1 0 10:33 ? 00:00:01 ora_mmon_ORA12CR1
oracle 2315 1 0 10:33 ? 00:00:00 ora_mmnl_ORA12CR1
oracle 2327 1 0 10:33 ? 00:00:00 ora_p000_ORA12CR1
oracle 2329 1 0 10:33 ? 00:00:00 ora_p001_ORA12CR1
oracle 2331 1 0 10:33 ? 00:00:00 ora_tmon_ORA12CR1
oracle 2333 1 0 10:33 ? 00:00:00 ora_tt00_ORA12CR1
oracle 2335 1 0 10:33 ? 00:00:00 ora_smco_ORA12CR1
oracle 2337 1 0 10:33 ? 00:00:00 ora_fbda_ORA12CR1
oracle 2339 1 0 10:33 ? 00:00:00 ora_aqpc_ORA12CR1
oracle 2343 1 0 10:33 ? 00:00:00 ora_cjq0_ORA12CR1
oracle 2345 1 0 10:33 ? 00:00:00 ora_p002_ORA12CR1
oracle 2347 1 0 10:33 ? 00:00:00 ora_p003_ORA12CR1
oracle 2349 1 0 10:33 ? 00:00:00 ora_p004_ORA12CR1
oracle 2351 1 0 10:33 ? 00:00:00 ora_p005_ORA12CR1
oracle 2353 1 0 10:33 ? 00:00:00 ora_p006_ORA12CR1
oracle 2355 1 0 10:33 ? 00:00:00 ora_p007_ORA12CR1
oracle 2383 1 0 10:33 ? 00:00:00 ora_w000_ORA12CR1
oracle 2385 1 0 10:33 ? 00:00:00 ora_qm02_ORA12CR1
oracle 2389 1 0 10:33 ? 00:00:00 ora_q002_ORA12CR1
oracle 2391 1 0 10:33 ? 00:00:00 ora_q003_ORA12CR1
oracle 2465 1 0 10:38 ? 00:00:00 ora_w001_ORA12CR1
 
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