bts_tracelevel() 函数

bts_tracelevel() 函数用于设置跟踪级别。此函数与 bts_tracefile() 函数一起使用来跟踪 Basic Text Search 的相关事件。

语法

level
跟踪输出的级别：
1
UDR 入口点。
10
UDR 入口点和较低级别的调用。
20
跟踪信息和小事件。
100
内存资源跟踪（极详细）。

如果输入 1-9 的值，将把该值视为级别 1，而 10 与 19 之间的值则视为识别 10，20 与 99 之间的值视为级别 20。大于或等于 100 的值视为级别 100。

用途

bts_tracelevel() 函数用于对与 GBase 8s Basic Text Search DataBlade 模块有关的事件进行故障诊断。

有关 bts_tracefile() 的语法，请参阅 bts_tracefile() 函数。

有关跟踪的更多详细信息，请参阅《GBase 8s SQL 指南：参考》。

示例

以下示例指定一个跟踪文件，将跟踪级别设置为 20，然后执行 SELECT 语句，从而生成一个跟踪日志：
EXECUTE FUNCTION bts_tracefile('/tmp/bts_select.log');
EXECUTE FUNCTION bts_tracelevel(20);
SELECT * FROM vessels WHERE bts_contains(xml_info, 'boatname:black');
下面是跟踪级别 20 的跟踪日志可能出现的内容。数字 32 为跟踪会话号。
============================================================

Tracing session: 32 on 03/26/2009

09:21:11  BTS[32] bts_tracelevel_set: exit  (level = 20, status = 0)
09:21:11  BTS[32] bts_am_cost: entry 
09:21:11  BTS[32] bts_am_cost: exit  (status = 0, cost = 0.500000)
09:21:11  BTS[32] bts_am_open: entry 
09:21:11  BTS[32] bts_init: entry 
09:21:11  BTS[32] bts_lock_try: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: exit  (lock name: 'BTS_LOCK-EVP', status = 0)
09:21:11  BTS[32] bts_lock_try: exit  (status = 0)
09:21:11  BTS[32] bts_cl_init: entry (bts_cl_init_value = 0)
09:21:11  BTS[32] bts_cl_init_restore: entry 
09:21:11  BTS[32] bts_cl_init_setup: entry 
09:21:11  BTS[32] bts_cl_init_setup: exit  (status = 0)
09:21:11  BTS[32] bts_cl_init_restore: exit  (status = 0)
09:21:11  BTS[32] bts_cl_init: exit  (bts_cl_init_value = 1, status = 0)
09:21:11  BTS[32] bts_gls_init: entry 
09:21:11  BTS[32] bts_gls_init: exit  (status = 0)
09:21:11  BTS[32] bts_evp_check: entry 
09:21:11  BTS[32] bts_evp_check: exit  (status = 0)
09:21:11  BTS[32] bts_auto_trace: (skipped)
09:21:11  BTS[32] bts_init: exit  (status = 0)
09:21:11  BTS[32] bts_am_spacename: entry 
09:21:11  BTS[32] bts_am_spacename: exit  (spacename = 'bts_sbspace1', status = 0)
09:21:11  BTS[32] bts_am_space: entry 
09:21:11  BTS[32] bts_am_sbspace: entry 
09:21:11  BTS[32] bts_am_sbspace: exit  (rtn = '/ashworth/vessels_bts/1048885', status = 0)
09:21:11  BTS[32] bts_am_space: exit  (rtn = '/ashworth/vessels_bts/1048885', status = 0)
09:21:11  BTS[32] bts_hdr_check: entry 
09:21:11  BTS[32] bts_hdr_check: (hdr_status mask = 00000000)
09:21:11  BTS[32] bts_hdr_check: exit  (status = 0)
09:21:11  BTS[32] bts_lock_try: entry (name = '/ashworth/vessels_bts/1048885')
09:21:11  BTS[32] bts_lock_try: exit  (status = 0)
09:21:11  BTS[32] bts_am_params_read: entry 
09:21:11  BTS[32] bts_am_params_canonical_maps_setup: entry 
09:21:11  BTS[32] bts_am_params_canonical_maps_setup: (expand = 1)
09:21:11  BTS[32] bts_am_params_canonical_maps_setup: exit  (status = 0)
09:21:11  BTS[32] bts_am_params_read: exit  (status = 0)
09:21:11  BTS[32] bts_lock_release: entry (name = '/ashworth/vessels_bts/1048885')
09:21:11  BTS[32] bts_lock_release: exit  (status = 0)
09:21:11  BTS[32] bts_am_open: (open set_size 256)
09:21:11  BTS[32] bts_xact_register: entry 
09:21:11  BTS[32] bts_xact_register: (XACT: named_memory(BTS_XACT_20))
09:21:11  BTS[32] bts_xact_register: (new savepoint: 1-1 (first))
09:21:11  BTS[32] bts_xact_register: (register savepoint callback)
09:21:11  BTS[32] bts_xact_register: (register end_stmt callback)
09:21:11  BTS[32] bts_xact_register: (register end_xact callback)
09:21:11  BTS[32] bts_xact_register: (register post_xact callback)
09:21:11  BTS[32] bts_xact_register: exit  (status = 0)
09:21:11  BTS[32] bts_xact_log_params: entry 
09:21:11  BTS[32] bts_xact_init_bxt: exit  (status = 0)
09:21:11  BTS[32] bts_am_params_copy: exit  (status = 0)
09:21:11  BTS[32] bts_xact_log_params: (XACT: sbspace(bts_sbspace1))
09:21:11  BTS[32] bts_xact_log_params: (XACT: space_type(1))
09:21:11  BTS[32] bts_xact_log_params: exit  (status = 0)
09:21:11  BTS[32] bts_fini: entry (errcode = 0)
09:21:11  BTS[32] bts_cl_fini: entry (bts_cl_init_value = 1)
09:21:11  BTS[32] bts_cl_init_clear: entry 
09:21:11  BTS[32] bts_cl_init_clear: exit  (status = 0)
09:21:11  BTS[32] bts_cl_fini: exit  (bts_cl_init_value = 0, status = 0)
09:21:11  BTS[32] bts_lock_release: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: exit  (lock name: 'BTS_LOCK-EVP', status = 0)
09:21:11  BTS[32] bts_lock_release: exit  (status = 0)
09:21:11  BTS[32] bts_fini: exit  (status = 0)
09:21:11  BTS[32] bts_am_open: exit  (status = 0)
09:21:11  BTS[32] bts_am_beginscan: entry 
09:21:11  BTS[32] bts_am_userdata_get: entry 
09:21:11  BTS[32] bts_am_spacename: entry 
09:21:11  BTS[32] bts_am_spacename: exit  (spacename = 'bts_sbspace1', status = 0)
09:21:11  BTS[32] bts_am_userdata_get: (target = '/ashworth/vessels_bts/1048885')
09:21:11  BTS[32] bts_am_userdata_get: exit  (status = 0)
09:21:11  BTS[32] bts_am_beginscan: (target = '/ashworth/vessels_bts/1048885')
09:21:11  BTS[32] bts_am_literal: entry 
09:21:11  BTS[32] bts_am_literal_size: entry 
09:21:11  BTS[32] bts_am_literal_size: exit  (status = 0)
09:21:11  BTS[32] bts_am_literal_cat: entry 
09:21:11  BTS[32] bts_am_literal_cat: exit  (status = 0)
09:21:11  BTS[32] bts_am_literal: (literal is 'boatname:black')
09:21:11  BTS[32] bts_am_literal: exit  (status = 0)
09:21:11  BTS[32] bts_am_beginscan: (literal = 'boatname:black')
09:21:11  BTS[32] bts_am_beginscan: (rows = 256, score needed = 'no')
09:21:11  BTS[32] bts_am_beginscan: exit  (status = 0)
09:21:11  BTS[32] bts_am_getnext: entry 
09:21:11  BTS[32] bts_init: entry 
09:21:11  BTS[32] bts_lock_try: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: exit  (lock name: 'BTS_LOCK-EVP', status = 0)
09:21:11  BTS[32] bts_lock_try: exit  (status = 0)
09:21:11  BTS[32] bts_cl_init: entry (bts_cl_init_value = 0)
09:21:11  BTS[32] bts_cl_init_restore: entry 
09:21:11  BTS[32] bts_cl_init_restore: exit  (status = 0)
09:21:11  BTS[32] bts_cl_init: exit  (bts_cl_init_value = 1, status = 0)
09:21:11  BTS[32] bts_gls_init: entry 
09:21:11  BTS[32] bts_gls_init: exit  (status = 0)
09:21:11  BTS[32] bts_evp_check: entry 
09:21:11  BTS[32] bts_evp_check: exit  (status = 0)
09:21:11  BTS[32] bts_auto_trace: (skipped)
09:21:11  BTS[32] bts_init: exit  (status = 0)
09:21:11  BTS[32] bts_lock_try: entry (name = '/ashworth/vessels_bts/1048885')
09:21:11  BTS[32] bts_lock_try: exit  (status = 0)
09:21:11  BTS[32] bts_cl_query: entry 
09:21:11  BTS[32] bts_cl_query_setup: entry 
09:21:11  BTS[32] bts_xact_get_cl_cb: entry 
09:21:11  BTS[32] bts_xact_get_cl_cb: exit  (status = 0)
09:21:11  BTS[32] bts_cl_query_parse: entry 
09:21:11  BTS[32] bts_cl_query_dump: entry 
09:21:11  BTS[32] bts_cl_query_dump: (max clause count = 1024)
09:21:11  BTS[32] bts_cl_query_dump: (query default operator = '0' (or))
09:21:11  BTS[32] bts_cl_query_dump: (query = 'boatname:black')
09:21:11  BTS[32] bts_cl_query_dump: (keyfield = 'boatname')
09:21:11  BTS[32] bts_cl_query_dump: exit  (status = 0)
09:21:11  BTS[32] bts_cl_query_parse: exit  (status = 0)
09:21:11  BTS[32] bts_cl_query_setup: exit  (status = 0)
09:21:11  BTS[32] bts_cl_query_parse: entry 
09:21:11  BTS[32] bts_cl_query_parse: exit  (status = 0)
09:21:11  BTS[32] bts_cl_query: exit  (status = 0)
09:21:11  BTS[32] bts_am_getnext: (return 0 (0) fragid = 1048884, rowid = 257)
09:21:11  BTS[32] bts_lock_release: entry (name = '/ashworth/vessels_bts/1048885')
09:21:11  BTS[32] bts_lock_release: exit  (status = 0)
09:21:11  BTS[32] bts_fini: entry (errcode = 0)
09:21:11  BTS[32] bts_cl_fini: entry (bts_cl_init_value = 1)
09:21:11  BTS[32] bts_cl_init_clear: entry 
09:21:11  BTS[32] bts_cl_init_clear: exit  (status = 0)
09:21:11  BTS[32] bts_cl_fini: exit  (bts_cl_init_value = 0, status = 0)
09:21:11  BTS[32] bts_lock_release: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: exit  (lock name: 'BTS_LOCK-EVP', status = 0)
09:21:11  BTS[32] bts_lock_release: exit  (status = 0)
09:21:11  BTS[32] bts_fini: exit  (status = 0)
09:21:11  BTS[32] bts_am_getnext: exit  (status = 1)
09:21:11  BTS[32] bts_am_getnext: entry 
09:21:11  BTS[32] bts_init: entry 
09:21:11  BTS[32] bts_lock_try: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: exit  (lock name: 'BTS_LOCK-EVP', status = 0)
09:21:11  BTS[32] bts_lock_try: exit  (status = 0)
09:21:11  BTS[32] bts_cl_init: entry (bts_cl_init_value = 0)
09:21:11  BTS[32] bts_cl_init_restore: entry 
09:21:11  BTS[32] bts_cl_init_restore: exit  (status = 0)
09:21:11  BTS[32] bts_cl_init: exit  (bts_cl_init_value = 1, status = 0)
09:21:11  BTS[32] bts_gls_init: entry 
09:21:11  BTS[32] bts_gls_init: exit  (status = 0)
09:21:11  BTS[32] bts_evp_check: entry 
09:21:11  BTS[32] bts_evp_check: exit  (status = 0)
09:21:11  BTS[32] bts_auto_trace: (skipped)
09:21:11  BTS[32] bts_init: exit  (status = 0)
09:21:11  BTS[32] bts_lock_try: entry (name = '/ashworth/vessels_bts/1048885')
09:21:11  BTS[32] bts_lock_try: exit  (status = 0)
09:21:11  BTS[32] bts_cl_query: entry 
09:21:11  BTS[32] bts_cl_query_next: entry 
09:21:11  BTS[32] bts_cl_query_parse: entry 
09:21:11  BTS[32] bts_cl_query_parse: exit  (status = 0)
09:21:11  BTS[32] bts_cl_query_next: exit  (status = 0)
09:21:11  BTS[32] bts_cl_query_parse: entry 
09:21:11  BTS[32] bts_cl_query_parse: exit  (status = 0)
09:21:11  BTS[32] bts_cl_query: exit  (status = 0)
09:21:11  BTS[32] bts_lock_release: entry (name = '/ashworth/vessels_bts/1048885')
09:21:11  BTS[32] bts_lock_release: exit  (status = 0)
09:21:11  BTS[32] bts_fini: entry (errcode = 0)
09:21:11  BTS[32] bts_cl_fini: entry (bts_cl_init_value = 1)
09:21:11  BTS[32] bts_cl_init_clear: entry 
09:21:11  BTS[32] bts_cl_init_clear: exit  (status = 0)
09:21:11  BTS[32] bts_cl_fini: exit  (bts_cl_init_value = 0, status = 0)
09:21:11  BTS[32] bts_lock_release: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: exit  (lock name: 'BTS_LOCK-EVP', status = 0)
09:21:11  BTS[32] bts_lock_release: exit  (status = 0)
09:21:11  BTS[32] bts_fini: exit  (status = 0)
09:21:11  BTS[32] bts_am_getnext: exit  (status = 0)
09:21:11  BTS[32] bts_xact_end_stmt: entry 
09:21:11  BTS[32] bts_xact_bxh_init: entry 
09:21:11  BTS[32] bts_xact_bxh_init: (XACT: named_memory(BTS_XACT_20))
09:21:11  BTS[32] bts_xact_bxh_init: exit  (status = 0, bxh = 0x53661ce8)
09:21:11  BTS[32] bts_init: entry 
09:21:11  BTS[32] bts_lock_try: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: exit  (lock name: 'BTS_LOCK-EVP', status = 0)
09:21:11  BTS[32] bts_lock_try: exit  (status = 0)
09:21:11  BTS[32] bts_cl_init: entry (bts_cl_init_value = 0)
09:21:11  BTS[32] bts_cl_init_restore: entry 
09:21:11  BTS[32] bts_cl_init_restore: exit  (status = 0)
09:21:11  BTS[32] bts_cl_init: exit  (bts_cl_init_value = 1, status = 0)
09:21:11  BTS[32] bts_gls_init: entry 
09:21:11  BTS[32] bts_gls_init: exit  (status = 0)
09:21:11  BTS[32] bts_evp_check: entry 
09:21:11  BTS[32] bts_evp_check: exit  (status = 0)
09:21:11  BTS[32] bts_auto_trace: (skipped)
09:21:11  BTS[32] bts_init: exit  (status = 0)
09:21:11  BTS[32] bts_xact_end_stmt: (procesing current_stmt: 1)
09:21:11  BTS[32] bts_xact_process: entry 
09:21:11  BTS[32] bts_xact_process: (process: NORMAL_END)
09:21:11  BTS[32] bts_xact_process: (process end_stmt: 1)
09:21:11  BTS[32] bts_xact_process: (current savepoint is 1-1)
09:21:11  BTS[32] bts_lock_try: entry (name = '/ashworth/vessels_bts/1048885')
09:21:11  BTS[32] bts_lock_try: exit  (status = 0)
09:21:11  BTS[32] bts_lock_release: entry (name = '/ashworth/vessels_bts/1048885')
09:21:11  BTS[32] bts_lock_release: exit  (status = 0)
09:21:11  BTS[32] bts_xact_process: exit  (status = 0)
09:21:11  BTS[32] bts_xact_end_stmt: (new stmt: 2)
09:21:11  BTS[32] bts_fini: entry (errcode = 0)
09:21:11  BTS[32] bts_cl_fini: entry (bts_cl_init_value = 1)
09:21:11  BTS[32] bts_cl_init_clear: entry 
09:21:11  BTS[32] bts_cl_init_clear: exit  (status = 0)
09:21:11  BTS[32] bts_cl_fini: exit  (bts_cl_init_value = 0, status = 0)
09:21:11  BTS[32] bts_lock_release: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: exit  (lock name: 'BTS_LOCK-EVP', status = 0)
09:21:11  BTS[32] bts_lock_release: exit  (status = 0)
09:21:11  BTS[32] bts_fini: exit  (status = 0)
09:21:11  BTS[32] bts_xact_end_stmt: exit  (status = 0, state = 0)
09:21:11  BTS[32] bts_am_endscan: entry 
09:21:11  BTS[32] bts_init: entry 
09:21:11  BTS[32] bts_lock_try: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: exit  (lock name: 'BTS_LOCK-EVP', status = 0)
09:21:11  BTS[32] bts_lock_try: exit  (status = 0)
09:21:11  BTS[32] bts_cl_init: entry (bts_cl_init_value = 0)
09:21:11  BTS[32] bts_cl_init_restore: entry 
09:21:11  BTS[32] bts_cl_init_restore: exit  (status = 0)
09:21:11  BTS[32] bts_cl_init: exit  (bts_cl_init_value = 1, status = 0)
09:21:11  BTS[32] bts_gls_init: entry 
09:21:11  BTS[32] bts_gls_init: exit  (status = 0)
09:21:11  BTS[32] bts_evp_check: entry 
09:21:11  BTS[32] bts_evp_check: exit  (status = 0)
09:21:11  BTS[32] bts_auto_trace: (skipped)
09:21:11  BTS[32] bts_init: exit  (status = 0)
09:21:11  BTS[32] bts_lock_try: entry (name = '/ashworth/vessels_bts/1048885')
09:21:11  BTS[32] bts_lock_try: exit  (status = 0)
09:21:11  BTS[32] bts_cl_query_end: entry 
09:21:11  BTS[32] bts_cl_query_parse: entry 
09:21:11  BTS[32] bts_cl_query_parse: exit  (status = 0)
09:21:11  BTS[32] bts_cl_query_end: exit  (status = 0)
09:21:11  BTS[32] bts_lock_release: entry (name = '/ashworth/vessels_bts/1048885')
09:21:11  BTS[32] bts_lock_release: exit  (status = 0)
09:21:11  BTS[32] bts_fini: entry (errcode = 0)
09:21:11  BTS[32] bts_cl_fini: entry (bts_cl_init_value = 1)
09:21:11  BTS[32] bts_cl_init_clear: entry 
09:21:11  BTS[32] bts_cl_init_clear: exit  (status = 0)
09:21:11  BTS[32] bts_cl_fini: exit  (bts_cl_init_value = 0, status = 0)
09:21:11  BTS[32] bts_lock_release: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: exit  (lock name: 'BTS_LOCK-EVP', status = 0)
09:21:11  BTS[32] bts_lock_release: exit  (status = 0)
09:21:11  BTS[32] bts_fini: exit  (status = 0)
09:21:11  BTS[32] bts_am_endscan: exit  (status = 0)
09:21:11  BTS[32] bts_am_close: entry 
09:21:11  BTS[32] bts_init: entry 
09:21:11  BTS[32] bts_lock_try: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: exit  (lock name: 'BTS_LOCK-EVP', status = 0)
09:21:11  BTS[32] bts_lock_try: exit  (status = 0)
09:21:11  BTS[32] bts_cl_init: entry (bts_cl_init_value = 0)
09:21:11  BTS[32] bts_cl_init_restore: entry 
09:21:11  BTS[32] bts_cl_init_restore: exit  (status = 0)
09:21:11  BTS[32] bts_cl_init: exit  (bts_cl_init_value = 1, status = 0)
09:21:11  BTS[32] bts_gls_init: entry 
09:21:11  BTS[32] bts_gls_init: exit  (status = 0)
09:21:11  BTS[32] bts_evp_check: entry 
09:21:11  BTS[32] bts_evp_check: exit  (status = 0)
09:21:11  BTS[32] bts_auto_trace: (skipped)
09:21:11  BTS[32] bts_init: exit  (status = 0)
09:21:11  BTS[32] bts_am_spacename: entry 
09:21:11  BTS[32] bts_am_spacename: exit  (spacename = 'bts_sbspace1', status = 0)
09:21:11  BTS[32] bts_am_userdata: (target = '/ashworth/vessels_bts/1048885')
09:21:11  BTS[32] bts_am_userdata_free: entry 
09:21:11  BTS[32] bts_fini: entry (errcode = 0)
09:21:11  BTS[32] bts_cl_fini: entry (bts_cl_init_value = 1)
09:21:11  BTS[32] bts_cl_init_clear: entry 
09:21:11  BTS[32] bts_cl_init_clear: exit  (status = 0)
09:21:11  BTS[32] bts_cl_fini: exit  (bts_cl_init_value = 0, status = 0)
09:21:11  BTS[32] bts_lock_release: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: entry (name = 'EVP')
09:21:11  BTS[32] bts_lock_name: exit  (lock name: 'BTS_LOCK-EVP', status = 0)
09:21:11  BTS[32] bts_lock_release: exit  (status = 0)
09:21:11  BTS[32] bts_fini: exit  (status = 0)
09:21:11  BTS[32] bts_am_close: exit  (status = 0)
09:21:11  BTS[32] bts_xact_end_xact: entry 
09:21:11  BTS[32] bts_xact_bxh_init: entry 
09:21:11  BTS[32] bts_xact_bxh_init: (XACT: named_memory(BTS_XACT_20))
09:21:11  BTS[32] bts_xact_bxh_init: (XACT: mi_named_get(BTS_XACT_20) failed: 2)
09:21:11  BTS[32] bts_xact_bxh_init: (XACT: mi_named_get(BTS_XACT_20) failure ignored)
09:21:11  BTS[32] bts_xact_bxh_init: exit  (status = 0, bxh = 0x00000000)
09:21:11  BTS[32] bts_xact_end_xact: exit  (status = 0, state = -1)
09:21:11  FSE Entry bts_inFseXactCallback end_xact
09:21:11  FSE Exit  bts_inFseXactCallback end_xact
09:21:11  BTS[32] bts_xact_post_xact: entry 
09:21:11  BTS[32] bts_xact_bxh_init: entry 
09:21:11  BTS[32] bts_xact_bxh_init: (XACT: named_memory(BTS_XACT_20))
09:21:11  BTS[32] bts_xact_bxh_init: (XACT: mi_named_get(BTS_XACT_20) failed: 2)
09:21:11  BTS[32] bts_xact_bxh_init: (XACT: mi_named_get(BTS_XACT_20) failure ignored)
09:21:11  BTS[32] bts_xact_bxh_init: exit  (status = 0, bxh = 0x00000000)
09:21:11  BTS[32] bts_xact_post_xact: exit  (status = 0, state = -1)
09:21:11  FSE Entry bts_inFseXactCallback post_xact
09:21:11  FSE Exit  bts_inFseXactCallback post_xact
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