[FEAT MERGE] implement of log disk writing throttling

2023-05-02 01:45:12 +00:00
parent 3ae36f5774
commit 8094743d24
57 changed files with 3492 additions and 216 deletions
--- a/unittest/logservice/test_palf_throttling.cpp
+++ b/unittest/logservice/test_palf_throttling.cpp
@ -0,0 +1,428 @@
+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#include <gtest/gtest.h>
+#include <random>
+#include <string>
+#include <pthread.h>
+
+#define private public
+#include "logservice/palf/palf_env_impl.h"
+#include "logservice/palf/log_io_worker.h"
+#undef private
+#include "share/rc/ob_tenant_base.h"
+
+namespace oceanbase
+{
+using namespace common;
+using namespace share;
+using namespace palf;
+
+namespace unittest
+{
+
+class TestPalfThrottling : public ::testing::Test
+{
+public:
+  TestPalfThrottling();
+  virtual ~TestPalfThrottling();
+  virtual void SetUp();
+  virtual void TearDown();
+protected:
+};
+
+TestPalfThrottling::TestPalfThrottling()  {}
+
+TestPalfThrottling::~TestPalfThrottling()
+{
+}
+
+void TestPalfThrottling::SetUp()
+{
+  //ObMallocAllocator::get_instance()->create_and_add_tenant_allocator(1001);
+  // init MTL
+  //ObTenantBase tbase(1001);
+  //ObTenantEnv::set_tenant(&tbase);
+}
+
+void TestPalfThrottling::TearDown()
+{
+  PALF_LOG(INFO, "TestPalfThrottling has TearDown");
+  //ObMallocAllocator::get_instance()->recycle_tenant_allocator(1001);
+}
+
+TEST(TestPalfThrottling, test_palf_options)
+{
+  char buf[64]  = {0};
+  memset(buf, 0, 64);
+  int64_t checksum = common::ob_crc64(buf, 64);
+  PALF_LOG(INFO, "checksum", K(checksum));
+  //test PalfDiskOptionsWrapper
+  PalfDiskOptionsWrapper wrapper;
+  ASSERT_EQ(false, wrapper.need_throttling());
+  int64_t total_disk_size = 1024 * 1024 * 1024L;
+  int64_t utilization_limit_threshold = 95;
+  int64_t throttling_percentage = 60;
+  wrapper.disk_opts_for_stopping_writing_.log_disk_throttling_percentage_ = throttling_percentage;
+  wrapper.disk_opts_for_stopping_writing_.log_disk_usage_limit_size_ = total_disk_size;
+  wrapper.disk_opts_for_stopping_writing_.log_disk_utilization_threshold_ = 80;
+  wrapper.disk_opts_for_stopping_writing_.log_disk_utilization_limit_threshold_ = utilization_limit_threshold;
+  int64_t unrecyclable_size = 0;
+  wrapper.set_cur_unrecyclable_log_disk_size(unrecyclable_size);
+  ASSERT_EQ(false, wrapper.need_throttling());
+  unrecyclable_size = total_disk_size * 70 /100;
+  wrapper.set_cur_unrecyclable_log_disk_size(unrecyclable_size);
+  ASSERT_EQ(true, wrapper.need_throttling());
+  //test PalfThrottleOptions
+  PalfThrottleOptions throttling_options;
+  ASSERT_EQ(false, throttling_options.is_valid());
+  ASSERT_EQ(false, throttling_options.need_throttling());
+  ASSERT_EQ(0, throttling_options.get_available_size_after_limit());
+  wrapper.get_throttling_options(throttling_options);
+  ASSERT_EQ(true, throttling_options.is_valid());
+  ASSERT_EQ(throttling_options.total_disk_space_, total_disk_size);
+  ASSERT_EQ(throttling_options.stopping_writing_percentage_, utilization_limit_threshold);
+  ASSERT_EQ(throttling_options.trigger_percentage_, throttling_percentage);
+  ASSERT_EQ(throttling_options.unrecyclable_disk_space_, unrecyclable_size);
+  ASSERT_EQ(true, throttling_options.need_throttling());
+  ASSERT_EQ(total_disk_size * (utilization_limit_threshold - throttling_percentage)/100, throttling_options.get_available_size_after_limit());
+}
+
+TEST(TestPalfThrottling, test_throttling_stat)
+{
+  LogThrottlingStat stat;
+  ASSERT_EQ(false, stat.has_ever_throttled());
+  stat.start_throttling();
+  ASSERT_EQ(true, stat.has_ever_throttled());
+  stat.after_throttling(0, 1024);
+  stat.after_throttling(100, 1024);
+  stat.after_throttling(200, 1024);
+  stat.after_throttling(0, 1024);
+  stat.stop_throttling();
+  ASSERT_EQ(true, OB_INVALID_TIMESTAMP != stat.start_ts_);
+  ASSERT_EQ(true, OB_INVALID_TIMESTAMP != stat.stop_ts_);
+  ASSERT_EQ(2048, stat.total_skipped_size_);
+  ASSERT_EQ(2, stat.total_skipped_task_cnt_);
+  ASSERT_EQ(2048, stat.total_throttling_size_);
+  ASSERT_EQ(2, stat.total_throttling_task_cnt_);
+  ASSERT_EQ(300, stat.total_throttling_interval_);
+  ASSERT_EQ(200, stat.max_throttling_interval_);
+  stat.start_throttling();
+  ASSERT_EQ(0, stat.total_skipped_size_);
+  ASSERT_EQ(0, stat.total_skipped_task_cnt_);
+  ASSERT_EQ(0, stat.total_throttling_size_);
+  ASSERT_EQ(0, stat.total_throttling_task_cnt_);
+  ASSERT_EQ(0, stat.total_throttling_interval_);
+  ASSERT_EQ(0, stat.max_throttling_interval_);
+}
+
+TEST(TestPalfThrottling, test_log_write_throttle)
+{
+  int64_t total_disk_size = 1024 * 1024 * 1024L;
+  int64_t utilization_limit_threshold = 95;
+  int64_t throttling_percentage = 60;
+  PalfEnvImpl palf_env_impl;
+  palf_env_impl.is_inited_ = true;
+  palf_env_impl.disk_options_wrapper_.disk_opts_for_stopping_writing_.log_disk_throttling_percentage_ = throttling_percentage;
+  palf_env_impl.disk_options_wrapper_.disk_opts_for_stopping_writing_.log_disk_usage_limit_size_ = total_disk_size;
+  palf_env_impl.disk_options_wrapper_.disk_opts_for_stopping_writing_.log_disk_utilization_threshold_ = 80;
+  palf_env_impl.disk_options_wrapper_.disk_opts_for_stopping_writing_.log_disk_utilization_limit_threshold_ = utilization_limit_threshold;
+  int64_t unrecyclable_size = 0;
+  palf_env_impl.disk_options_wrapper_.set_cur_unrecyclable_log_disk_size(unrecyclable_size);
+  PalfThrottleOptions throttle_options;
+  palf_env_impl.disk_options_wrapper_.get_throttling_options(throttle_options);
+
+  LogWritingThrottle throttle;
+  ASSERT_EQ(false, throttle.need_throttling_());
+  ASSERT_EQ(false, throttle.need_writing_throttling_notified());
+  throttle.notify_need_writing_throttling(true);
+  ASSERT_EQ(true, throttle.need_writing_throttling_notified());
+
+  throttle.notify_need_writing_throttling(false);
+  ASSERT_EQ(false, throttle.need_writing_throttling_notified());
+
+  ASSERT_EQ(OB_INVALID_ARGUMENT, throttle.after_append_log(-1, 0));
+  ASSERT_EQ(OB_INVALID_ARGUMENT, throttle.after_append_log(0, -1));
+
+  //test throttling only after notified
+  PALF_LOG(INFO, "case 1: test no need throttling while notify_need_writing_throttling is false");
+  throttle.update_throttling_options(&palf_env_impl);
+  throttle.throttling(1024, &palf_env_impl);
+  PalfThrottleOptions invalid_throttle_options;
+  ASSERT_EQ(invalid_throttle_options, throttle.throttling_options_);
+  ASSERT_EQ(true, OB_INVALID_TIMESTAMP != throttle.last_update_ts_);
+  ASSERT_EQ(false, throttle.need_writing_throttling_notified_);
+
+  // test update interval 500ms
+  PALF_LOG(INFO, "case 2: test update interval");
+  throttle.throttling(1024, &palf_env_impl);
+  ASSERT_EQ(invalid_throttle_options, throttle.throttling_options_);
+  ASSERT_EQ(true, OB_INVALID_TIMESTAMP != throttle.last_update_ts_);
+  ASSERT_EQ(false, throttle.need_writing_throttling_notified_);
+
+  //test no need throttling after update
+  PALF_LOG(INFO, "case 3: test no need throttling while unrecyclable_log_disk_size is no more than trigger_size");
+  usleep(LogWritingThrottle::UPDATE_INTERVAL_US);
+  throttle.update_throttling_options(&palf_env_impl);
+  throttle.notify_need_writing_throttling(true);
+  throttle.throttling(1024, &palf_env_impl);
+  ASSERT_EQ(false, throttle.need_throttling_());
+  ASSERT_EQ(false, throttle.stat_.has_ever_throttled());
+
+
+  PALF_LOG(INFO, "case 4: test no need throttling while trigger percentage is 100", K(throttle));
+  unrecyclable_size = total_disk_size * 70 / 100;
+  palf_env_impl.disk_options_wrapper_.set_cur_unrecyclable_log_disk_size(unrecyclable_size);
+  palf_env_impl.disk_options_wrapper_.disk_opts_for_stopping_writing_.log_disk_throttling_percentage_ = 100;
+  usleep(LogWritingThrottle::UPDATE_INTERVAL_US);
+  throttle.update_throttling_options(&palf_env_impl);
+  throttle.throttling(1024, &palf_env_impl);
+  palf_env_impl.disk_options_wrapper_.get_throttling_options(throttle_options);
+  ASSERT_EQ(false, throttle.need_throttling_());
+  ASSERT_EQ(false, throttle.stat_.has_ever_throttled());
+
+  //test need throttling after update
+  PALF_LOG(INFO, "case 4: test need throttling", K(throttle));
+  palf_env_impl.disk_options_wrapper_.disk_opts_for_stopping_writing_.log_disk_throttling_percentage_ = throttling_percentage;
+  unrecyclable_size = total_disk_size * 70 / 100;
+  palf_env_impl.disk_options_wrapper_.set_cur_unrecyclable_log_disk_size(unrecyclable_size);
+  usleep(LogWritingThrottle::UPDATE_INTERVAL_US);
+  throttle.update_throttling_options(&palf_env_impl);
+  throttle.throttling(1024, &palf_env_impl);
+  palf_env_impl.disk_options_wrapper_.get_throttling_options(throttle_options);
+  ASSERT_EQ(throttle_options, throttle.throttling_options_);
+  ASSERT_EQ(true, throttle.need_throttling_());
+  ASSERT_EQ(true, throttle.stat_.has_ever_throttled());
+  ASSERT_EQ(1024, throttle.stat_.total_throttling_size_);
+  ASSERT_EQ(1, throttle.stat_.total_throttling_task_cnt_);
+  ASSERT_EQ(0, throttle.stat_.total_skipped_task_cnt_);
+  ASSERT_EQ(0, throttle.stat_.total_skipped_size_);
+  throttle.after_append_log(1024, 0);
+  ASSERT_EQ(1024, throttle.appended_log_size_cur_round_);
+  ASSERT_EQ(0, throttle.submitted_seq_);
+  ASSERT_EQ(0, throttle.handled_seq_);
+
+  //test no need throttling with flush meta task in queue
+  //.1 flush log task
+  PALF_LOG(INFO, "case 5: test no need throttling while flush meta task ", K(throttle));
+  throttle.inc_and_fetch_submitted_seq();
+  throttle.inc_and_fetch_submitted_seq();
+  throttle.inc_and_fetch_submitted_seq();
+  ASSERT_EQ(3, throttle.submitted_seq_);
+  throttle.throttling(1024, &palf_env_impl);
+  ASSERT_EQ(throttle_options, throttle.throttling_options_);
+  ASSERT_EQ(false, throttle.need_throttling_());
+  ASSERT_EQ(1024, throttle.stat_.total_throttling_size_);
+  ASSERT_EQ(1, throttle.stat_.total_throttling_task_cnt_);
+  ASSERT_EQ(1, throttle.stat_.total_skipped_task_cnt_);
+  ASSERT_EQ(1024, throttle.stat_.total_skipped_size_);
+  throttle.after_append_log(1024, 0);
+  ASSERT_EQ(2048, throttle.appended_log_size_cur_round_);
+  ASSERT_EQ(3, throttle.submitted_seq_);
+  ASSERT_EQ(0, throttle.handled_seq_);
+
+//.2 flush meta task
+  PALF_LOG(INFO, "case 6: test no need throttling and flush meta task ", K(throttle));
+  throttle.throttling(1024, &palf_env_impl);
+  ASSERT_EQ(throttle_options, throttle.throttling_options_);
+  ASSERT_EQ(true, throttle.need_throttling_with_options_());
+  ASSERT_EQ(false, throttle.need_throttling_());
+  ASSERT_EQ(1024, throttle.stat_.total_throttling_size_);
+  ASSERT_EQ(1, throttle.stat_.total_throttling_task_cnt_);
+  ASSERT_EQ(2, throttle.stat_.total_skipped_task_cnt_);
+  ASSERT_EQ(2048, throttle.stat_.total_skipped_size_);
+  throttle.after_append_log(1024, 1);
+  ASSERT_EQ(3072, throttle.appended_log_size_cur_round_);
+  ASSERT_EQ(3, throttle.submitted_seq_);
+  ASSERT_EQ(1, throttle.handled_seq_);
+
+  throttle.throttling(1024, &palf_env_impl);
+  ASSERT_EQ(throttle_options, throttle.throttling_options_);
+  ASSERT_EQ(true, throttle.need_throttling_with_options_());
+  ASSERT_EQ(false, throttle.need_throttling_());
+  ASSERT_EQ(1024, throttle.stat_.total_throttling_size_);
+  ASSERT_EQ(1, throttle.stat_.total_throttling_task_cnt_);
+  ASSERT_EQ(3, throttle.stat_.total_skipped_task_cnt_);
+  ASSERT_EQ(3072, throttle.stat_.total_skipped_size_);
+  throttle.after_append_log(1024, 3);
+  ASSERT_EQ(4096, throttle.appended_log_size_cur_round_);
+  ASSERT_EQ(3, throttle.submitted_seq_);
+  ASSERT_EQ(3, throttle.handled_seq_);
+
+  PALF_LOG(INFO, "case 7: need throttling after all flush meta task handled", K(throttle));
+  throttle.throttling(1024, &palf_env_impl);
+  ASSERT_EQ(throttle_options, throttle.throttling_options_);
+  ASSERT_EQ(true, throttle.decay_factor_ > 0.0);
+  ASSERT_EQ(true, throttle.need_throttling_());
+  ASSERT_EQ(2048, throttle.stat_.total_throttling_size_);
+  ASSERT_EQ(2, throttle.stat_.total_throttling_task_cnt_);
+  ASSERT_EQ(3, throttle.stat_.total_skipped_task_cnt_);
+  ASSERT_EQ(3072, throttle.stat_.total_skipped_size_);
+  throttle.after_append_log(1024, 3);
+  ASSERT_EQ(5120, throttle.appended_log_size_cur_round_);
+  ASSERT_EQ(3, throttle.submitted_seq_);
+  ASSERT_EQ(3, throttle.handled_seq_);
+
+  //test  notify_need_writing_throttling(false) changed
+  PALF_LOG(INFO, "case 8: no need to throttle after notify_need_throttling(false)", K(throttle));
+  usleep(LogWritingThrottle::UPDATE_INTERVAL_US);
+  throttle.notify_need_writing_throttling(false);
+  throttle.update_throttling_options(&palf_env_impl);
+  throttle.throttling(1024, &palf_env_impl);
+  ASSERT_EQ(invalid_throttle_options, throttle.throttling_options_);
+  ASSERT_EQ(false, throttle.need_throttling_with_options_());
+  ASSERT_EQ(false, throttle.need_throttling_());
+  ASSERT_EQ(2048, throttle.stat_.total_throttling_size_);
+  ASSERT_EQ(2, throttle.stat_.total_throttling_task_cnt_);
+  ASSERT_EQ(3, throttle.stat_.total_skipped_task_cnt_);
+  ASSERT_EQ(3072, throttle.stat_.total_skipped_size_);
+  ASSERT_EQ(true, OB_INVALID_TIMESTAMP != throttle.stat_.stop_ts_);
+  throttle.after_append_log(1024, 0);
+  ASSERT_EQ(1024, throttle.appended_log_size_cur_round_);
+  ASSERT_EQ(0, throttle.decay_factor_);
+  ASSERT_EQ(3, throttle.submitted_seq_);
+  ASSERT_EQ(3, throttle.handled_seq_);
+
+  //test need write throttling again
+  PALF_LOG(INFO, "case 9: need to throttle after notify_need_throttling(true)", K(throttle));
+  usleep(LogWritingThrottle::UPDATE_INTERVAL_US);
+  throttle.notify_need_writing_throttling(true);
+  throttle.update_throttling_options(&palf_env_impl);
+  throttle.throttling(1024, &palf_env_impl);
+  ASSERT_EQ(true, throttle.need_throttling_with_options_());
+  ASSERT_EQ(true, throttle.need_throttling_());
+  ASSERT_EQ(throttle_options, throttle.throttling_options_);
+  ASSERT_EQ(true, throttle.decay_factor_ > 0.0);
+  ASSERT_EQ(1024, throttle.stat_.total_throttling_size_);
+  ASSERT_EQ(1, throttle.stat_.total_throttling_task_cnt_);
+  ASSERT_EQ(0, throttle.stat_.total_skipped_task_cnt_);
+  ASSERT_EQ(0, throttle.stat_.total_skipped_size_);
+  ASSERT_EQ(true, throttle.stat_.total_throttling_interval_ > 0);
+  ASSERT_EQ(true, OB_INVALID_TIMESTAMP == throttle.stat_.stop_ts_);
+  throttle.after_append_log(1024, 0);
+  ASSERT_EQ(1024, throttle.appended_log_size_cur_round_);
+  ASSERT_EQ(3, throttle.submitted_seq_);
+  ASSERT_EQ(3, throttle.handled_seq_);
+
+  double old_decay_factor = throttle.decay_factor_;
+  //
+  PALF_LOG(INFO, "case 10: test recalculate decay_factor", K(throttle));
+  usleep(LogWritingThrottle::UPDATE_INTERVAL_US);
+  palf_env_impl.disk_options_wrapper_.disk_opts_for_stopping_writing_.log_disk_throttling_percentage_ = 55;
+  palf_env_impl.get_throttling_options(throttle_options);
+  throttle.update_throttling_options(&palf_env_impl);
+  throttle.throttling(1024, &palf_env_impl);
+  ASSERT_EQ(true, throttle.need_throttling_with_options_());
+  ASSERT_EQ(true, throttle.need_throttling_());
+  ASSERT_EQ(throttle_options, throttle.throttling_options_);
+  ASSERT_EQ(true, throttle.decay_factor_ > 0.0);
+  ASSERT_EQ(true, throttle.decay_factor_ != old_decay_factor);
+  ASSERT_EQ(2048, throttle.stat_.total_throttling_size_);
+  ASSERT_EQ(2, throttle.stat_.total_throttling_task_cnt_);
+  ASSERT_EQ(0, throttle.stat_.total_skipped_task_cnt_);
+  ASSERT_EQ(0, throttle.stat_.total_skipped_size_);
+  ASSERT_EQ(true, OB_INVALID_TIMESTAMP == throttle.stat_.stop_ts_);
+  throttle.after_append_log(1024, 0);
+  ASSERT_EQ(2048, throttle.appended_log_size_cur_round_);
+  ASSERT_EQ(3, throttle.submitted_seq_);
+  ASSERT_EQ(3, throttle.handled_seq_);
+
+  //test reset appended_log_size_cur_round_
+  PALF_LOG(INFO, "case 11: test reset appended_log_size_cur_round_ after unrecyclable_size changes", K(throttle));
+  old_decay_factor = throttle.decay_factor_;
+  usleep(LogWritingThrottle::UPDATE_INTERVAL_US);
+  unrecyclable_size = total_disk_size * 65/100;
+  palf_env_impl.disk_options_wrapper_.set_cur_unrecyclable_log_disk_size(unrecyclable_size);
+  throttle.update_throttling_options(&palf_env_impl);
+  throttle.throttling(1024, &palf_env_impl);
+  ASSERT_EQ(true, throttle.need_throttling_with_options_());
+  ASSERT_EQ(true, throttle.need_throttling_());
+  palf_env_impl.get_throttling_options(throttle_options);
+  ASSERT_EQ(throttle_options, throttle.throttling_options_);
+  ASSERT_EQ(true, throttle.decay_factor_ > 0.0);
+  ASSERT_EQ(true, throttle.decay_factor_ == old_decay_factor);
+  ASSERT_EQ(3072, throttle.stat_.total_throttling_size_);
+  ASSERT_EQ(3, throttle.stat_.total_throttling_task_cnt_);
+  ASSERT_EQ(0, throttle.stat_.total_skipped_task_cnt_);
+  ASSERT_EQ(0, throttle.stat_.total_skipped_size_);
+  ASSERT_EQ(true, OB_INVALID_TIMESTAMP != throttle.stat_.start_ts_);
+  ASSERT_EQ(true, OB_INVALID_TIMESTAMP == throttle.stat_.stop_ts_);
+  throttle.after_append_log(1024, 0);
+  ASSERT_EQ(1024, throttle.appended_log_size_cur_round_);
+  ASSERT_EQ(3, throttle.submitted_seq_);
+  ASSERT_EQ(3, throttle.handled_seq_);
+  ASSERT_EQ(OB_ERR_UNEXPECTED, throttle.after_append_log(0, 4));
+  ASSERT_EQ(OB_ERR_UNEXPECTED, throttle.after_append_log(0, 2));
+
+//test stop write throttling when trigger percentage changed
+  PALF_LOG(INFO, "case 12: test stop write throttling when trigger percentage changed", K(throttle));
+  usleep(LogWritingThrottle::UPDATE_INTERVAL_US);
+  palf_env_impl.disk_options_wrapper_.disk_opts_for_stopping_writing_.log_disk_throttling_percentage_ = 80;
+  palf_env_impl.get_throttling_options(throttle_options);
+  throttle.update_throttling_options(&palf_env_impl);
+  throttle.throttling(1024, &palf_env_impl);
+  ASSERT_EQ(false, throttle.need_throttling_with_options_());
+  ASSERT_EQ(false, throttle.need_throttling_());
+  ASSERT_EQ(invalid_throttle_options, throttle.throttling_options_);
+  ASSERT_EQ(0, throttle.decay_factor_);
+  ASSERT_EQ(3072, throttle.stat_.total_throttling_size_);
+  ASSERT_EQ(3, throttle.stat_.total_throttling_task_cnt_);
+  ASSERT_EQ(0, throttle.stat_.total_skipped_task_cnt_);
+  ASSERT_EQ(0, throttle.stat_.total_skipped_size_);
+  ASSERT_EQ(true, OB_INVALID_TIMESTAMP != throttle.stat_.stop_ts_);
+  ASSERT_EQ(0, throttle.appended_log_size_cur_round_);
+  ASSERT_EQ(3, throttle.submitted_seq_);
+  ASSERT_EQ(3, throttle.handled_seq_);
+
+  PALF_LOG(INFO, "case 12: test stop writing throttling when unrecyclable size fallbacks", K(throttle));
+  usleep(LogWritingThrottle::UPDATE_INTERVAL_US);
+  palf_env_impl.disk_options_wrapper_.disk_opts_for_stopping_writing_.log_disk_throttling_percentage_ = 60;
+  throttle.notify_need_writing_throttling(true);
+  throttle.update_throttling_options(&palf_env_impl);
+  throttle.throttling(1024, &palf_env_impl);
+  ASSERT_EQ(true, throttle.need_throttling_with_options_());
+  ASSERT_EQ(true, throttle.need_throttling_());
+  palf_env_impl.get_throttling_options(throttle_options);
+  ASSERT_EQ(throttle_options, throttle.throttling_options_);
+  ASSERT_EQ(true, throttle.decay_factor_ > 0.0);
+  ASSERT_EQ(1024, throttle.stat_.total_throttling_size_);
+  ASSERT_EQ(1, throttle.stat_.total_throttling_task_cnt_);
+  ASSERT_EQ(0, throttle.stat_.total_skipped_task_cnt_);
+  ASSERT_EQ(0, throttle.stat_.total_skipped_size_);
+  ASSERT_EQ(true, throttle.stat_.total_throttling_interval_ > 0);
+  ASSERT_EQ(true, OB_INVALID_TIMESTAMP == throttle.stat_.stop_ts_);
+  throttle.after_append_log(1024, 0);
+  ASSERT_EQ(1024, throttle.appended_log_size_cur_round_);
+  ASSERT_EQ(3, throttle.submitted_seq_);
+  ASSERT_EQ(3, throttle.handled_seq_);
+
+  usleep(LogWritingThrottle::UPDATE_INTERVAL_US);
+  unrecyclable_size = total_disk_size * 45/100;
+  palf_env_impl.disk_options_wrapper_.set_cur_unrecyclable_log_disk_size(unrecyclable_size);
+  throttle.update_throttling_options(&palf_env_impl);
+  throttle.throttling(1024, &palf_env_impl);
+  ASSERT_EQ(false, throttle.need_throttling_with_options_());
+
+}
+
+} // END of unittest
+} // end of oceanbase
+
+int main(int argc, char **argv)
+{
+  system("rm -rf ./test_palf_throttling.log*");
+  OB_LOGGER.set_file_name("test_palf_throttling.log", true);
+  OB_LOGGER.set_log_level("INFO");
+  PALF_LOG(INFO, "begin unittest::test_palf_throttling");
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}