diff --git a/defaults/main.yml b/defaults/main.yml
index c96b858..351dc7a 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -98,6 +98,10 @@ trove_galera_use_ssl: "{{ galera_use_ssl | default(False) }}"
 trove_galera_ssl_ca_cert: "{{ galera_ssl_ca_cert | default('') }}"
 trove_galera_port: "{{ galera_port | default('3306') }}"
 trove_galera_connection_string: "mysql+pymysql://{{ trove_galera_user}}:{{ trove_galera_password }}@{{ trove_galera_address }}:{{ trove_galera_port }}/{{ trove_galera_database_name }}?charset=utf8{% if trove_galera_use_ssl | bool %}&ssl_verify_cert=true{% if trove_galera_ssl_ca_cert | length> 0 %}&ssl_ca={{ trove_galera_ssl_ca_cert }}{% endif %}{% endif %}"
+trove_db_max_overflow: "{{ openstack_db_max_overflow | default('50') }}"
+trove_db_max_pool_size: "{{ openstack_db_max_pool_size | default('5') }}"
+trove_db_pool_timeout: "{{ openstack_db_pool_timeout | default('30') }}"
+trove_db_connection_recycle_time: "{{ openstack_db_connection_recycle_time | default('600') }}"
 
 ## Oslo Messaging vars
 # RPC
diff --git a/templates/trove.conf.j2 b/templates/trove.conf.j2
index 0c1379f..6ca48f1 100644
--- a/templates/trove.conf.j2
+++ b/templates/trove.conf.j2
@@ -105,7 +105,10 @@ user_domain_name = {{ trove_service_user_domain_name }}
 
 [database]
 connection = "{{ trove_galera_connection_string }}"
-idle_timeout = 3600
+max_overflow = {{ trove_db_max_overflow }}
+max_pool_size = {{ trove_db_max_pool_size }}
+pool_timeout = {{ trove_db_pool_timeout }}
+connection_recycle_time = {{ trove_db_connection_recycle_time }}
 
 [profiler]
 enabled = {{ trove_profiler_enabled }}
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://opendev.org/openstack/openstack-ansible-os_trove/commit/ebc07a44e739a4d52429f27c336f6b014d3cb685.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://opendev.org/openstack/openstack-ansible-os_trove/commit/ebc07a44e739a4d52429f27c336f6b014d3cb685.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>