Il database sembra inspiegabilmente grande

La dimensione della nostra tabella post-timings di Discourse è di circa 17 GB. È normale?

table_name                           | row_estimate | table_size | index_size | total_size
--------------------------------------|--------------------|----------------|-------------|----------
post_timings                         | 120967448    | 6676 MB    | 10 GB      | 17 GB
posts                                | 3616224      | 2413 MB    | 3219 MB    | 5632 MB
user_actions                         | 15159571     | 1215 MB    | 3699 MB    | 4914 MB
post_search_data                     | 3531969      | 3756 MB    | 1031 MB    | 4787 MB
notifications                        | 2241273      | 687 MB     | 824 MB     | 1510 MB
topic_views                          | 7696258      | 369 MB     | 1110 MB    | 1478 MB
post_actions                         | 3475097      | 350 MB     | 618 MB     | 968 MB
topic_users                          | 3343623      | 365 MB     | 257 MB     | 622 MB
user_auth_token_logs                 | 1123545      | 410 MB     | 110 MB     | 520 MB
post_stats                           | 2779471      | 354 MB     | 155 MB     | 509 MB
incoming_links                       | 3154654      | 219 MB     | 251 MB     | 469 MB
topics                               | 64301        | 142 MB     | 286 MB     | 429 MB
post_replies                         | 2327812      | 220 MB     | 120 MB     | 340 MB
user_visits                          | 289994       | 17 MB      | 229 MB     | 246 MB
stylesheet_cache                     | 4605         | 204 MB     | 840 kB     | 205 MB
top_topics                           | 40202        | 19 MB      | 148 MB     | 167 MB
user_profile_views                   | 593591       | 61 MB      | 97 MB      | 158 MB
post_revisions                       | 102832       | 87 MB      | 8072 kB    | 95 MB