Mercurial > dovecot > original-hg > dovecot-1.2
changeset 7569:ea913434d522 HEAD
Sort index optimization: Don't write changes to sort IDs if we're doing it
only to give sort ID space to expunged messages.
| author | Timo Sirainen <tss@iki.fi> |
|---|---|
| date | Thu, 29 May 2008 18:49:55 +0300 |
| parents | 66e6b61680a5 |
| children | 2220b2aa9f7c |
| files | src/lib-storage/index/index-sort-string.c |
| diffstat | 1 files changed, 15 insertions(+), 0 deletions(-) [+] |
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--- a/src/lib-storage/index/index-sort-string.c Thu May 29 18:47:46 2008 +0300 +++ b/src/lib-storage/index/index-sort-string.c Thu May 29 18:49:55 2008 +0300 @@ -34,6 +34,7 @@ unsigned int first_missing_sort_id_idx; uint32_t ext_id, last_seq, highest_reset_id; + uint32_t lowest_nonexpunged_zero; unsigned int regetting:1; unsigned int have_all_wanted:1; @@ -157,6 +158,14 @@ node->sort_id = 0; } else { node->sort_id = data == NULL ? 0 : *(const uint32_t *)data; + if (node->sort_id == 0) { + if (ctx->lowest_nonexpunged_zero > node->seq || + ctx->lowest_nonexpunged_zero == 0) + ctx->lowest_nonexpunged_zero = node->seq; + } else { + i_assert(ctx->lowest_nonexpunged_zero == 0 || + ctx->lowest_nonexpunged_zero > node->seq); + } } if (node->sort_id != 0) { @@ -669,6 +678,12 @@ next_seq = seqs[i] + 1; } } + + if (ctx->lowest_nonexpunged_zero == 0) { + /* we're handling only expunged zeros. if it causes us to + renumber some existing sort IDs, don't save them. */ + ctx->no_writing = TRUE; + } } void index_sort_list_finish_string(struct mail_search_sort_program *program)