MELVYL CATALOG DATABASE TELNET STATISTICS
Time period: 12/09/00 through 12/15/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 782 2,530 3,312
Davis 1,831 320 2,151
Irvine 753 0 753
Los Angeles 122 645 767
Riverside 591 128 719
San Diego 467 257 724
San Francisco 347 0 347
Santa Barbara 412 260 672
Santa Cruz 365 206 571
LBL 0 116 116
LLL 0 76 76
Other - UC 26 213 239
CSL 0 113 113
CSU n/a 135 135
Other-Non-UC n/a 3,864 3,864
_______ ______ _____
5,696 8,863 14,559
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 253 1,048 6,310
2-4 a.m. 137 661 3,880
4-6 a.m. 164 632 6,179
6-8 a.m. 368 1,369 9,800
8-10 a.m. 1,698 5,017 33,740
10-12 a.m. 2,725 9,634 66,425
12-2 p.m. 2,654 9,483 64,340
2-4 p.m. 3,040 10,251 69,348
4-6 p.m. 2,055 6,996 45,890
6-8 p.m. 706 2,176 18,968
8-10 p.m. 418 1,108 8,288
10-12 p.m. 341 1,065 9,869
__________ __________ __________ _________________
Total: 14,559 49,440 343,037
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,159 8,173 10,332
Davis 5,339 1,215 6,554
Irvine 2,892 0 2,892
Los Angeles 386 1,631 2,017
Riverside 1,767 339 2,106
San Diego 1,612 560 2,172
San Francisco 822 0 822
Santa Barbara 1,302 709 2,011
Santa Cruz 2,121 625 2,746
LBL 0 169 169
LLL 0 309 309
Other - UC 32 1,645 1,677
CSL 0 207 207
CSU n/a 365 365
Other-Non-UC n/a 15,061 15,061
_______ ______ _____
18,432 31,008 49,440
1.3 Records Displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 16,342 54,680 71,022
Davis 34,831 6,189 41,020
Irvine 18,877 0 18,877
Los Angeles 4,332 13,330 17,662
Riverside 11,478 3,657 15,135
San Diego 7,484 4,465 11,949
San Francisco 5,335 0 5,335
Santa Barbara 11,655 4,818 16,473
Santa Cruz 10,963 4,531 15,494
LBL 0 3,824 3,824
LLL 0 2,301 2,301
Other - UC 196 5,628 5,824
CSL 0 1,149 1,149
CSU n/a 4,652 4,652
Other-Non-UC n/a 112,320 112,320
_______ ______ _____
121,493 221,544 343,037
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.6
Standard deviation in seconds 3.6
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 COMMAND mode statistics:
____________________________
Median session length (minutes:seconds) 9:40
Average session length (minutes:seconds) 13:54
Longest session recorded (minutes:seconds) 883:54
Average number of searches completed per session 3.3
Retrievals per search - median 2.0
Retrievals per search - average 72.8
Retrievals per search - standard deviation 1362.3
Percent of searches completed with 0 results 29.3%
Percent of searches entered that are long 4.2%
Percent of long searches completed
(includes partial results) 64.2%
Commands entered, by type, excluding errors:
Total Percentage
FIND 47,669 36.1%
DISPLAY (excluding automatic displays) 42,156 31.9%
ACFIND 22 0.0%
BROWSE 208 0.2%
SELECT 200 0.2%
HELP 1,084 0.8%
EXPLAIN 1,035 0.8%
SET/RESET 3,464 2.6%
SHOW 471 0.4%
AT 2,578 2.0%
ADD ON (AND, OR, AND NOT) 1,732 1.3%
LOGON or LOGOFF 23,647 17.9%
COMMENT 27 0.0%
SAVE 968 0.7%
USE 1,083 0.8%
OTHER 5,837 4.4%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTH 7,400 14.8% 1,805 24.4% 12 83.8 354.0
AUTHOR 2,324 4.7% 536 23.1% 13 101.6 322.4
CORPORATE AUTH 517 1.0% 194 37.5% 22 1506.2 13406.9
EXACT CA 16 0.0% 2 12.5% 253 866.1 1542.1
TITLE WORD 11,493 23.0% 3,804 33.1% 5 40.7 258.7
EXACT TITLE 8,124 16.3% 3,119 38.4% 2 21.2 155.9
TITLE -> TW 1,260 2.5% 358 28.4% 10 63.7 242.2
TITLE -> XT 1,601 3.2% 823 51.4% 1 6.2 18.7
SUBJECT 2,998 6.0% 1,104 36.8% 44 410.2 1701.1
EXACT SUBJECT 143 0.3% 29 20.3% 52 754.0 2599.2
PERIODICAL 8,082 16.2% 1,585 19.6% 4 96.6 1474.2
EXACT PE 2,747 5.5% 386 14.1% 2 36.0 591.1
RPE 4 0.0% 3 75.0% 4 4.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
LANGUAGE 116 0.2% 8 6.9% 45 377.2 1917.6
DATE 651 1.3% 148 22.7% 6 107.1 564.6
FORM 730 1.5% 185 25.3% 13 94.1 322.6
NUMBER* 37 0.1% 12 32.4% 1 111.7 403.7
MUSIC* 9 0.0% 6 66.7% 32 28.0 24.2
SERIES 1,054 2.1% 295 28.0% 3 219.9 2999.7
UNIFORM TITLE 11 0.0% 3 27.3% 48 128.6 226.9
Other indexes 650 1.3% 287 44.2% 1 148.5 1760.5
* Number indexes include REPORT NUMBER STOCK NUMBER,
GOVERNMENT DOCUMENTS, and GPO ITEM NUMBER;
Music indexes include MUSICAL KEY, MUSIC PUBLISHER, and THEMATIC
By number of indexes:
Multiple 2,848 6.1% 807 28.3% 5 65.6 338.0
Single 44,097 93.9% 13,035 29.6% 5 106.3 1699.6
BROWSEs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. BROs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTH 6 3.2% 1 16.7% 4 4.8 3.1
CORPORATE AUTH 0 0.0% 0 0.0% 0 0.0 0.0
EXACT CA 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 162 85.3% 33 20.4% 39 100.1 126.7
EXACT SUBJECT 22 11.6% 2 9.1% 7 37.4 59.2
UNIFORM TITLE 0 0.0% 0 0.0% 0 0.0 0.0
SERIES 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 195 100% 36 18.5% 29 87.1 119.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 9.8%
BRIEF 67.2%
LONG 11.6%
MARC 3.8%
FIELDS 2.9%
TAG 2.3%
PERIODICALS 0.0%
COMMENTS 0.0%
Other (includes BROWSE, ACFIND) 2.4%
3.0 Error, EXPLAIN and HELP statistics
__________________________________________________________
Percent of commands that contained errors 7.8%
Ten most frequent errors:
1. NS command - no next screen 30.1%
2. First word of command is invalid 27.4%
3. FIND command with invalid index name 11.7%
4. DISPLAY command contains invalid word 4.3%
5. Search term missing from search command 2.7%
6. Max. # of ports to a Z39 db are in use 2.1%
7. KW search in database w/o KW index 2.0%
8. PS command - no previous screen 1.8%
9. DISPLAY command - no FIND results 1.8%
10. Valid command at an inappropriate time 1.4%
11. All others 14.7%
Ten most frequent EXPLAIN requests:
1. GUIDE 23.5%
2. FIND 15.0%
3. INDEXES 8.3%
4. COMMAND WORDS 6.6%
5. Unrecognized term 3.8%
6. PASSWORDS 3.2%
7. CATALOG 2.3%
8. DISPLAY 2.0%
9. ADD-ON SEARCH 1.9%
10. DATABASES 1.5%
11. All others 31.9%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.2%
2. First word of command is invalid 12.5%
3. FIND command with invalid index name 11.6%
4. DISPLAY command - middle of >1 screen 3.9%
5. DISPLAY command-first of >1 screen 3.8%
6. NS command - no next screen 3.3%
7. FIND command retrieves >1 book 3.2%
8. F/BR with index invalid in current DB 2.8%
9. Help requested from SET DB command 2.5%
10. DISPLAY command-complete in one screen 2.1%
11. All others 34.1%
Ten most frequent SHOW requests:
1. TIME 46.2%
2. HISTORY 26.2%
3. SEARCH 7.3%
4. GLOSSARY 3.5%
5. SETTINGS 2.2%
6. MAIL STATUS 1.8%
7. NEWS 1.5%
8. DATABASE NEWS 1.1%
9. MEDLINE NEWS 1.1%
10. LOCATION 0.9%
11. All others 8.4%
CATmm/dd cat MELVYL CATALOG DATABASE TELNET STATISTICS (weekly)