MELVYL CATALOG DATABASE TELNET STATISTICS
Time period: 02/17/01 through 02/23/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 854 2,459 3,313
Davis 1,853 213 2,066
Irvine 704 0 704
Los Angeles 128 625 753
Riverside 569 108 677
San Diego 447 289 736
San Francisco 301 0 301
Santa Barbara 456 297 753
Santa Cruz 366 263 629
LBL 0 138 138
LLL 0 80 80
Other - UC 40 238 278
CSL 0 147 147
CSU n/a 265 265
Other-Non-UC n/a 4,531 4,531
_______ ______ _____
5,718 9,653 15,371
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 236 812 5,770
2-4 a.m. 210 606 6,711
4-6 a.m. 184 617 5,104
6-8 a.m. 451 1,410 10,621
8-10 a.m. 1,654 5,800 43,763
10-12 a.m. 2,882 10,204 71,384
12-2 p.m. 2,785 9,371 66,390
2-4 p.m. 3,076 11,121 82,380
4-6 p.m. 2,076 6,630 48,264
6-8 p.m. 863 3,026 21,978
8-10 p.m. 558 1,832 13,182
10-12 p.m. 396 1,181 7,774
__________ __________ __________ _________________
Total: 15,371 52,610 383,321
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,436 6,357 8,793
Davis 7,146 1,004 8,150
Irvine 3,196 0 3,196
Los Angeles 299 1,615 1,914
Riverside 1,772 297 2,069
San Diego 1,238 499 1,737
San Francisco 510 0 510
Santa Barbara 1,457 721 2,178
Santa Cruz 2,417 1,152 3,569
LBL 0 213 213
LLL 0 202 202
Other - UC 48 794 842
CSL 0 390 390
CSU n/a 1,043 1,043
Other-Non-UC n/a 17,804 17,804
_______ ______ _____
20,519 32,091 52,610
1.3 Records Displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 18,281 48,099 66,380
Davis 52,569 5,317 57,886
Irvine 17,333 0 17,333
Los Angeles 2,363 12,211 14,574
Riverside 15,844 2,736 18,580
San Diego 7,405 4,825 12,230
San Francisco 3,438 0 3,438
Santa Barbara 10,824 7,478 18,302
Santa Cruz 8,438 5,720 14,158
LBL 0 2,283 2,283
LLL 0 3,127 3,127
Other - UC 754 5,600 6,354
CSL 0 3,011 3,011
CSU n/a 10,042 10,042
Other-Non-UC n/a 135,623 135,623
_______ ______ _____
137,249 246,072 383,321
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.9
Standard deviation in seconds 5.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.4
Standard deviation in seconds 2.9
2.0 COMMAND mode statistics:
____________________________
Median session length (minutes:seconds) 8:20
Average session length (minutes:seconds) 13:15
Longest session recorded (minutes:seconds) 566:47
Average number of searches completed per session 3.4
Retrievals per search - median 2.0
Retrievals per search - average 61.9
Retrievals per search - standard deviation 926.2
Percent of searches completed with 0 results 27.8%
Percent of searches entered that are long 4.1%
Percent of long searches completed
(includes partial results) 60.9%
Commands entered, by type, excluding errors:
Total Percentage
FIND 51,076 35.7%
DISPLAY (excluding automatic displays) 47,045 32.9%
ACFIND 21 0.0%
BROWSE 276 0.2%
SELECT 147 0.1%
HELP 1,254 0.9%
EXPLAIN 1,319 0.9%
SET/RESET 3,787 2.6%
SHOW 490 0.3%
AT 2,879 2.0%
ADD ON (AND, OR, AND NOT) 1,502 1.1%
LOGON or LOGOFF 24,401 17.1%
COMMENT 7 0.0%
SAVE 1,214 0.8%
USE 1,205 0.8%
OTHER 6,320 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 8,989 16.5% 2,371 26.4% 9 76.9 434.6
AUTHOR 2,230 4.1% 547 24.5% 12 110.5 335.8
CORPORATE AUTH 468 0.9% 184 39.3% 37 875.7 3065.5
EXACT CA 10 0.0% 6 60.0% 105 1002.5 1862.1
TITLE WORD 12,903 23.7% 4,296 33.3% 4 41.2 256.1
EXACT TITLE 8,522 15.7% 2,387 28.0% 2 24.6 296.6
TITLE -> TW 1,051 1.9% 253 24.1% 9 56.9 144.7
TITLE -> XT 1,264 2.3% 612 48.4% 2 12.7 137.2
SUBJECT 3,172 5.8% 1,259 39.7% 49 429.4 3552.1
EXACT SUBJECT 125 0.2% 40 32.0% 44 390.0 2169.1
PERIODICAL 9,007 16.6% 1,904 21.1% 5 90.6 1363.2
EXACT PE 3,516 6.5% 525 14.9% 3 30.0 444.6
RPE 8 0.0% 6 75.0% 75 74.5 102.5
XRP 2 0.0% 1 50.0% 22 22.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
LANGUAGE 146 0.3% 23 15.8% 56 193.5 701.6
DATE 600 1.1% 161 26.8% 3 55.4 296.3
FORM 543 1.0% 125 23.0% 16 161.0 1155.0
NUMBER* 42 0.1% 9 21.4% 2 2.4 2.4
MUSIC* 15 0.0% 10 66.7% 4 11.6 17.0
SERIES 1,050 1.9% 338 32.2% 3 44.6 120.9
UNIFORM TITLE 9 0.0% 4 44.4% 75 131.2 170.6
Other indexes 740 1.4% 312 42.2% 1 9.8 37.4
* 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 3,987 7.9% 1,336 33.5% 2 45.9 486.5
Single 46,194 92.1% 12,650 27.4% 5 88.9 1137.1
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 65 25.8% 15 23.1% 15 46.5 71.1
CORPORATE AUTH 1 0.4% 0 0.0% 1 1.0 0.0
EXACT CA 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 161 63.9% 43 26.7% 38 175.8 697.1
EXACT SUBJECT 23 9.1% 4 17.4% 22 65.6 102.5
UNIFORM TITLE 2 0.8% 2 100% 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 258 100% 65 25.2% 30 127.6 549.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 11.3%
BRIEF 67.4%
LONG 10.9%
MARC 3.3%
FIELDS 2.6%
TAG 2.2%
PERIODICALS 0.0%
COMMENTS 0.0%
Other (includes BROWSE, ACFIND) 2.3%
3.0 Error, EXPLAIN and HELP statistics
__________________________________________________________
Percent of commands that contained errors 8.0%
Ten most frequent errors:
1. NS command - no next screen 27.7%
2. First word of command is invalid 27.3%
3. FIND command with invalid index name 12.5%
4. DISPLAY command contains invalid word 4.8%
5. Search term missing from search command 2.6%
6. DISPLAY command - no FIND results 2.0%
7. PS command - no previous screen 1.9%
8. Max. # of ports to a Z39 db are in use 1.9%
9. KW search in database w/o KW index 1.8%
10. Valid command at an inappropriate time 1.7%
11. All others 15.7%
Ten most frequent EXPLAIN requests:
1. GUIDE 25.2%
2. FIND 18.0%
3. COMMAND WORDS 6.0%
4. INDEXES 5.7%
5. Unrecognized term 5.1%
6. PASSWORDS 3.0%
7. ADD-ON SEARCH 2.1%
8. AT 1.7%
9. DISPLAY 1.7%
10. CATALOG 1.7%
11. All others 29.9%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 22.4%
2. First word of command is invalid 13.1%
3. FIND command with invalid index name 12.9%
4. DISPLAY command - middle of >1 screen 4.5%
5. FIND command retrieves >1 book 3.1%
6. DISPLAY command-first of >1 screen 2.7%
7. F/BR with index invalid in current DB 2.3%
8. DISPLAY command-complete in one screen 2.1%
9. NS command - no next screen 2.1%
10. 231 1.9%
11. All others 33.0%
Ten most frequent SHOW requests:
1. HISTORY 26.2%
2. NEWS 13.8%
3. TIME 11.3%
4. BOOK STATISTICS 10.7%
5. STATISTICS 10.5%
6. SEARCH 8.4%
7. GLOSSARY 6.7%
8. SETTINGS 2.5%
9. SYSTEM NEWS 1.7%
10. MAIL STATUS 1.3%
11. All others 7.1%
CATmm/dd cat MELVYL CATALOG DATABASE TELNET STATISTICS (weekly)