MELVYL CATALOG DATABASE TELNET STATISTICS
Time period: 05/05/01 through 05/11/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 750 2,695 3,445
Davis 1,965 260 2,225
Irvine 845 0 845
Los Angeles 16 570 586
Riverside 552 103 655
San Diego 465 180 645
San Francisco 333 0 333
Santa Barbara 341 270 611
Santa Cruz 391 171 562
LBL 0 93 93
LLL 0 86 86
Other - UC 29 207 236
CSL 0 125 125
CSU n/a 127 127
Other-Non-UC n/a 4,407 4,407
_______ ______ _____
5,687 9,294 14,981
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 295 988 8,459
2-4 a.m. 208 742 7,453
4-6 a.m. 236 739 7,360
6-8 a.m. 492 2,061 16,072
8-10 a.m. 1,826 5,829 43,091
10-12 a.m. 2,636 8,768 69,407
12-2 p.m. 2,610 8,458 64,702
2-4 p.m. 3,093 10,302 72,201
4-6 p.m. 1,963 6,510 47,290
6-8 p.m. 689 2,078 16,641
8-10 p.m. 503 1,383 9,657
10-12 p.m. 430 1,109 10,563
__________ __________ __________ _________________
Total: 14,981 48,967 372,896
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,813 8,795 10,608
Davis 6,009 1,070 7,079
Irvine 3,442 0 3,442
Los Angeles 48 1,476 1,524
Riverside 2,624 281 2,905
San Diego 1,231 319 1,550
San Francisco 543 0 543
Santa Barbara 1,346 570 1,916
Santa Cruz 2,006 294 2,300
LBL 0 171 171
LLL 0 239 239
Other - UC 38 580 618
CSL 0 210 210
CSU n/a 617 617
Other-Non-UC n/a 15,245 15,245
_______ ______ _____
19,100 29,867 48,967
1.3 Records Displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 15,211 70,778 85,989
Davis 45,012 7,708 52,720
Irvine 21,053 0 21,053
Los Angeles 303 8,768 9,071
Riverside 15,151 2,205 17,356
San Diego 7,268 2,263 9,531
San Francisco 4,639 0 4,639
Santa Barbara 9,690 4,155 13,845
Santa Cruz 10,844 3,507 14,351
LBL 0 2,640 2,640
LLL 0 2,593 2,593
Other - UC 130 3,634 3,764
CSL 0 1,288 1,288
CSU n/a 5,052 5,052
Other-Non-UC n/a 129,004 129,004
_______ ______ _____
129,301 243,595 372,896
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.5
Standard deviation in seconds 2.2
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.3
Standard deviation in seconds 0.4
2.0 COMMAND mode statistics:
____________________________
Median session length (minutes:seconds) 10:38
Average session length (minutes:seconds) 14:08
Longest session recorded (minutes:seconds) 1060
Average number of searches completed per session 3.2
Retrievals per search - median 2.0
Retrievals per search - average 65.9
Retrievals per search - standard deviation 1134.8
Percent of searches completed with 0 results 27.4%
Percent of searches entered that are long 3.8%
Percent of long searches completed
(includes partial results) 64.6%
Commands entered, by type, excluding errors:
Total Percentage
FIND 47,437 35.5%
DISPLAY (excluding automatic displays) 43,607 32.6%
ACFIND 12 0.0%
BROWSE 254 0.2%
SELECT 199 0.1%
HELP 860 0.6%
EXPLAIN 991 0.7%
SET/RESET 3,783 2.8%
SHOW 252 0.2%
AT 2,868 2.1%
ADD ON (AND, OR, AND NOT) 1,516 1.1%
LOGON or LOGOFF 23,964 17.9%
COMMENT 0 0.0%
SAVE 1,026 0.8%
USE 1,050 0.8%
OTHER 5,734 4.3%
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 7,158 14.4% 1,753 24.5% 12 103.5 870.4
AUTHOR 1,764 3.6% 457 25.9% 12 102.7 364.4
CORPORATE AUTH 464 0.9% 197 42.5% 18 490.3 1647.0
EXACT CA 6 0.0% 3 50.0% 938 1485.7 1769.3
TITLE WORD 11,697 23.6% 3,652 31.2% 4 75.2 2234.9
EXACT TITLE 9,236 18.6% 2,455 26.6% 2 19.6 148.9
TITLE -> TW 1,117 2.3% 298 26.7% 8 47.1 128.1
TITLE -> XT 1,232 2.5% 618 50.2% 1 4.9 17.6
SUBJECT 2,467 5.0% 901 36.5% 64 534.1 2441.7
EXACT SUBJECT 147 0.3% 35 23.8% 43 290.1 705.5
PERIODICAL 7,842 15.8% 1,611 20.5% 5 73.6 871.7
EXACT PE 3,287 6.6% 690 21.0% 3 36.6 521.3
RPE 5 0.0% 1 20.0% 20 41.0 56.9
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 96 0.2% 19 19.8% 43 170.3 237.9
DATE 743 1.5% 183 24.6% 3 61.9 303.0
FORM 457 0.9% 108 23.6% 12 192.1 1928.8
NUMBER* 21 0.0% 10 47.6% 1 50.9 98.4
MUSIC* 84 0.2% 51 60.7% 3 161.2 888.8
SERIES 1,072 2.2% 371 34.6% 4 62.2 321.1
UNIFORM TITLE 11 0.0% 2 18.2% 28 918.7 1424.0
Other indexes 727 1.5% 260 35.8% 1 20.5 104.2
* 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 2,701 5.8% 790 29.2% 3 47.4 220.3
Single 44,066 94.2% 12,060 27.4% 4 94.5 1390.3
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 15 6.6% 4 26.7% 11 84.7 115.2
CORPORATE AUTH 3 1.3% 2 66.7% 80 80.0 0.0
EXACT CA 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 192 84.6% 46 24.0% 47 127.4 170.5
EXACT SUBJECT 13 5.7% 2 15.4% 36 158.8 236.7
UNIFORM TITLE 0 0.0% 0 0.0% 0 0.0 0.0
SERIES 4 1.8% 2 50.0% 18 18.0 18.4
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 234 100% 58 24.8% 44 123.0 169.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 11.9%
BRIEF 66.5%
LONG 9.9%
MARC 3.1%
FIELDS 2.5%
TAG 3.1%
PERIODICALS 0.0%
COMMENTS 0.0%
Other (includes BROWSE, ACFIND) 3.1%
3.0 Error, EXPLAIN and HELP statistics
__________________________________________________________
Percent of commands that contained errors 7.7%
Ten most frequent errors:
1. NS command - no next screen 29.6%
2. First word of command is invalid 26.8%
3. FIND command with invalid index name 10.6%
4. DISPLAY command contains invalid word 5.0%
5. Max. # of ports to a Z39 db are in use 3.1%
6. Search term missing from search command 2.5%
7. KW search in database w/o KW index 2.3%
8. PS command - no previous screen 2.0%
9. Valid command at an inappropriate time 1.6%
10. DISPLAY command - no FIND results 1.6%
11. All others 14.8%
Ten most frequent EXPLAIN requests:
1. GUIDE 25.6%
2. FIND 14.3%
3. INDEXES 7.7%
4. Unrecognized term 5.5%
5. COMMAND WORDS 5.0%
6. PASSWORDS 3.2%
7. DISPLAY 2.3%
8. DATABASES 2.2%
9. NRLF 2.0%
10. CATALOG 1.9%
11. All others 30.1%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 24.1%
2. First word of command is invalid 14.7%
3. FIND command with invalid index name 11.3%
4. DISPLAY command - middle of >1 screen 5.5%
5. NS command - no next screen 2.5%
6. FIND command retrieves >1 book 2.5%
7. DISPLAY command-first of >1 screen 2.5%
8. TW search with zero results 2.4%
9. DISPLAY command-complete in one screen 2.2%
10. DISPLAY command - last of >1 screen 1.9%
11. All others 30.4%
Ten most frequent SHOW requests:
1. HISTORY 54.7%
2. SEARCH 9.9%
3. GLOSSARY 7.8%
4. MAIL STATUS 7.4%
5. SETTINGS 4.1%
6. DATABASE NEWS 2.5%
7. SYSTEMS INFORMATION 1.2%
8. INSPEC LOADING STATISTICS 0.8%
9. PSYCINFO LOADING STATISTICS 0.8%
10. UCB LIBRARY HOURS 0.8%
11. All others 9.9%
CATmm/dd cat MELVYL CATALOG DATABASE TELNET STATISTICS (weekly)